EP3567170A1 - Drainage fitting for a shower or bath tub - Google Patents

Abstract

The invention relates to a drain fitting (1) for a bath or shower tray, with a housing (2) having an inlet opening (3) and a drain connection (2.2), the housing having an arm-shaped projecting drain channel (2.1), at the end of which the Drain connection (2.2) is arranged, wherein the drainage channel (2.1) has a wave-shaped, an overflow edge (2.5) defining channel section (2.11) to form an odor trap, and with a seal (7) surrounding the inlet opening (3), which is a Has system on the underside of a tub bottom certain sealing surface (7.1). So that such a drain fitting has a low overall height for flush-to-floor installation of shower trays, can be cleaned comparatively easily and still offers a sufficient water seal for a reliable odor trap and a drainage capacity that conforms to standards, the invention provides that a drain fitting in the functional position above the overflow edge ( 2.5) located housing section (2.12) of the drainage channel (2.1) protrudes above the sealing surface (7.1), the shortest horizontal distance (A _K) of the highest point of the overflow edge (2.5) from the circumferential inner surface of the Inlet opening (3) is at least 0.9 times, preferably at least 1.1 times, particularly preferably at least 1.2 times the horizontal inside width (D) of the inlet opening (3).

Description

The invention relates to a drain fitting for a shower or bath tub, with a housing having an inlet opening and a drain neck, wherein the housing has an arm-shaped projecting drain channel, at the end of the outlet nozzle is arranged, wherein the drainage channel for forming a trap odor a wave-shaped, Having a overflow edge defining channel portion, and with a surrounding the inlet opening seal, which has a particular intended to bear against the underside of a trough bottom sealing surface.

Such a drain fitting for shower trays is from the DE 10 2006 053 756 A1 known. The housing of the drain fitting has an accessible from the inlet opening forth interior, which is bounded by integrally connected to the housing boundary walls. Below the interior, which ends at a lower edge, a water guide is formed as a drainage channel, which leads from a bottom of the housing first upwards and there again in a U-shaped arc a little way down and then horizontally outwards. The housing having the water guide is shaped so that the water flow seen in the flow direction always has a rectangular cross-section. The water supply is closed liquid-tight by a separately manufactured front lid. The lid is welded to this with the water supply having housing part. At the end of the water guide a transition piece is welded, which serves to connect the rectangular in cross-section water supply to a circular cross-section pipe. The transition piece represents the actual discharge nozzle of the housing. The housing of this drain fitting is thus composed of three parts.

For the construction and renovation of bathrooms nowadays low sanitary drain fittings are often required. Although conventional drain fittings for shower trays offer a standard drainage performance, but due to their height can not meet the special requirements for a flat design for low installation spaces regularly. So it is hardly possible with conventional drain fittings due to their height to realize a floor-level installation of shower trays. In addition, there is sometimes the problem of cleaning in shower and bathtub drains when they are blocked by hair or other deposits. The cleaning of shower drains is often possible only with increased effort, for example by disassembly of dip tubes or plugs to allow or facilitate the introduction of cleaning spirals or other cleaning tools.

The from the DE 10 2006 053 756 A1 Although known drain fitting offers a relatively high drainage performance, but due to its height for flush-mounted shower trays little or not suitable. In addition, this drain fitting can be cleaned only with increased effort due to their narrow water flow in the event of constipation.

Based on this, the present invention seeks to provide a drain fitting of the type mentioned above, which has a low overall height for flush mounting of shower trays, can be cleaned comparatively easy and yet provides a sufficient water seal height for a reliable odor trap and standard drainage performance.

This object is achieved by a drain fitting with the features specified in claim 1. Preferred and advantageous embodiments of the drain fitting according to the invention are specified in the subclaims.

The drain fitting according to the invention is characterized in that a in functional position of the drain fitting located above the overflow edge Housing portion of the drain passage, the sealing surface surmounted above, wherein the shortest horizontal distance of the highest point of the overflow edge of the circumferential inner surface of the inlet opening at least 0.9 times, preferably at least 1.1 times, more preferably at least 1.2 times the horizontal inner width of the inlet opening is.

The inlet opening can also be referred to as an inlet opening.

If the inlet opening is substantially circular or circular-cylindrical, then the horizontal inner width of the inlet opening corresponds to the inner diameter of the inlet opening. If, by contrast, the inlet opening is essentially semicircular, oval or elliptical, for example, the horizontal inner width of the inlet opening corresponds to the smallest horizontal inner width of the inlet opening.

If the inlet opening is substantially circular-cylindrical, then the shortest horizontal distance of the highest point of the overflow edge of the drainage fitting according to the invention can also be defined with respect to the vertical center axis of the inlet opening. In this case, the shortest horizontal distance of the highest point of the overflow edge from the central axis of the substantially circular cylindrical inlet opening is at least 1.5 times, preferably at least 1.6 times, more preferably at least 1.8 times the horizontal inner width or the inner diameter of the inlet opening.

The present invention utilizes the fact that baths and shower trays at their bottom drain opening normally have a peripheral, opposite the tub bottom bottom protruding down edge region. The invention is based on the idea to use the available space under the tub floor in its height and in its width for the drain fitting ideal while fluid as possible in the drain fitting as little as possible Direction changes and preferably to achieve the lowest possible cross-sectional changes.

Characterized in that the shortest horizontal distance of the highest point of the overflow edge of the circumferential inner surface of the inlet opening is at least 0.9 times, preferably at least 1.1 times, more preferably at least 1.2 times the horizontal inner width of the inlet opening, can be achieved a wave-shaped drainage channel, which has a relatively large or standard locking water level relatively large deflection radii and thus no sharp changes in direction. As a result, the introduction of a cleaning spiral in the wavy flow channel is greatly facilitated.

The odor trap of the drainage device according to the invention is executed in a preferred embodiment of the invention dip tube. In this case, no removable, separately manufactured immersion tube is used in the drain fitting, which forms part of a trap in conventional drain fittings of shower trays. By eliminating the dip tube and thus not required disassembly of the dip tube in the event of cleaning the drain fitting not only the effort required for cleaning is reduced, it can also achieve a cost advantage by eliminating the dip tube production.

A further advantageous embodiment of the invention is characterized in that the overflow edge is at the same level or higher than a flange of the housing carrying the seal. As a result, a further reduction in the overall height of the drain fitting can be achieved while ensuring a sufficient sealing water level.

According to an alternative embodiment of the drain fitting according to the invention, the overflow edge may be deeper than a flange of the housing carrying the seal, wherein the vertical distance of the overflow edge from the top of the seal carrying flange is not more than 8 mm, preferably not more than 5 mm. Also, this can be achieved by ensuring a sufficient water seal height, a further reduction in the height of the drain fitting.

A further advantageous embodiment of the invention provides that viewed in longitudinal section of the wavy channel portion has a concave bottom portion whose radius of curvature is greater than the height of the housing. As a result of this configuration, in particular the relatively large radius of curvature of the concave bottom section, insertion of a cleaning spiral into the wave-shaped outflow channel is particularly facilitated.

According to a further advantageous embodiment of the invention, the wavy channel portion in longitudinal section considered a convex bottom portion which extends at least to the overflow edge and the radius of curvature is greater than half the height of the housing. This embodiment also contributes to a particularly easy insertion of a cleaning spiral in the wave-shaped drainage channel.

A further embodiment of the invention provides that the housing of the drain fitting is composed of a lower housing part and an upper housing part, wherein the lower housing part and the upper housing part are liquid-tightly connected to each other by a peripheral connecting seam, and wherein the connecting seam on opposite longitudinal sides of the wavy formed channel portion of Drain channel runs. This embodiment is favorable in terms of manufacturing technology. The housing parts can for example be made of plastic by injection molding. The peripheral connecting seam between the lower housing part and upper housing part is preferably designed as a weld.

In this context, a further embodiment of the invention is that the outlet connection for connecting a circular cross-section executed drain pipe and formed integrally with the lower housing part. The housing of the drain fitting according to the invention can thus be composed of essentially only two housing parts. The drain fitting according to the invention is thus characterized by a very small number of components. This design reduces the manufacturing costs and the risk of leaking joints, especially leaking welds.

A further advantageous embodiment of the invention is characterized in that the width of the drainage channel seen in the direction of water drainage decreases between the overflow edge and the outlet nozzle. The width of the drainage channel thus tapers from or to the overflow edge in the direction of the outlet nozzle. As a result, paragraphs or edges that can interfere with the introduction of a cleaning spiral in the outlet pipe and a pipe connected thereto avoided.

The corrugated drainage channel or channel section preferably has substantially a uniform width (inner width) from its beginning below the inlet opening to the overflow edge. This makes it possible to use the available space under a shower tray, especially a floor to be installed shower tray ideal.

For a high or standard drainage performance of the drain fitting, it is advantageous if according to a further embodiment of the invention, the measured orthogonal to the channel base width of the flow channel after the overflow edge in the direction of the outlet nozzle increases.

With regard to a high or standard drain capacity of the drain fitting, it is also advantageous if the inlet opening of the housing is defined by a Gehäuseinnenwandung according to a further embodiment, which is formed substantially circular cylindrical or circular arc-shaped wall sections, wherein the arcuate wall sections are connected to each other via radially inwardly projecting wall sections, in which at least portions of threaded sleeves are accommodated. The threaded sleeves serve to attach the drain fitting to the floor drain opening of a shower or bath. The aforementioned embodiment of the inlet opening delimiting the housing inner wall allows an ideal degree of coverage with the floor drain opening of the shower or bath tub and thus with the material-saving construction of the drain fitting a high or standard-compliant drainage performance of the same. In this context, a further advantageous embodiment provides that the radially inwardly projecting wall sections are aligned with respect to the outside of the housing radially projecting wall sections.

According to a further advantageous embodiment of the invention, the housing has a bottom surface facing the inlet opening, inclined in the direction of the outlet channel. This embodiment promotes a high drainage performance of the drain fitting, improves the reliability of the odor trap and facilitates the insertion of a cleaning spiral in the drainage channel.

In order to realize the floor-level installation of a shower tray in a simple manner, it is advantageous if the drainage device according to the invention is designed such that the distance between the bottom of its housing and to the plant to the underside of a trough bottom determined sealing surface (mounted on the bottom of the tub ) is less than 75 mm, preferably less than 70 mm, more preferably less than 60 mm. In order to ideally use the available space in height, a preferred embodiment of the invention provides that the housing section of the drainage channel located above the overflow edge projects beyond the sealing surface by at least 10 mm.

Yet another embodiment of the invention is characterized in that the sealing surface intended to bear against the underside of a trough bottom is provided with an adapter ring having a vertical thickness of at least 5 mm, preferably at least 10 mm. This embodiment allows the assembly of the drainage device according to the invention even in such shower or baths, in which a circumferential at its bottom drain opening, with respect to the bottom bottom of the tub downwardly projecting edge region protrudes downwards only with a relatively small distance from the bottom of the tub bottom.

Fig. 1 bis 3

eine erfindungsgemäße Ablaufarmatur mit einem am Ablaufstutzen angeschlossenen Ablaufrohrbogen in Längsseitenansicht, in Draufsicht und in einer perspektivischen Darstellung;

Fig. 4

die Ablaufarmatur aus Fig. 1 ohne Ablaufrohrbogen, wobei ein dem Ablaufstutzen zugeordneter Dichtring sowie eine Überwurfmutter getrennt dargestellt sind;

Fig. 5

die Ablaufarmatur aus Fig. 1 mit dem daran angeschlossenen Ablaufrohrbogen in einer vertikalen Längsschnittansicht;

Fig. 6 bis 8

ein weiteres Ausführungsbeispiel der erfindungsgemäßen Ablaufarmatur mit einem am Ablaufstutzen angeschlossenen Ablaufrohrbogen in Längsseitenansicht, in Draufsicht und in einer perspektivischen Darstellung;

Fig. 9

die Ablaufarmatur aus Fig. 6 ohne Ablaufrohrbogen, wobei ein dem Ablaufstutzen zugeordneter Dichtring sowie eine Überwurfmutter getrennt dargestellt sind; und

Fig. 10

die Ablaufarmatur aus Fig. 6 mit dem daran angeschlossenen Ablaufrohrbogen in einer vertikalen Längsschnittansicht.

The invention will be explained in more detail with reference to an exemplary embodiments illustrative drawing. Show it:

Fig. 1 to 3

an inventive drain fitting with a drain pipe connected to the drain pipe bend in longitudinal side view, in plan view and in a perspective view;

Fig. 4

the drain fitting off Fig. 1 without drainpipe, with a drain pipe associated with the sealing ring and a union nut are shown separately;

Fig. 5

the drain fitting off Fig. 1 with the attached drainage pipe bend in a vertical longitudinal sectional view;

Fig. 6 to 8

a further embodiment of the drain fitting according to the invention with a drain pipe connected to the drain pipe bend in longitudinal side view, in plan view and in a perspective view;

Fig. 9

the drain fitting off Fig. 6 without drainpipe, with a drain pipe associated with the sealing ring and a union nut are shown separately; and

Fig. 10

the drain fitting off Fig. 6 with the attached drainpipe bend in a vertical longitudinal section view.

The drain fittings 1, 1 'shown in the drawing are intended for mounting on a circular floor drain opening of a bath or shower tray. The drain fittings 1, 1 'are suitable for bathtubs and shower trays, which offer little space in the mounted state under the tub floor for the arrangement of a set to be established at the floor drain opening drain fitting. This applies in particular to floor-level shower trays.

The edge region of the trough bottom surrounding the floor drain opening of a bath or shower tray usually protrudes downward with respect to the underside of the trough bottom, wherein a conically formed bottom portion continuously merges into a substantially horizontal bottom portion which delimits the floor drain opening.

The in the FIGS. 1 to 5 shown drain fitting 1 has a housing 2 with an inlet opening 3 and an arm-shaped protruding drain channel 2.1, at the end of a drain pipe 2.2 is arranged. The outlet connection 2.2 is designed to connect a circular cross-section having drain pipe 4, for example, a pipe bend. The outlet nozzle 2.2 is preferably provided with a sealing ring 5 and a union nut 6 and has for this purpose an external thread 2.3. The drain pipe 4 is inserted into the outlet pipe 2.2 and connected liquid-tight with this with the interposition of the sealing ring 5 by means of the union nut 6. Furthermore, the drain fitting 1 includes a seal 7 surrounding the inlet opening 3, which has a sealing surface 7.1 intended to bear against the underside of the trough bottom. In the assembled state of the drain fitting 1, the annular seal 7 is sealingly against the underside of the substantially horizontal, the bottom drain opening of the tub bottom limiting trough bottom portion. The seal 7 has an axial section or collar 7.2 and two thereof radially outwardly projecting flange-shaped sections 7.3, 7.4, wherein the lower section 7.3 to rest against the Bottom of the tub and the other section 7.4 is intended to rest against the inside of the tub.

To fix the drain fitting at the drain opening in the tub bottom of the inlet opening 3 of the housing 2 is associated with a conically shaped mounting ring 8. The mounting ring 8 is to be arranged on the inside of the tub and is preferably made of stainless steel. It has holes that serve to carry out the shafts of fastening screws 9. The housing inner wall 2.4 defining the inlet opening 3 is substantially circular-cylindrical or has three circular-arc-shaped wall sections 2.41, wherein these wall sections 2.41 are integrally connected to one another via radially inwardly projecting, substantially vertically extending wall sections 2.42. The wall regions 2.42 are in alignment with wall sections 2, 43 which protrude radially in relation to the outside of the housing 2 and which likewise run essentially vertically. In the area of the inwardly or outwardly projecting wall sections 2.42, 2.43 threaded sleeves 10 are introduced into the housing wall, in which the fastening screws 9 are screwed or are. In the embodiment, three metal threaded sleeves 10 are integrated in the housing 2 made of plastic, for example polypropylene, wherein the threaded sleeves 10 are evenly spaced from each other.

In order to form an odor trap by means of sealing water, the outlet channel 2.1 has a wave-shaped channel section 2.11 defining an overflow edge 2.5. The overflow edge 2.5 is higher than the lower edge 2.6 of the inlet opening 3 bounding Gehäuseinnenwandung 2.4, wherein the lower edge 2.6 of the Gehäuseinnenwandung the input opening of the drain channel 2.1 is limited to the top.

The drain fitting 1, 1 'is designed such that a in the functional position of the drain fitting 1, 1' located above the overflow edge 2.5 housing section 2.12 of the drain channel 2.1, the sealing surface 7.1 projects upwards (see in particular FIGS. 4, 5 . 9 and 10 ). The housing section 2.12 of the drainage channel located above the overflow edge 2.5 preferably projects beyond the sealing surface 7.1 by at least 10 mm, for example by an amount in the range of 10 to 13 mm. The overflow edge 2.5 is preferably at the same height or even higher than a seal 7 carrying flange 2.7 of the housing 2. The sealing water level in the FIGS. 1 to 5 shown drain fitting 1 is for example about 30 mm.

The wave-shaped drainage channel 2.1 is fluidically designed such that it has as few changes of direction and the smallest possible cross-sectional changes. For this purpose, the shortest horizontal distance A _{K of} the highest point of the overflow edge 2.5 of the circumferential inner surface of the inlet opening 3 is dimensioned comparatively large. The shortest horizontal distance A _{K of} the highest point of the overflow edge 2.5 of the circumferential inner surface of the inlet opening 3 is at least 0.9 times, preferably at least 1.1 times, more preferably at least 1.2 times the horizontal inner width of the inlet opening 3 amounts to.

In the embodiments shown in the drawing, the inlet opening 3 is formed substantially circular cylindrical. Thus, a shortest horizontal distance A _{KM of} the highest point of the overflow edge 2.5 of the drain fitting 1, 1 'according to the invention can also be defined in relation to the vertical center axis M of the inlet opening 3. In the illustrated embodiments, the shortest horizontal distance A _{KM of} the highest point of the overflow edge 2.5 from the center axis M of the inlet opening 3 more than 1.8 times, for example, about twice the inner diameter or the smallest horizontal inner width D of the inlet opening. 3 ,

Furthermore, it can be seen in the drawing that the wave-shaped drainage channel considered 2.1 in longitudinal section, in the region between the inlet opening 3 and the overflow edge 2.5, a concave bottom section 2.13, whose radius of curvature is greater than the height H _{1 of} the housing 2 of the drain fitting (please refer especially FIGS. 4, 5 and 9, 10 ). Connected to the concave bottom section 2.13 is a longitudinal section of the drainage channel, a convexly shaped channel bottom section 2.14, which extends at least to the overflow edge 2.5 or beyond, wherein the radius of curvature of the convex bottom portion 2.14 greater than half the height H _{1 of} the housing 2 of Drain fitting 1, 1 'is.

Along its length, starting from the substantially circular cylindrical inlet opening 3 up to the overflow edge 2.5, the outlet channel 2.1 has a substantially constant width B or inner width and a substantially constant width W ₁ , the latter orthogonal to the wavy channel base measure is (see in particular Fig. 2 . 5 and 7 . 10 ). Seen in the direction of water drainage, the width B of the drainage channel 2.1 decreases after the overflow edge 2.5 in the direction of the substantially circular-cylindrical outlet nozzle 2.2. The width B of the drain channel 2.1 thus tapers after the overflow edge 2.5 in the direction of the outlet nozzle 2.2. At the same time, the section W _{2 of} the drainage channel 2.1 measured orthogonally to the channel base area increases in this section of the drainage channel 2.1 upstream of the drainage nozzle ₂ , so that the internal cross-sectional surface of the drainage channel 2.1 barely or only slightly changes along the channel centerline between the overflow edge 2.5 and the outlet nozzle 2.2.

The housing 2 of the drain fitting 1, 1 'is composed of a housing lower part 2.8 and a housing upper part 2.9, which are connected to each other by a circumferential connecting seam 2.10, preferably a weld liquid-tight. The connecting seam 2.10 runs on the opposite longitudinal sides of the wavy formed channel section 2.11 of the drain channel 2.1. Above the drain neck 2.2, which is formed integrally with the housing lower part 2.8, the connecting seam 2.10 has a substantially rectilinear seam section 20. At the outlet end 2.2 of the opposite end of the housing 2, the connecting seam 2.10 a semicircular-shaped seam portion 21, while along the longitudinal sides of the wave-shaped flow channel 2.1 Run parallel to the contour and thus also has a wave-shaped course 22 on both long sides.

At least one reinforcing rib 2.81, 2.91 is provided on the underside of the lower housing part 2.8 and on the upper side of the upper housing part 2.9, which is formed in one piece with the lower housing part 2.8 or the upper housing part 2.9.

The in the FIGS. 6 to 10 shown drain fitting 1 'differs from that in the FIGS. 1 to 5 shown drain fitting 1 characterized in that the sealing water level is greater and here, for example, about 50 mm. Accordingly, the height of the drain fitting 1 'by about 20 mm higher than the height of the in the FIGS. 1 to 5 Furthermore, it can be seen that the bottom surface 24 of the interior of the housing facing the inlet opening 3 runs inclined in the direction of the outlet channel 2.1. The slope of this bottom surface 24, namely its inclination angle relative to the horizontal, for example, in the range of 12 ° to 18 °, in particular in the range of 14 ° to 16 °. Another difference compared to the one in the FIGS. 1 to 5 shown drain fitting 1 is that the overflow edge 2.5 in the water drain direction subsequent channel bottom portion 26 has a significantly greater slope and this section leads as a steep inclined surface 26.1 or inclined plane. The angle of inclination of the inclined surface 26.1 relative to the vertical is for example in the range of 10 ° to 18 °.

The distance A _{SM of} the end of the downcomer 2.2 from the central axis M of the inlet opening 3 is substantially equal in the two drainage valves 1, 1 'shown in the drawing and is for example about 225 mm. This is when in the FIGS. 6 to 10 shown drain fitting 1 ', which has a sealing water height of about 50 mm and the overflow edge 2.5 is slightly further away from the central axis M of the inlet opening 3 than in the drain fitting 1 according to Fig. 4 , especially reached by the overflow edge 2.5 subsequent steep inclined surface 26.1 of the channel bottom.

The distance H ₂ of the particular intended to bear against the underside of the tub bottom sealing surface 7.1 of the housing bottom is in the in the FIGS. 1 to 5 shown drain fitting 1 in the assembled state less than 60 mm, preferably less than 55 mm, for example, only about 48 mm. In the in the FIGS. 6 to 10 shown drain fitting 1 ', this distance H _{2 is} less than 75 mm, preferably less than 70 mm, for example, only about 68 mm.

The embodiment of the invention is not limited to the embodiments shown in the drawing. On the contrary, numerous variants are conceivable which make use of the invention disclosed in the appended claims, even if the designs deviate from those shown. Thus, for example, the particular intended for engagement with the underside of a tub bottom sealing surface 7.1 (not shown) with an adapter ring, which has a vertical thickness of at least 5 mm, preferably at least 10 mm.

Claims (16)

Discharge fitting (1, 1 ') for a shower or bathtub, with a an inlet opening (3) and a discharge nozzle (2.2) having housing (2), wherein the housing has an arm-shaped protruding flow channel (2.1), at the end of the outlet nozzle (2.2) is arranged, wherein the drainage channel (2.1) for forming an odor trap has a wave-shaped, an overflow edge (2.5) defining channel portion (2.11), and with a the inlet opening (3) surrounding seal (7), the one for conditioning to the underside of a trough bottom certain sealing surface (7.1), characterized in that in a functional position of the drain fitting (1, 1 ') above the overflow edge (2.5) located housing portion (2.12) of the flow channel (2.1), the sealing surface (7.1) upwards surmounted, wherein the shortest horizontal distance (A _K ) of the highest point of the overflow edge (2.5) of the circumferential inner surface of the inlet opening (3) at least the 0.9-f ache, preferably at least 1.1 times, more preferably at least 1.2 times the horizontal inner width (D) of the inlet opening (3). Discharge fitting according to claim 1, characterized in that the overflow edge (2.5) is at the same level or higher than a seal (7) carrying the flange (2.7) of the housing (2). Discharge fitting according to claim 1, characterized in that the overflow edge (2.5) is lower than a seal (7) carrying the flange (2.7) of the housing (2), wherein the vertical distance of the overflow edge (2.5) from the top of the seal ( 7) carrying flange (2.7) is not more than 8 mm, preferably not more than 5 mm. Discharge fitting according to one of claims 1 to 3, characterized in that the wavy channel section (2.11) viewed in longitudinal section has a concave bottom portion (2.13) whose radius of curvature is greater than the overall height (H ₁ ) of the housing (2). Drain fitting according to one of claims 1 to 4, characterized in that the wave-shaped channel portion (2.11) viewed in longitudinal section has a convex bottom portion (2.14) extending at least to the overflow edge (2.5) and its radius of curvature is greater than half the height (H ₁ ) of the housing (2). Discharge fitting according to one of claims 1 to 5, characterized in that the housing (2) consists of a lower housing part (2.8) and a housing upper part (2.9), wherein the lower housing part (2.8) and the upper housing part (2.9) by a peripheral connecting seam ( 2.10) are connected to each other in a liquid-tight manner, and wherein the connecting seam (2.10) extends on opposite longitudinal sides of the wavy-shaped channel section (2.11) of the drainage channel. Discharge fitting according to claim 6, characterized in that the discharge nozzle (2.2) designed to connect a circular cross-section having a drain pipe (4) and integrally formed with the lower housing part (2.8). Discharge fitting according to one of claims 1 to 7, characterized in that the width (B) of the drainage channel (2.1) seen in the direction of water drainage between the overflow edge (2.5) and the outlet nozzle (2.2) decreases. Discharge fitting according to one of claims 1 to 8, characterized in that the width (W ₂ ) of the orthogonal to the channel base area measured Flow channel (2.1) after the overflow edge (2.5) in the direction of the outlet nozzle (2.2) increases towards. Discharge fitting according to one of claims 1 to 9, characterized in that the inlet opening (3) of the housing (2) by a Gehäuseinnenwandung (2.4) is defined, which is formed substantially circular cylindrical or circular arc-shaped wall sections (2.41), wherein the circular arc-shaped wall sections (2.41) are connected to each other via radially inwardly projecting wall sections (2.42), in which at least portions of threaded sleeves (10) are accommodated. Discharge fitting according to claim 10, characterized in that the radially inwardly projecting wall sections (2.42) with respect to the outside of the housing (2) radially projecting wall sections (2.43) are aligned. Discharge fitting (1 ') according to one of claims 1 to 11, characterized in that the housing (2) facing one of the inlet opening (3), in the direction of the drainage channel (2.1) inclined toward bottom surface (24). Discharge fitting according to one of claims 1 to 12, characterized in that the odor trap is executed without dip tubes. Discharge fitting according to one of claims 1 to 13, characterized in that the distance (H ₂ ) between the underside of the housing (2) and intended for engagement with the underside of a trough bottom sealing surface (7.1) less than 75 mm, preferably less than 70 mm, more preferably less than 60 mm. Discharge fitting according to one of claims 1 to 14, characterized in that the above the overflow edge (2.5) located housing portion (2.12) of the flow channel (2.1) the sealing surface (7.1) surmounted by at least 10 mm. Discharge fitting according to one of claims 1 to 15, characterized in that the intended to bear against the underside of a trough bottom sealing surface (7.1) is provided with an adapter ring having a vertical thickness of at least 5 mm, preferably at least 10 mm.

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