EP0741259A2 - Inlet and overflow mountings for a bath tub - Google Patents

Abstract

The fitting has an anti-siphon device (1-3) set below the level of the upper edge (22) of the bath. The anti-siphon device is in the form of a free flow stretch (2) of at least 20 mm laterally off-set above a drain funnel (14) or next to the overflow hole (20) between the back of the bath tub and its tile cover. The mixer supply nozzle and the re-entry or diversion bore (8) are set at the end of the free flow section so that when the water is sucked back from the filled bath through the re-entry or diversion bore the supply nozzle lies outside of the returning water stream. The axes of the nozzle and bore corresponding to the flow direction of the water are angled at about 30 deg. to each other.

Description

The invention relates to protection against back suction (DIN 1988 part 4, SVGW / TPW 135,126 and CEN / TC 164N453) of a combined bath tub inlet and overflow fitting. The protection, without a moving part, is, like the bathtub inlet, below the level of the upper edge of the bathtub.
For an inlet and overflow (and waste) set at the overflow hole of the bath, DIN 1988, Part 4, Paragraph 4.2. Before, if there is no free outlet, since the tub inlet is located below the highest possible level of dirty water, i.e. below the top edge of the tub, a DVGW approved pipe interrupter A2, 150 millimeters above the tub edge, must be installed.
Bath fill fittings at the overflow hole, which do not require a pipe interrupter A2, that is to say intrinsically safe, are described in patent specifications DE 37003360C2 and in DE-AS2115845, as well as in the applications of the applicant DE 4439050A1, analogously, EPA, publication numbers 0671514A2 and DE 19515959.4.

, sich der Wannen-Zulauf immer 20 Millimeter über dem maximal möglichen Schmutzwasserspiegel befindet; wodurch aber das Design dieser Garnitur negativ beeinflußt wird. Diese Form führt auch dazu, daß die Garnitur als Haltegriff verwendet wird, was eine besonders robuste Ausführung erfordert.In the case of PS DE 3700360c2, an A2 can be dispensed with, since, according to DIN EN 232 H ₁ max, that is, an overflow hole D ₁ = 52 arranged particularly far below the upper edge of the bath tub $\genfrac{}{}{0ex}{}{\text{+3}}{\text{-2}}$

, the tub inlet is always 20 millimeters above the maximum possible dirty water level; but which affects the design of this set negatively. This shape also means that the set is used as a handle, which requires a particularly robust design.

) müssen ausgeleitet werden, der Sicherheitsüberlauf und der Wannen-Überlauf. Der in die Badewanne führende Auslauf hat hier einen relativ großen Querschnitt, was mit sich bringt, daß der durch das Überlaufloch auszuleitende Sicherheitsüberlauf, dessen Querschnitt größer als vorst. Auslauf sein soll, in D ₁ viel Fläche beansprucht. Die Garnitur in DE-AS 2115845 scheint auch nicht zu berücksichtigen, daß als höchster Schmutzwasserspiegel das Niveau des oberen Badewannenrandes angesehen wird. Falls bei der vorst. Garnitur Ausbildung mit AB ein Überfüllen der Wanne, bei verschlossenem, dort sog. Sicherheitsüberlauf der Badewanne überhaupt möglich wäre, würde das, bei Druckabfall, bei dem in die Badewanne führenden Auslauf herein gestaute Badewannenwasser vor die Mischwasser Zulauföffnung gelangen, da diese lotrecht über dem Auslauf angeordnet ist. Für den Fall, daß ein Überfüllen, wie vorst. theor. angenommen, nicht möglich ist, würde bei verstopften Siphon und geöffneter Mischwasser-Zufuhr laufend, über den Sicherheitsüberlauf des AB, unbemerkt Wasser in den Raum zwischen Badewannen-Rückseite und deren Fließenverblendung austreten. Der Ablauftrichter für den Sicherheitsüberlauf des AB hat keinen Sicherheitsüberlauf gemäß Anspruch 11 P4439050.5.DE-AS 2115845 can be regarded as "outlet with safety overflow AB". Through the overflow hole (D ₁ = 52 $\genfrac{}{}{0ex}{}{\text{+3}}{\text{-2}}$

) must be rejected, the safety overflow and the tub overflow. The spout leading into the bathtub here has a relatively large cross section, which means that the safety overflow to be discharged through the overflow hole has a larger cross section than before. Should be spout, takes up a lot of space in D ₁ . The set in DE-AS 2115845 also does not seem to take into account that the level of the upper edge of the bathtub is regarded as the highest level of dirty water. If at the vorst. Set training with AB an overfilling of the tub, with a closed, so-called safety overflow of the tub would be possible at all, if the drop in the spout leading into the bathtub comes into the bath water in front of the mixed water inlet opening, since this is arranged vertically above the spout. In the event that an overfill, as above. Theoretically assumed, it is not possible, if the siphon is blocked and the mixed water supply is open, water would escape unnoticed into the space between the back of the bathtub and its tile covering via the safety overflow of the AB. The drain funnel for the safety overflow of the AB has no safety overflow according to claim 11 P4439050.5.

The protection of an inlet and overflow set using the (BA) cartridge, P4439050.5 from the applicant, has the additional disadvantage of the moving parts on the BA system separating device, in addition to the structural effort for the easy replacement of the cartridge.

) möglichst viel Platz frei bleibt, zum einen für den Wannenüberlauf und zum anderen zudem noch für die Integrierung einer Heiß- und Kaltwasser-Mischer-Kartusche im Ablaufkopf der Garnitur, wie z.B. aus Fig. 2₁ rechts (und hierzu bitte Verkapselung Figuren ld und le) P4439050.5 zu ersehen.
Diese Aufgabe ist gemäß der Erfindung durch die Merkmale des Patentanspruches 1 gelöst.The bath filler and shower mixer in accordance with OS2653754 and the bath unit in accordance with PS2219325 both have no protection against back suction and are therefore not approved.
The invention is based on the problem of an inlet and overflow set, at the overflow hole of a bathtub, to provide simple protection against back suction, which can be arranged under the upper bathtubs and requires no moving parts. This protection should be arranged so that behind the overflow hole ( D ₁ = 52 $\genfrac{}{}{0ex}{}{\text{+3}}{\text{-2}}$

) as much space as possible remains, on the one hand for the tub overflow and on the other hand also for the integration of a hot and cold water mixer cartridge in the drain head of the set, e.g. from Fig. 2 ₁ on the right (and please encapsulate figures ld and le) P4439050.5 can be seen.
This object is achieved according to the invention by the features of claim 1.

Accordingly, it is proposed to arrange a separation distance of at least 20 millimeters, in principle as in the case of a pipe interrupter A1, without a moving part, preferably laterally offset, behind or next to the overflow hole, between the rear of the bathtub and its tile covering.

The above 20 millimeter separation distance is below the theoretically highest possible level of dirty water, but is always surrounded by atmosphere in the space between the back of the bathtub and its tile covering.
In the case of a pipe interrupter Al, without a moving part (DIN 1988 part 4), the so-called nozzle, i.e. the drinking water supply to the 20 mm separating section and the drinking water discharge line, are located below or behind the free flow section in one and the same line of symmetry. With over the upper edge, overflowing bathtub, assuming clogged tub overflow and previously maximum mixed water supply (36 ltr.min.), If the pressure drops in a known A1, as mentioned above, bath water would then be stowed in the A1 directly before inject the nozzle and could be sucked into the drinking water network if the vacuum develops.
According to the invention, therefore, the derivation of the free flow path is preferably angled at an angle of approximately 30 degrees to the line of symmetry in the nozzle and the free flow path. In the free flow section, from its actual drainage side, bath tub water stowed in from the overflowing bath tub cannot get in front of the drinking water supply nozzle and thus, below this, to a drain funnel, which is also between the back of the bath tub and its tile covering, under the free flow section is arranged to be derived.

According to a further embodiment of the invention, the water flow dammed into the free flow path can also be limited by appropriate orifices; in practice, the above angle of 30 degrees has proven to be advantageous.

There are two options for introducing the drain pipe from the drain funnel: on the one hand, a small separate siphon, preferably arranged parallel to the main siphon, into which, each time the tub is used, some splash water is deliberately introduced from the free flow path to prevent it from drying out and on the other hand, introduction of the drain pipe of the drain funnel into the existing overflow pipe and here at its lowermost end, in order not to impair the suction effect (similar to the slip shower hose box, see Fig. 5, 19515959.4). To be on the safe side, a safety overflow (see claim 11 P4439050.5) should be provided for the drain funnel, such as a drip tray that escapes from the tile facing to the bathroom floor in a ventilation grille.

The derivation from the free flow path, or the introduction to the tub, will be designed in this, under a cover of the set, in such a way that willful closing, for example by children playing, is not possible. At least one aerator-like sieve in front of the nozzle will prevent the discharge line from becoming blocked. This is the only way that the discharge funnel, under the free flow path, only has to be able to discharge the amount of water that can be stowed in at the maximum dam height, H ₁ max., Over the tub inlet at the 30 degree deflection.

The advantages that can be achieved with the invention are, in particular, that with the principle of the pipe interrupter A1, in which, according to the invention, the nozzle and the free flow path and their discharge, or their re-entry, in two lines of symmetry that are approximately at an angle of 30 degrees to one another tilted, arranged, protection against back suction is provided for an inlet and overflow set, which can be arranged under the upper edge of the bathtub and also has no moving parts.
The protruding pipe interrupter enables the protection to be arranged laterally offset behind the overflow hole. Such an A1 can also be used to protect a bathtub floor inflow (OS 2617643, 3909559A1 and 3920458A1). A hot and cold water mixer cartridge can also be integrated into the drain head due to the possibility of laterally offset arrangement of the protection against back suction; This means that the entire piping of a bathtub is only possible under this or behind its tile covering. Securing a valve with automatic hot water discharge, as can be seen from Figures 4α _1, 4α ₂ and 4b EPA 0671514 A2 or DE 4439050 A1 and DE 3920458 A1 or DE 3909559 A1, is instead of the (BA ) Cartridge, feasible.

Another advantage is the option of simply securing a hose shower. In combination with a pipe interrupter type A2, 150 mm above the edge of the bath tub, with moving part, secured inlet and overflow fitting, hose showers are preferably secured with a hose connection elbow, 300 millimeters above the tub edge, with flow aerator and backflow preventer. Special case slip shower, two non-return valves. With the intrinsically safe inlet and overflow set according to the invention, the shower hose would again have a free outlet, as is the case with commercially available bathtub edge systems Tub, known, with a so-called automatic changeover (Boger, Heizmann, Otto Radscheid: "Commentary on DIN 1988") shower after tub, with a pressure drop to an operating pressure of approx. 0.5 bar, with a disconnected hose connection and negative pressure, the ventilation of the drinking water system via a free outlet, here then not directly at the gooseneck tub inlet, but in front of the 20 millimeter stretch of the Al.

Further refinements of the invention are, in particular based on the previous applications EPA 0671514 A2, or P4439050.5 and addendum above. 19515959.4 in subclaims and also at the end of the following.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Show it

), zwischen Badewannen-Rückseite und deren Fliesenverblendung angeordneten freien Fließstrecke.
In Fig 1a ist farbig, bzw. mit unterschiedlicher Schraffur dargestellt: maximale Mischwasser-Zufuhr und das dabei, bei vollkommen freiem Hauptsiphon, sich einstellende Überlauf-Niveau des Badewannenwassers. Figure 1a
shows the sections AA, BB, CC and the views in the directions "Y" and "Z" of the laterally offset, behind the overflow hole ( D ₁ = 52 $\genfrac{}{}{0ex}{}{\text{+3}}{\text{-2}}$

), between the back of the bathtub and the tiled facing of the free flow section.
In Fig. 1a is shown in color, or with different hatching: maximum mixed water supply and the resulting overflow level of the bath water with a completely free main siphon.

Figure 1b
shows how the maximum overflow of the mixed overflow and assumed clogged tub overflow overflows the bathtub.
The drain pipe of the discharge funnel, which is arranged under the free flow path, is here, as in FIG. 3, the additional anm. 19515959.4 can be seen, connected to a separate siphon.

Figure 1c
shows how the bath overflows, as before. Fig. 1b and then pressure drop, which is dammed from the tub into the free flow path bath tub water, under the baffle and under the nozzle, to the drain funnel; there is a separation distance of 20 millimeters.

Figure 1d
shows how very small amounts of water, which do not yet form a water jet, from the nozzle, over the baffle plate, with the corresponding collecting rim, via which, at the 30 degree angle deflection, behind the free flow path, arranged troughs are discharged to the tub and thus made visible . In section BB the control or maintenance cover to the drain funnel, with the discharge of the mixed water to the bathtub, is removed. In addition to section BB, the cover with the molded-on drainage tube can be seen as a single part.

Figure 1e
shows a separate siphon for the drain funnel under the free flow path and a drip tray as a safety overflow (claim 11 EPA 0671514 A2 or P4439050.5) for the drain funnel. In the case of a ventilation grille, the drip tray is led out of the tile facing to the bathroom floor.

FIGS. 2a, b and c show a further embodiment of the free flow path, which here is arranged behind the overflow hole in the direction of the symmetry line of the overflow hole, inclined obliquely upwards.

Figure 2a
analogue 1a
Figure 2b
analogue 1b
Figure 2c
analogue 1c

Figure 2d
shows how, analogous to FIGS. 2a, b and c, a hot and cold water mixer cartridge, eccentrically to the overflow hole in the tub, is integrated in the drain head, as an alternative to the solution that is likely to be preferred according to FIGS. 4a below and b.

A further embodiment, which shows a raw circuit breaker A1 arranged at the side with 30 angular degree deflection, can be found in FIGS. 1b (analog here 1a), 1c (analog here 1b) and 1d (analog here 1c) of the additional application 19515959.4.

Figure 3
shows how here, preferably as an improvement over the previous figures of the said additional application, a half-moon-shaped diversion, which is divided into two tubes, is to be provided through the overflow hole. Air can be drawn in in one crescent segment, while bath water that is stowed in the other crescent segment is discharged to the drain funnel.

Figure 4a
shows a special housing for a standard hot and cold water mixer cartridge, to which the maintenance cover, for access to the discharge funnel for the free flow path, with the mixed water supply line to the bathtub, as can be seen in particular from FIG. 1d of the previous figures, is molded ; Integration of the mixer cartridge into the drain head similar to Figures 2 ₁ right and 1d and e, EPA 0671514 A2 or P4439050.5!

Figure 4b
shows the installation of a mixer cartridge according to vorst. Fig. 4a in a drain head.

FIGS. 5a, b and c show a hot and cold water mixer cartridge also inserted behind the overflow hole between the rear of the bathtub and its tile covering.

Figure 5a
shows a section AA, analogous to Figure 1a above, the diameter of the overflow hole in the bathtub, as well as its upper edge, with theoretically max. Wall thickness is shown at H ₁ min = 60 mm. In the valve version shown, the space behind the overflow hole is completely free for only the installation of a hot and cold water mixer cartridge. This is achieved because this faucet Tub overflow, by means of a communicating tube (DE 3610006 A1, EPA 0305572 B1, EPA 0446177 B1, EPA 0446179 B1), at the drain hole, in addition here a mixed water inflow is provided on the tub floor; please see the following figures 6a-f.

Figure 5b
shows a section BB, also analogous to vorst. Fig. 1a.

Figure 5c
Section CC

FIGS. 6a-f show how a mixed soil water inflow in combination with a tub overflow at the drain hole and protection against back suction by means of a free flow path can function in a hygienically acceptable manner. The mixed water inflow is largely separated from the tub drain and overflow. In the inflow, a distance of at least 300 millimeters, similar to a pipe separator installation type 3, DIN 1988, part 4, can dry out in the resting or separating position in order to prevent the migration of bacteria.

Figure 6a
Drained bath

Figure 6b
Fill the bathroom

Figure 6c
Bath filled, fill stop

Figure 6d
Hot water slackening

Figure 6e
Drain the bathroom

Figure 6f
cleaning

The following is an explanation of the invention with reference to the drawings after assembly, please also list the following item number with text and mode of operation of the invention shown:

Figures 1a, b, c and d
contrary to Figures 1a-d the additional note. 19515959.4, addition to P4439050.5 or EPA 0671514 A2, the free flow path according to claims 1, 2, 3 and 4 of this application is offset to the side of the overflow hole (20), behind or next to it in the space between bathtubs (21) -Rear side and their tile facing (33) arranged. The free flow path (2) is in the atmosphere.
The axis (3) of the inlet nozzle (1) and the central axis (7) of the bore (8) leading to the inlet form an angle with one another, in this case about 30 °. The axis (7) lies approximately horizontally or slightly inclined upwards (for dripping water, please see Figure 1d), whereas the axis (3) is directed obliquely upwards.

FIG. 1a shows the maximum tub inflow, 36 l / min, with a fully functioning bathtub overflow (20, 19, 18), that is, with an assumed completely free siphon (36) of the inlet and outlet fittings. It shows how the mixed water emerges from the nozzle (1) and is sprayed as a water jet, or the free flow path (2), through the through hole (4), in the baffle plate (5), and at the re-entry hole (8), the slope (11) and the edge (12), deflected by 30 angular degrees, in which suction tube (9) is forwarded, via the coupling point (31, 30) in the tube with its 90 angular degree deflections (10, 26, 27, 28, 29) through the overflow hole (20) to the bathtub (21). The free flow path (2) lies like the nozzle (1) in the symmetry line (3), while, at the end of the free flow path (2), the water jet (2), deflected by 30 degrees, in the symmetry line (7) in the the re-entry bore (8) and the suction tube (9) lie, in which it is passed on to the bathtub (21). The re-entry bore (8) is surrounded by the inclined edge (11, 12), which runs upwards and to the underside of the upper edge of the bathtub (22).
The gutter (13) and the edge (12, 11) around the bore (8) can be designed so that every time you use the tub, some splashing water, via the drain funnel (14) and its discharge pipe (15), in the, if this Solution chosen, second separate siphon (35) is guided so that it can not dry out.

In Figure 1b the case is assumed that the overflow pipe (18) or the main siphon (36) of the inlet and overflow set are clogged and still continue to 36 ltr./min. Mixed water, as from above. Fig. 1a to see flow into the tub (21). The water can no longer flow out of the trough (21), as in FIG. 1a, via the overflow hole (20), the overflow space (19), in the drain head (16) and the overflow pipe (18). A washcloth could also close the tub overflow (20, 19, 18) if the siphon (36) is free. The bathtub (21) overflows over its upper edge (22). The free flow path (2) is below the level of the bathtub (dirty) water. Due to the incoming mixed water (1), however, no bath tub water can be pushed in (stowed) via the suction tube (9, 10, 26, 27, 28, 29) and the bore (8) (approx. ⌀9 mm).

The case is assumed in FIG. 1c , in the case of a fully overflowing bathtub according to the previous FIG. Due to the accumulation height H ₁ : line of symmetry of the overflow hole (20) to the top edge of the bathing area (22) now splashes through the suction tube (9) and the hole (8), as a water column in the line of symmetry (7), bath water into the room (25) under the baffle (5). The water column, bore (8) about 9 millimeters in diameter, splashes under the through bore (4) and is, in a further downward-widening course at the baffle (34) of the baffle plate (5), discharged into the drain funnel (14) .

To drain the water from the drain funnel (14, 15), please see the description above. If no separate siphon (35) is selected, the discharge pipe (15) is introduced at the bottom into the overflow pipe (18) and the drip tray (37) is the safety overflow, the tray (37) can also be directly under the funnel (14) above for whose derivation and discharge (38) can use the suction pipe effect as described in 19515959.4 for Figure 7.

For veneering, because of possibly better spray water drainage according to (37), especially in the event that the drainage should be laid at (8), which should only be theoretically possible, can be around the free flow path (2) and at all (1, 4, 5, 34, 8, 11, 12, 9) a kind of additional hood can be arranged. This hood could, in addition to a possibly 1. aerator-like noise reduction on the nozzle (1), also be designed as sound insulation. The nozzle (1) diameter will in any case be chosen in such a way that no excessive flow velocities arise due to the noise. In accordance with a nozzle enlargement, the re-entry bore (8) would also have to be enlarged. The upper limit for the diameter of the re-entry bore (8) lies in the fact that, as can be seen and described in FIG. 1c, not too much bath water can be stowed in and thus would have to be drained off via the discharge funnel (14).

Figures 2a, b and c
the above description of FIGS. 1a, b and c applies here. However, the end of the suction tube (9 ') is introduced directly into the bathtub (21) through the overflow hole (20); the derivatives (10, 26, 27) are omitted here. In this embodiment, the axes 3 'and 7' lie in one plane, namely a vertical plane which corresponds approximately to the central plane of the bathtub. The angles between the axes 3 'and 7' are again approximately 30 °, the axis 7 'being inclined slightly upwards and the axis 3' being angled upwards relative to the axis 7 '.

2a, b and c, the position numbers of FIGS. 1a, b and c are provided with '. FIG. 2b additionally shows the design, as can be seen in FIG. 3 below, or in FIGS. 1a, b, c and d in 19515959.4. Also shown here is a splash water collecting funnel (39) arranged around the 30 angular degree deflection (3, 7). Unnecessary splash water during the 30 degree deflection would be caught here, even better than in the previous figures 1, and torn out into the suction tube (9).

In Figures 2 it can also be seen particularly well, as in the case of the protection according to the invention by means of A1, preferably with a deflection of 30 degrees, in particular with respect to Fig -Introduction, except for the suction tube (9) outlet, or in Figures 1 (29, 28, 27, 26, 10, 9, 8), hermetically (23 ') from the bathtub (21), or from the overflow space (19) is separated.

In order to always have an immovable assignment of nozzle (1 ') and re-entry or collection bore (8'), with exclusion of all manufacturing tolerances, here is a hydraulic coupling point, not shown, in principle like 30, 36 in Fig. 1, between The outlet of the collecting bore (8 ') and the entry into the suction tube (9') must be arranged.

Figure 3
The separate pipes (42) through which air can be drawn into the space (40) between the nozzle (1) and the through hole (4) in the baffle plate (5) in the event of pressure drop and vacuum in front of the nozzle (1) and the separate discharge through the overflow hole (20) by means of the tube (43), from the space (41) below, represents, compared to the embodiment, as can be seen in FIGS. 1a, b, c, d, note 19515959.4, with only one tube (307), is an improvement.

In the following, a bathtub inlet and overflow set (s), in particular with an integrated fitting, also arranged at the overflow hole, for mixing hot and cold water with the possibility of adjusting the amount of mixed water and preferably switching from tub to shower, the protection against sucking back by means of a Pipe interrupter design (A1), without a moving part, but preferably with derivation angled by 30 degrees from the free flow path, according to claims 1, 2 of this application.
Please: "Combined bathtub inlet and overflow fitting with shower switchover and integrated system separator (BA)" EPA 0671514 A2, analogous to P4439050.5 and, in addition to this, priority to this application, add. 19515959.4.
The protection by means of (BA) can, with the exception of possible individual cases, be replaced by the free flow path according to the invention under the upper edge of the bathtub. Complete bath taps on or behind the overflow hole with a bath inlet underneath the upper bath rim are much easier.

For the descriptions below, please see Figures 4a, b and 2d and 5a, b, c and the corresponding item number list with text.

Figure 4a, b
The hot and cold water mixer cartridge with special housing (48, 49, 50, 23 ', 31') is, in principle, as shown in Figure 2 above. Note to see, installed in the drain head (16 °) behind the overflow hole (20). The manner in which the water is guided to and from the sealing point (44, 45 and 46) of the mixer cartridge in channels (55) is known on the one hand from standard single-lever mixer fittings and on the other hand from FIG. 2 above. To be seen; in section CC such channels can also be seen in Fig. 4b. At the drain head (16 °) there are two pressure hose connections for the hot and cold water supply and probably also a connection to the shower hose, please refer to the block diagram in Figure 5c below.
The discharge (46) of the mixed water from the mixer cartridge integrated in the drain head (16 °) takes place internally in the drain head, in a kind of fixed piping, or via a channel analog. (55), to the nozzle 1. For fittings with shower hose connection (like Item 126 in Fig. 2 Registration), the automatic bath / shower switchover will be arranged between (46 and 1), as described at the beginning of the description and as can also be seen from the block diagram on FIG. 5c.

The arrangement and the function of the protection against back suction is the first. Figures 1a, b and c can be seen.

Figures 5a, b and c
Figures 5a and b are also conceivable without a tub overflow (75) at the drain hole (74) of the tub (21). There is then a fitting as described with the preceding FIGS. 4a and b, but with mixed water inflow at the bottom of the tub (21). The mixed water from the suction tube (9) is then not passed through the overflow hole (20, 27, 28, 29), but via the bottom inflow (82, 89) into the tub (21). Except for the derivation (71) from the suction tube (9) outlet to the bottom inflow, the functioning of the protection is as before. Described in Figures 1a, b, c and 4a, b.

In the case of a bottom inflow (71, 82, please also refer to the following FIGS. 6a-f) and overflow (75) at the drain hole (74), FIGS. 5a and c, in the drain head (62, 63, 64, 65) no more overflow space (19), except for the encapsulation (65, 66, 67, 68) of the cartridge seal (58, 44, 45, 46), its control over (69), analogously (57) for the MINI 5b (and for this purpose please also, for example, in Fig. 2, note 133, 134, 135), then everything can actually be open to the space behind the tub (21, 33).

In the embodiment combination not shown:
Overflow at the drain hole (74) and mixer cartridge according to FIG. 4a, with mixed water being introduced through the overflow hole (20, 50), two access (control) covers would then be required in the overflow space (19), one (23 ') to the drain funnel (14) and on the other hand a maintenance cover (78) for the overflow communicating tube (75) after its expiration (76). In theory, the cover (23 ') to the drain funnel (14) is no longer necessary, since there is no longer any overflow space (19)! The decorative cover (67 ') would then be in addition to the mixer cartridge-pin bushing (69) and the axis for the lever tub plug (96) OPEN / CLOSE also the mixed water discharge tube (27 ') sealed to the tub (21); only through this (29, 50, 27) could tubs (21) overflow water be stowed into the drain funnel (14).

In the case of an inlet and overflow set with bottom inflow and overflow at the drain hole, there is only one hole in the decorative cover (67 Fig. 5c) of the so-called overflow hole (20) for the sealed passage of the axis for the lever for tub plug OPEN / ZU (housing 32) and possibly also a sealed passage for the control tube (57) and possibly also the tube (not shown) for discharge from the encapsulation space (73).

Further refinements of the invention

FIGS. 6a-f show the possible implementation of a mixed water floor inflow in combination with a tub overflow at the drain hole and the protection against back suction according to the invention; please see figures 5a, (b) and c above.

The bottom inflow shown (71, Figure 5b) is also conceivable without an overflow (75, 76) at the drain hole (74).
In the floor inflows known for example from EPA 90101365.6 / 0386426 A2, Figures 4 and 5 and EPA 89116643.1 / 03888512 A2, Figure 2, drinking (mixed) water inflow and tub outflow are clearly separated, the tubs in the above embodiments -Inflows are also above the drain hole and can run out and dry out if no additional backflow preventer is installed. The disadvantage of the above statements is that the inflows cannot be integrated into the standardized drain hole D ₂ and therefore special bathtubs are required. In Fig. 1 vorst. Note 90101365/0386426 and in Figure 1 OS 2617643, bottom inflows integrated into the drain hole are shown. The disadvantage of these inlets is that they are under the cover of the drain hole, which contradicts the particularly sensitive hygiene considerations here. Also in the known inlet and overflow fittings at the overflow hole D ₁ , the tub inflow, or the aerator of which is also in the tub water and which means of an A2 are secured, a loop is usually formed with the pressure hose connection to the drain head, in which water remains, which means that the supply line to the tub inlet (aerator), between this and the A2 in the disconnected position, or its actually open outlet, is also not ventilated.

6a-f show how a floor inflow (89) integrated in the standardized drain hole D ₂ (74) is arranged above the cover (80) of the drain hole (74) and, however, with the drinking (mixing) ) Water pipe (84), from below through the drain and overflow hole (74), no siphon-like pipe loop is formed in order to be able to ensure that the vertical mixed water supply pipe (94) from the free, arranged below the upper edge of the bath tub (22) Flow section (1, 2, 8), at bath AUS, drained, run out and dry out like the 300 millimeter section of a pipe separator installation type 3, DIN 1988 part 4.
The bottom inflow (82, 86, 88, 89) must also be designed, as not shown here, that a willful closing, z. B. as above. is not possible by children playing.

Figure 6a Bad AUS, drained rest position; the hot and cold water mixer cartridge (58) is closed, the tub plug (96) OPEN, the "fill stop" float (97) lies on top (96), the backflow preventer (85) closes the top vertical tube (84), which is led through the drain and overflow hole (74) up to the floor inlet (89); at the bottom of the vertical tube (84) or from its lower outlet (90) (to the channel siphon (36) ) the plug (91) is open, ie pulled upwards by the spring (92), since no mixed water flows in from (1, 8) via (94, 95).

The pipes (94, 95 and 84) could leak and can therefore dry out.

Figure 6b Fill the bath. The mixer cartridge (58) is open, mixed water flows from the nozzle (1, 2, 8) over (94, 95, 102, 84, 83) to the bottom inflow (82); since the plug (96) is closed, the water level rises in the tub (21) and in the communicating tube (75). The so-called aggregate ball or the plug (91) is sealed against the force (spring) (92) by the system pressure still present behind the free flow path (2, 8) at the outlet (90) (opposite is the pressure the damming height of the tub water level). Of the Backflow preventer (85) is open. Even if (91, 90) had not closed tightly, the tub would be filled properly, since the space (103) was closed by means of the plug (96) according to (36).

Figure 6c bath filled, "filling stop", tub plug (96) CLOSED, mixer cartridge (58) turned off. Since mixed water no longer flows into the vertical pipe (94, 95), the plug (91) in the pipe (84) can no longer discharge (90) against the force of the spring (92) with the water level that corresponds to the tub water level ) close. So that the pipes (84, 95, 94) as well as the overflow pipe (75) from the "fill stop" float (97) are separated from the tub (21) water, the "fill stop" float (97) closes with one part from its top (in the area of 99) the sealing seat (98) at the bottom of the pipe (84), the backflow preventer (85) is closed The water in the bath tub (21) is separated from the water in the pipes (75 and 94). Even if the RV (85) were leaking or removed and even if the float (97) did not cover the tube (84) at (98) below, bath tub water could not flow to the siphon (36), since the room (103) with the plug (96) is closed.

Figure 6d hot water subsidence; Tub stopper (96) and mixer cartridge (58) OPEN, "fill stop" float (97) does not float, rests on (96), mixed water flows to the tub as described in Figure 6b above.

Theoretically, the plug (96) would not have to be opened when the hot water subsided, with the "fill stop" float (97) resting on (96), the incoming mixed water could also flow via the overflow, the communicating tube (75) to ( 76, 36) drain off.

Figure 6e Drain bath; Mixer cartridge (58) CLOSED, plug (96) OPEN, "fill stop" float (97) below, lies on (96) on backflow preventer (85) CLOSED, pipe (84), with opened plug (91, 92, 90 ) open at the bottom (see "Fill stop" float). Despite the fact that the outlet (90) is now open, since the bath water and the water in (75, 94) flow to or via the siphon (36), no bath water is stowed in the pipes (84, 95, 94), at most arises from the water flowing out as described above (still 36) with (90 or 98) suction.

Figure 6f cleaning shows how the bottom inflow (82) or the cover (80) of the drain and here overflow hole (74) can be pulled out of the fastening part (101), in particular for cleaning; the float (97) and the stopper (96) can then also be removed towards the tub.

List of position numbers with text Figures 1a, b, c, d and e

• 1. Nozzle or mixed (drinking) water supply for
• 2. free flow path
• 3. line of symmetry in the nozzle (1) and the free flow path (2), as well
• 4. the through hole in addition
• 5. baffle with which
• 6. Collecting edge for very small amounts of mixed water, see s. b. Fig. 1d;
• 7. Line of symmetry in the
• 8. (reentry) drilling,
• 9. the suction tube, as well as its
• 10. lead tubes are lying;
• 11. 30 degree of inclination
• 12. with edge around the bore (8), the bore (8), or the edge (12) and the slope (11) adjoining
• 13. Drip water drainage channel
• 14. Drain funnel
• 15. Drain pipe from the drain funnel
• 16. Drain head
• 17.Seal for sealing the drain head to the back of the bathtub, the attachment of the exhaust air head to the tub wall, via a ring on the bathtub side is not shown further, please refer to e.g. EPA 0671514 or P4439050.5,
• 18. Overflow or drain pipe
• 19. from the overflow space in the drain head (16)
• 20. Overflow hole in the
• 21.bathtub,
• 22. upper bathtub rim,
• 23. Access cover in the drain head (16) to the drain funnel (14),
• 24. Sealing edge, for example with an inserted NHA ring (not shown) in a corresponding groove for this in (16), for sealing from (23)
• 25. So-called space under the baffle plate (5)
• 26. 90 angular degree deflection (10) after
• 27. Mixed water discharge tube, through the overflow hole (20)
• 28. 90 angular degree deflection from (27) to
• 29. Exit to the tub, not shown as before. (25 - 29) can be adapted to the respective tub edge inclination, not further shown is also a (29) aerator-like sieve or grille, as well as a tub-side cover that also makes it impossible to lock (29).
• 30. Is the outer diameter of the end of the suction tube, which is the docking point for this. (10), which, like the positions (26-29), as shown here, is a molded part with (23), see. b. Fig. 1d, a e.g. on
• 31. inserted in the coupling point in the cover (23), e.g. also NHA ring (or a sealing element applied at 30)
• 32. receiving shaft for gear rack, or Bowden cable for OPEN / CLOSED tub plug; the connection thread, to a certain extent on, or here at least part of the drain head Kpl., for connecting the flexible pressure hose for the mixed water supply is also not shown. As before the connecting thread are, according to the design, please cut BB Fig. 1d, the nozzle 1, the baffle plate (5), which could theoretically also be omitted, the re-entry hole (8), with (9, 11, 12) and so also (30) part of the drain head (16) Kpl., here it is particularly important that the very precise alignment of the lines of symmetry (3 and 7) is always given.
• 33. Tile facing, or apron, of the bathtub (21)
• 34.Bend on the baffle plate (5)
  (Figure 1e)
• 35. second siphon, e.g. B. parallel to
• 36. Main siphon of the overflow and waste set
• 37. drip tray
• 38. rejection of (37) and ventilation grille.

Figures 2a, b, c and d
39. Additional splash water collecting funnel, Figure 2d see item (54) control cover for the free flow path (2 ') and nozzle', or for the discharge funnel (14 '), see also item 54

Figure 3

• 40th is the space between the nozzle (1) and baffle plate (5), or bore (4)
• 41st is the one below. (40) formed space,
• 42. is the discharge through the overflow hole (20) from the room (40),
• 43. is the analog half of the crescent-shaped discharge through the overflow hole (20), here half, or the pipe for discharging the bath water stowed in the space (41) via the bore (8) (see FIG. 1 c).

• 44. (64) Andichtstelle Heiß-
• 45. (65) Kalt- und
• 46. (66) Mischwasser
• 47. Einstellzapfen, hier wird der "Einhebel" für die Mischer-Kartusche befestigt,
• 48. nicht serienmäßiges Kartuschen-Gehäuse
• 49. hier mit an vorst. (48) angespritzter Verkapselung (49) der Kartuschen-Andichtung zur Aufnahme des O-Ringes (61) analog den O-Ringen (122 und 131) vorst. genannter Anmeldung, in Fig. 4b ist die Verkapselung als gesondertes Teil (59) dargestellt. An das Kartuschen-Gehäuse (48) ist auch, vorzugsweise angespritzt, die
• 50. Einleitung für das Mischwasser, durch das Überlaufloch (20) der Badewanne in diese (analog zu hier bitte Fig. 1: 10, 26, 27, 28, 29), ebenfalls vorzugsweise ein Teil mit dem Kartuschen-Gehäuse (48) ist auch der Zugangs-Deckel (23'), mit der Kupplungsstelle (31').

Figure 4a, b
(dash-dotted in Figure 4a, sb also Figure 5a) Connection diagram of a hot and cold water mixer cartridge:

• 44. (64) sealing point hot
• 45. (65) Cold and
• 46. (66) Mixed water
• 47. adjusting pin, here the "single lever" for the mixer cartridge is attached,
• 48. Cartridge housing not standard
• 49. here with an vorst. (48) molded encapsulation (49) of the cartridge seal for receiving the O-ring (61) analogous to the O-rings (122 and 131). mentioned application, in Fig. 4b the encapsulation is shown as a separate part (59). The cartridge housing (48) is also, preferably injection molded, the
• 50. Introduction for the mixed water, through the overflow hole (20) of the bathtub in this (analog to here, please Fig. 1: 10, 26, 27, 28, 29), is also preferably a part with the cartridge housing (48) also the access cover (23 ') with the coupling point (31').

• 51. wannenseitiger Befestigungsring für (16°) zumindest unten,
• 52. bandartige Besfestigung zum Verspannen (16°, 17, 51), um bei mittels der
• 53. Imbussschraube (Schlitz im Band (52) für Imbussschlüßel) gespanntem Band (52) die Kartusche (48, 50, 23') aus (24 und 30) herausziehen und durch das Überlaufloch (20) zur Wanne (21) hin entnehmen zu können.
• 55. Kanäle für Wasserführung zur und von der Heiß- und Kaltwasser-Mischer-Kartusche (48 und 58, 44, 45, 46)

(Figure 4b)

• 51. tub-side fastening ring for (16 °) at least below,
• 52nd band-like fastening for bracing (16 °, 17, 51) in order by means of
• 53. Allen screw (slot in the band (52) for Allen key) tensioned band (52) pull the cartridge (48, 50, 23 ') out of (24 and 30) and remove through the overflow hole (20) to the tub (21) can.
• 55. Channels for water supply to and from the hot and cold water mixer cartridge (48 and 58, 44, 45, 46)

(Figure 2d)
54. Shows in Figure 2d a cover (54) sealed with 2 times with A-rings in (16 °°°) and to (58 or 66 °°°), on which (39, 8 °°°, 12 ° °° and 9 °°°)

Figures 5a, b and c

• 56. Mini-control funnel for "dripping water tap", or improperly switched-off mixer cartridge, which is expected to be required when the soil flows into the ground. See s. b. Figure 9 Additional application 19515959.4.
• 57. rejection tube from vorst. (56), through the overflow hole (20)
• 58. here, contrary to (48), standard mixer cartridge housing and slid on
• 59. Encapsulation ring with
• 60. radial sealing O-ring according to (58)
• 61st and Velcro O-ring to the cartridge sealing surface at (44, 45, 46) in the drain head (16 °); the tube for the discharge from the encapsulation space (73) is not shown, please refer to above. Note positions (134 and 135) Fig. 2 and O-ring (122, 139) Figures 1d and e before. Registration.

• 62. ist das Gehäuse, anstelle des Ablaufkopfes (16°) vorst. Fig. 4b und (16°°) vorst. Fig. 5b, hier im Schnitt BB noch dargestellt ohne, s. b. Fig. 5a, kommunizierende Rohre für den Überlauf am Ablaufloch, dieses Gehäuse 62 hat keine Überlauffunktionen mehr und kann sich so nur mit
• 63. Streben zu einem
• 64. Ring, der wie die Streben (63) Bestandteil des Gehäuses (62) ist auch über einen Dichtrings (17) ähnlichen ausgleichenden Gummiring zur Badewannenrückseite abstützen, bzw. das Gehäuse (62, 63, 64) ist dort sicher ähnlich wie aus vorst. Fig. 4b zu ersehen an der Wanne befestigt, hierzu s. b. auch Ring (51)! Das Gehäuse beinhaltet weiter, wie vorst. die Kanäle nach und von der Kartuschen (58)-Andichtstelle (44, 45, 46) und die Bauteile der Absicherung, hier jedoch anschließend an das Saugröhrchen (9) mit der Ableitung (71), anstelle in Fig. 1a, b, c, d (10), zum Boden-Zufluß;
• 65. ist der Bund am Gehäuse (62), z.B. zum Einschrauben des
• 66. Befestigungsteiles für die Mischer-Kartusche (58),
• 67. ist die Zier-Abdeckung des bisher sogenannten Überlaufloches (20),
• 68. Andichtbund an (67) zum Anschluß an (66),
• 69. ist die Durchführung für den Zapfen (47) der Mischer-Kartusche (58),
• 70. Zapfen(47)-Achse (Radius-Drehpunkt). Wie auch unter Fig. 1d der hier vorst. immer sog. Vorst. Anmeldung EPA 0671514 A2, bzw. P4439050.5 ausführlich beschrieben, ist die Überlegung des DVGW, daß Undichtigkeiten bei vorst. (44, 45 und 46), also der Mischer-Kartuschen-Andichtung, in der Wanne (21) sichtbar werden müssen und kein Leckwasser unbemerkt z. B. in den Trichter (14), in einen Ablaufkopf, in ein Überlaufrohr (18) oder in den Raum hinter der Badewanne (21/33) abfließen kann. Es könnte die Innenwand von (66), zumindest unten, so ausgeführt sein, daß alles eindringende Badewannenwasser immer wieder herauslaufen kann. Anbieten wird sich die Zapfen-Durchführung (69) teilabzudichten (Prinzip ähnlich Einbebel-Mischer) und zwar so, daß kein druckloses Badewannenwasser eindringen, unter Systemdruck stehendes Wasser einer undichten Kartuschen-Andichtung (64, 65, 66), wie auch eines defekter Mischkammer-O-Ring in der Kartusche, zur Wanne (21) hin, zur Sichtbarmachung, herausspritzen kann.
• 71. Ableitung vom Saugröhrchen (9) zum Boden-Zufluß
• 72. _"Schnüffel"-Ventil
• 73. Verkapselungsraum

(Figure 5c)

• 62. is the housing, instead of the drain head (16 °). Fig. 4b and (16 °°) vorst. Fig. 5b, shown here in section BB still without, sb Fig. 5a, communicating pipes for the overflow at the drain hole, this housing 62 no longer has overflow functions and can only be used with it
• 63. Strive for one
• 64. Ring, which like the struts (63) is part of the housing (62) is also supported by a sealing ring (17) similar to the compensating rubber ring to the back of the bathtub, or the housing (62, 63, 64) is certainly similar to that from above . Fig. 4b can be seen attached to the tub, sb also ring (51)! The housing further includes, as before. the channels to and from the cartridge (58) sealing point (44, 45, 46) and the components of the fuse, but here following the suction tube (9) with the discharge line (71) instead of in Fig. 1a, b, c , d (10), to the bottom inflow;
• 65. is the collar on the housing (62), eg for screwing in the
• 66. fastening part for the mixer cartridge (58),
• 67. is the decorative cover of the so-called overflow hole (20),
• 68. sealing collar at (67) for connection to (66),
• 69. is the bushing for the pin (47) of the mixer cartridge (58),
• 70. Pin (47) axis (radius pivot point). As also shown in Fig. 1d of the present. always so-called Vorst. Application EPA 0671514 A2, or P4439050.5 described in detail, is the DVGW's consideration that leaks at vorst. (44, 45 and 46), ie the mixer-cartridge seal, must be visible in the tub (21) and no leakage water goes unnoticed z. B. in the funnel (14), in a drain head, in an overflow pipe (18) or in the space behind the bathtub (21/33). The inner wall of (66), at least below, could be designed in such a way that all penetrating bath water can run out again and again. The spigot bushing (69) will be partially sealed (principle similar to single-lever mixer) in such a way that no unpressurized bath water can enter, water under system pressure, a leaking cartridge seal (64, 65, 66) and a defective mixing chamber -O-ring in the cartridge, towards the tub (21), for visualization, can splash out.
• 71. Derivation from the suction tube (9) to the bottom inflow
• 72. "Sniffer _" valve
• 73. Encapsulation room

Further refinements of the invention

Figures 6, a, b, c, d e and f

• 74. is the drain and here also overflow hole D2 on the tub (21) floor,
• 75. is the upper end of the communicating tube of the overflow at the drain hole (74),
• 76th is the upper end of the drain pipe from vorst. (75); both pipe ends (75 and 76) are such that these through the, then only so-called, overflow hole (20) after removal of the
• 77. Cap with ventilation or
• 78. maintenance cover,
  are accessible;
• 79.
• 80. removable cover of the drain and overflow hole (74),
• 81. circular cross-section for the bath water; Above the circular cross section (81) on top of the cover (80)
• 82. Bathtub inlet (floor inflow), the actual inlet (inlet) of the
• 83. Exit cross section of the vertical, upwards, through the drain and here also overflow hole (74) of the bathtub (21)
• 84. tube; at (83) is the
• 85. backflow preventer, here e.g. made of brass, which closes here only by its own weight; by means of
• 86. Ribs is the top one
• 87. Coverage from (82) or (85) to (80) or
• 88. on the lower walls arranged in a star shape, the mixed water deflecting somewhat upwards in an arc
• 89. the outlet ducts are attached (e.g. ultrasonically welded); the tube (84) is a part with (80), this tube (84) has (83) opposite the
• 90th outlet, the sealing seat for the top
• 91. Stopper, such as a hammer ball, or reversed strand ventilation, but here
• 92. with spring, the
• 93. is suspended from the holder in the tube (84). The spring (92) is only so strong that it opens against the accumulation height: tub rim (22) to the tub bottom when the mixer cartridge (58), (91) is parked,
• 94. thus the horizontal route, with
• 95. negative horizontal transition according to (84) can leak; the riser tube (84) also runs out. The inlet line (94, 95, 84) is thus ventilated between the bore (8) of the free flow path (2) and the outlet (90, 74).
• 96. Down to the tub plug,
• 97. or its _" fill stop" float (EPA 0446177 B1) has the outlet (90)
• 98. Sealing seat to the _" fill stop" float (97). The "fill stop" float (97), contrary to the execution of the above application, because of the tube (84)
• 99. the recess.

• 100. radiale Rillen, damit, trotz vorst. Umlenkungen, vom verschlossenen Rückflußverhinderer (85) jegliches Rest- und Reinigungswasser (Schlupfdusche) abfließen kann;
• 101. ist das von der Wannen(21)-Seite her eingeschraubte Befestigungsteil für die bekannte Einheit. Die konstruktive Ausbildung der Andichtung der Mischwasserzuführ an das bekannte Unterteil, bzw. an vorst. (101) ist nicht weiter dargestellt. In jedem Fall muß die
• 102. Eintrittsbohrung in das Röhrchen (84), an der herausnehmbaren Abdeckung (80) im eingeschobenen Zustand an (95) radial andichten. Dies könnte z.B. mittels eines dann radial angepreßten Flansch-O-Ringes, wie dies von dem Ingolstadt Rohrunterbrecher, zum Herausnehmen des in Kunststoff ausgeführten A2 aus dessen MS-Gehäuse bekannt ist, ausgeführt werden; auch zwei, ober und unterhalb der Einmündung (95), radial an der Innenbohrung von (101) dichtende O-Ringe (auch evtl. nur Kunststoffsitze) sind möglich.
• 103. Verbindungsraum zwischen Ab- und hier auch Überlaufloch zur kommunizierenden Röhre (75) (oberes Ende) des Überlaufes; dieser Raum wird bei Bad EIN mit dem Stopfen (96) zum Siphon (36) verschlossen.
• 104. In Figur 2 Umlenkblech.

In the channels (89), or in their arcuate deflections are somewhat upwards

• 100th radial grooves, so, despite the front. Deflections, from the closed backflow preventer (85) any residual and cleaning water (slip shower) can drain;
• 101. is the fastening part screwed in from the tub (21) side for the known unit. The constructive design of the sealing of the mixed water supply to the known lower part, or to vorst. (101) is not shown any further. In any case, the
• 102. Seal the inlet hole in the tube (84) radially on the removable cover (80) when inserted (95). This could be done, for example, by means of a then radially pressed flange O-ring, as is known from the Ingolstadt pipe interrupter, for removing the A2 made of plastic from its MS housing; It is also possible to have two O-rings (above and below the junction (95)) that seal radially at the inner bore of (101) (also possibly only plastic seats).
• 103. Connection space between the discharge and here also the overflow hole to the communicating tube (75) (upper end) of the overflow; this space is closed with a plug (96) to form a siphon (36).
• 104. In Figure 2 baffle.

Claims (14)

Combined bath tub inlet and overflow set, optionally also with an integrated one, also at the overflow hole (DIN EN 232: D ₁ = 52 $\genfrac{}{}{0ex}{}{\text{+3}}{\text{-2}}$

) the tub-arranged fitting for mixing hot and cold water, with the possibility of adjusting the amount of mixed water and preferably switching from tub to shower, with a mixed water supply to the bathtub below its upper edge, characterized in that its protection (1, 2, 3, 7, 8, 9, 30, 31, 23) against sucking back (DIN 1988 part 4, SVGW / TPW 126, 135 and CEN / TC 164 N. 453), which are also arranged below the level of the upper edge of the bathtub (22) Above an outlet funnel (14, 34, 15), preferably laterally offset, behind or next to the overflow hole (20) between the rear of the bathtub (21) and its tile covering (33), in the atmosphere (22, 33), free flow path (2) of preferably at least 20 millimeters, in principle like a pipe interrupter type A1, without a moving part, the mixed water supply nozzle (1) and the re-entry or discharge bore (8, 11, 12, 39, 9) , at the end of the free flow path (28), see above are set up that when tiling back or sucking back the water from the filled bath tub (21), via the re-entry or discharge bore (8, 11, 12, 39, 9), the feed nozzle (1) outside the refluxing Water flow lies (Figures 1a, b, c, d and 2a, b, c, d). Set according to claim 1, characterized in that the axes (3, 7) of the supply nozzle (1) and re-entry or discharge bore (8) corresponding to the flow direction of the water are angled to one another, preferably at an angle of 30 ° (FIGS. 1a, b, c, d and 2a, b, c, d). Combined bath tub inlet and overflow set according to preceding claims 1 and 2, characterized in that the components for protection against back suction: nozzle (1), baffle plate (5, 34), with the through hole (4), free flow path (2 ) and re-entry bore (8, 11, 12, 39, 9, 30), laterally offset, arranged behind or next to the overflow hole (20), an integral part of the drain head (16) are complete, the overflow space (19, 18) in Drain head (16) through the access cover (23, 24, 30, 31) to the space between the bathtubs (21) rear and their tile facing (33), in which the free flow section (2) is closed and the discharge (8, 30) and introduction (31, 10, 26, 27, 28, 29) of the mixed water through the overflow hole (20 ) of the bath tub (21) into this, via the hydraulic coupling point (30, 31), suction tube end (9) after discharge tubes (10, 26, 27, 28, 29), which are parts of the access cover (23), takes place ( Figures 1a, b, c and d). Set, according to one of the preceding claims, with an access cover, with a hydraulic coupling point, which hermetically seals the overflow space in a drain head, up to a diameter of approx. Max. 9 millimeters of the re-entry bore, which is behind a free flow path closes off from the space between the rear of the bathtub and its tile covering, characterized in that the free flow path (1 ', 2', 3 ') and thus the mixed water, via the re-entry hole (8', 11, 12, 39) and the suction tube ( 9 '), which is part of the access cover (23 "), is directly introduced into the suction tube (9') through the overflow hole (20) of the bathtub (21) with its coupling point (30 ', 31') ( Figures 2a, b, c and d). Set according to one of the preceding claims, characterized in that it is integrated in a fitting for mixing hot and cold water, which is also arranged at the overflow hole (20) of the bath tub (21), with the possibility of adjusting the amount of mixed water and preferably switching from bath tub to shower (Figures 2d , 4a, b, 5a, b, c). Combined bath tub overflow and waste set with integrated fitting, also located at the overflow hole of the bath tub, for mixing hot and cold water, with the possibility of adjusting the amount of mixed water and preferably switching from bath tub to shower, as in EPA0671514 or P4439050.5 and 19515959.4, but here with protection against sucking back according to the preceding claims, characterized in that its, behind the overflow hole (20) integrated in the drain head (16 °), standard hot and cold water mixer cartridge (44, 45, 46 , 47) in a special plastic housing (48, 49) is inserted and preferably also injection molded onto the cartridge housing, or as far as is required by injection technology, in some cases ultrasonically welded to one another, the access cover (23 ') with its hydraulic coupling point (31') on the suction tube (9, 30 ) or to the free flow path (2) and the inlet (50) for the mixed water (16), through the overflow hole (20) of the bathtub (21) into this (Figures 4a and b). Behind the overflow hole D ₁ , under the upper bath rim, preferably laterally offset, a free flow path arranged according to one of the preceding claims, characterized in that the mixed water supply (71) on the floor (74), or in the region thereof, of the bath tub (21) secured against sucking back and there is preferably a 300 mm long vertical section (94) which can dry out like in a pipe separator installation type 3 DIN 1966 part 4 in order to prevent the migration of bacteria (Figures 5a, b and 6a - f). Bathtub fitting, according to one of the preceding claims 5, 6 and 7, but not with a single-lever mixer cartridge, but constructed, with the exception of the protection and its arrangement, as can be seen from FIGS. 4a and 4a2 of the application EPA 0671514 A2 and there described, in particular claim 12, characterized in that the fitting has an automatic hot water let-off device with a liquid expansion system (204, 200, 207, 211). By means of a free flow section according to one of the preceding claims, secured mixed water inlet into the tub arranged below the upper bathing rim, as can be seen from FIGS. 1a, b, c and 2a, b, c, characterized in that it has a bath tub Overflow is combined by means of a communicating tube (75, 76), with which the overflow space (19, 18) is dispensed with and thus sealed by the overflow hole (20), which is then sealed with a decorative cover, similar (67), then only, sealed in the decorative cover (67), the axis for actuating the gear (32) for the tub plug (96) OPEN / CLOSE and the mixed water inlet (27 or possibly 9 ') into the Bathtub (21) are guided (Figures 5a and c). Combined bath tub overflow and drainage tap with integrated tap, also located at the overflow hole of the tub, for mixing hot and cold water, with the possibility of adjusting the amount of mixed water and preferably switching from tub to shower, as in EPA0671514A2 or P4439050.5 and 19515959.4, but here with protection against back suction according to claims 1 and 2, characterized in that the space behind the, then only so-called overflow hole (20), the maintenance of the sub-assemblies to the left and right next to it, drain funnels (14) and tubes ( 75, 76) with maintenance cover (78), except for the installation of a bathtub fitting, preferably with a hot and cold water mixer cartridge, thermostatic cartridge (58, 55, 62, 63, 64 , 65, 66, 67, 68, 69, 57), is available (Figures 5a, b, c and 6a-f). Bathtub fitting, according to the preceding claim 10 but not with a single-lever mixer cartridge, but, constructed as can be seen from FIGS. 4a and 4a2 of the application EPA0671514A2 and described there, characterized in that the fitting has a hot water drainage Automatic, the sensor (211) of the fluid expansion system is then preferably inserted in the communicating tube (75, 103), as can be seen from FIG. 4b EPA0671514A2 (FIGS. 4a, 4a2 and 4b EPA0671514A2 and here 5a, b, c and 6a - f). Siphon (35) for the discharge pipe (15) of the discharge funnel (14) for protection against back suction according to claim 1, characterized in that this (35) each time the bathtub (21) is used by targeted spray water from the free flow path (1, 2 , 8) is watered to avoid drying out. Pipe interrupter, similar to type A1, without a moving part, DIN 1988 part 4, characterized in that the nozzle (1) with the free 20 millimeter flow path (2) and the re-entry or discharge bore (8, 11, 12, 39), on End of the free flow path (2, 8), lie in two lines of symmetry (3, 7), which are angled at an angle of approximately 30 degrees to each other (Figures 1a, b and c). Pipe separator, similar to installation type 3, EA3, DIN 1988 part 4, according to the preceding claims 1, 2 and 13 and claim 5, DE 4409104 Al, characterized in that at least 300 for the discharge of its horizontal path (94, 95, 84) Millimeters of the backflow preventer (85) and the stopper, such as the aggregate ball, or reversed strand ventilation (94) are arranged (Figures b, a, b, c, d, e and f).

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