AU2016274373A1

AU2016274373A1 - Drain assembly

Info

Publication number: AU2016274373A1
Application number: AU2016274373A
Authority: AU
Inventors: Roman Hausheer
Original assignee: Geberit International AG
Current assignee: Geberit International AG
Priority date: 2015-06-12
Filing date: 2016-05-13
Publication date: 2017-11-16
Anticipated expiration: 2036-05-13
Also published as: CN107646059A; DK3505703T3; PL3103937T3; EP3505703B1; PL3505703T3; AU2016274373B2; WO2016198234A1; EP3103937A1; DK3103937T3; EP3103937B1; EP3505703A1

Abstract

The invention relates to a drain assembly (29) for roof drainage, comprising a drain device (3) and an inlet device (1), wherein the drain device (3) has a pipe piece (18) and at least one retaining element (6), which is preferably connected to the pipe piece (18), and wherein the inlet device comprises a covering part (4) for covering the pipe entrance (2), the covering part having lateral passages (21), through which water can be fed to the pipe entrance (2), and a functional part (5), which is arranged below the covering part (4). The functional part (5) is selectively a damming functional part (7) that defines a damming height (S) or an emergency overflow functional part (8) having an inlet (26) that defines an inlet height (E), wherein the damming functional part (7), the emergency overflow functional part (8), and the covering part (4) can be fastened to said at least one retaining element (6).

Description

TITLE

Drain assembly

TECHNICAL FIELD

The present invention relates to a drain assembly for roof drainage, comprising a drain device and an inlet device, according to the preamble of claim 1.

PRIOR ART

Drainage systems for surfaces, such as, for instance, flat roofs, are known from the prior art. Such drainage systems here comprise a pipe system, via which the water lying on the surfaces is led off. Typically, a negative pressure prevails in the pipe system, which negative pressure ensures a rapid and secure drainage.

The Applicant itself markets such a drainage system under the name Pluvia.

SUMMARY OF THE INVENTION

Starting from this prior art, the object of the invention is to provide a drain assembly for roof drainage systems which overcomes the drawbacks of the prior art. In particular, a drain device which can be mounted as flexible a manner as possible is intended to be provided.

This object is achieved by the subject of claim 1. According to this, a drain assembly for roof drainage comprises a drain device and an inlet device. The drain device has a pipe socket and at least one retaining element, which latter is preferably in connection with the pipe socket. The retaining element could also be fastened differently, for instance to a building side. The inlet device comprises a cover part for covering the pipe entrance, said cover part having lateral passages through which water can be fed to the pipe entrance, and a functional pail, which is disposed beneath the cover part. The functional part is selectively a build-up functional part that defines a build-up height, or an emergency overflow functional part having an inlet that defines an infeed height. Both the build-up functional part and the emergency overflow functional part and the cover part are fastenable to the at least one retaining element.

The retaining element thus serves to receive the build-up functional part and the cover part or the emergency overflow functional part and the cover part. Thus the pairing build-up functional part and cover part and the pairing emergency overflow functional part and cover part can be fastened to the same retaining element. This configuration is advantageous, because an adaptation of the retaining elements with a view to the functioning of the drain assembly is no longer necessary.

Furthermore, the advantage is also obtained that the drain assembly can be used more flexibly. Thus the installer can decide on the spot whether the drain assembly can be used as an emergency overflow or as a normal inlet.

Preferably, both the build-up functional part and the emergency overflow functional part are held on the retaining element by the cover part. In this case, the cover part serves as fastening means for the build-up functional part and. the emergency overflow functional part to the retaining element. Additional fastening elements can thus be dispensed with.

Particularly preferredly, precisely two retaining elements, with respect to the pipe socket, are arranged diametrically opposite each other.

As mentioned, the functional part can be provided as a build-up functional part or as an emergency overflow functional part. The build-up functional part is here configured differently than the emergency overflow functional part. However, the cover part is identical in both cases. Consequently, the advantage is obtained that the inlet device can be provided in versatile form, i.e. with the two functions "normal drain" and "emergency drain", wherein merely the appropriate functional part has to be chosen.

Particularly preferredly, the cover part provides an interior in which the functional part lies. The interior is accessible through said through holes.

Preferably, the build-up functional part comprises at least one fastening interface for the fastening of the build-up functional part to the retaining element, and the emergency overflow functional part comprises at least one fastening interface for the fastening of the emergency overflow functional part to the retaining element. Said fastening interface of the build-up functional part and the fastening interface of the emergency overflow functional part are here configured substantially identically to each other.

By an identical configuration of the fastening interface it is understood that, in the arrangement of the retaining elements, no modifications is necessary should the fastening of the build-up functional part or of the emergency overflow functional part change. That is to say, in a given configuration of the retaining elements, both the build-up functional part and the emergency overflow functional part can be connected to the retaining elements.

Preferably, the build-up functional part and the emergency overflow functional part has a disk-shaped base portion, wherein, in the assembled state, the disk-shaped base portion of the build-up functional part and that of the emergency overflow functional part lie preferably at the same height.

The base portion can here comprise and/or receive and/or provide at least parts of the fastening interface.

Preferably, the fastening interface of the build-up functional part and the fastening interface of the emergency overflow part has the form of an opening. According to the number of retaining elements, a plurality of openings can be arranged. The number of retaining elements preferably corresponds to the number of openings. The opening or openings are disposed in the same location and/or in the same position on the build-up functional part and on the emergency overflow functional part.

Preferably, the opening is disposed in the disk-shaped base portion. The disk-shaped base portion can be configured differently in the region of the opening. In a first configuration, the disk-shaped base portion is of planar configuration in the region of the opening. In a second configuration, the disk-shaped base portion has in the region of the opening a bulge extending away from the cover part, wherein the opening is disposed in the bulge. As a result of the bulge, the shape of the base portion is changed, whereby the shape of the retaining element, which is mounted on the building side, can also be altered. If the bulge, for instance, projects in the direction of the building, then the retaining element can be configured shorter, which, in the assembly process, is advantageous with respect to any unintended deformation by the installer. The bulge in the build-up functional part is here preferably configured identically to the bulge in the emergency overflow functional part.

Preferably, at least one fastening element is displaceably mounted on the cover part, with which fastening element the cover part is fastenable to the retaining element. Preferably, the fastening element is rotatable about an axis. The number of fastening elements preferredly corresponds to the number of retaining elements. The fastening elements are preferably arranged in the same location and/or in the same position relative to the openings.

The fastening element can be of single-part or multipart configuration. In the multipart configuration, the fastening element comprises an actuator part and a locking part, which are in connection with each other, wherein the actuator part lies at least partially on the top side of the cover part and the locking part lies at least partially on the bottom side of the cover part.

Preferably, the retaining element is configured as a pin having a notch, in particular a circumferential groove, wherein the cover part, in particular with the fastening element, can be fastened to the retaining element via the notch.

Preferably, the retaining element has a bearing surface, on which the functional part, in particular with the bottom side of the base portion, is supported. The bearing surface is preferredly arranged at a distance from the notch, which distance preferably corresponds to the thickness of the base portion.

Preferably, the functional part and the cover part comprise alignment elements, in particular recesses and elevations, wherein, via the alignment elements, the cover part can be aligned to the functional part. Preferably, recess are arranged on the functional part, and the webs which limit the through holes on the cover part serve as elevations.

Preferably, in the case of the emergency overflow functional part, the base portion comprises a passage opening, which provides the inlet, and an elevation, which extends from the disk-shaped base portion fully around the passage opening and the top edge of which defines the infeed height. Through the choice of height of the elevation, the maximum height of the water level until the water is meant to flow off via the emergency overflow can be defined.

In the installation position, the base portion of the build-up functional part and the base portion of the emergency overflow functional part lie substantially at the same height.

Particularly preferredly, the elevation is part of a pipe section, which extends from the top edge of the elevation through the disk-shaped base portion and, in the installation position, projects into the pipe entrance of the drain pipe.

Preferably, between the bottom side of the cover part and the elevation a free interspace is present, through which the water to be led off can be fed to the inlet of the emergency overflow functional part.

Preferably, the build-up functional part is arranged at a distance from the pipe socket, so that water, by virtue of the spacing, can flow into the pipe socket. Between the build-up functional part, in particular its base portion, and the pipe entrance is thus created an interspace, via which the water can flow in. Until such time as the level of the build-up functional part is reached, the water flows normally with air into the pipe socket. As soon as the build-up height is exceeded, the build-up functional part prevents further inflow of air into the pipe socket, thereby promoting the flow-off of water.

Preferably, the emergency overflow functional part is arranged in such a way relative to the pipe socket that water can flow into the pipe socket solely via the inlet of the emergency overflow functional part. In particular, the pipe piece of the emergency overflow functional part projects into the pipe socket. Between pipe piece and pipe socket is preferably arranged a seal.

The build-up functional part serves to prevent air from passing into the drain pipe once the water level on the building has reached or exceeded a build-up height. The emergency overflow functional part has an infeed defining an inlet height, wherein, by the emergency overflow functional part, an emergency drainage is provided when the infeed height is exceeded by the water level on the building. The build-up height of the build-up functional part is lower than or equal to the infeed height of the emergency overflow functional part.

Further embodiments are defined in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention are described below on the basis of the drawings, which serve merely for illustrative purposes and should not be interpreted restrictively. In the drawings:

Fig. 1 shows a perspective view of a drain assembly comprising a drain device for roof drainage and an inlet device;

Fig. 2 shows a sectional view of the drain assembly according to figure 1 having a build-up functional part;

Fig. 3 shows a sectional view of the drain assembly according to figure 1 having an emergency overflow functional part;

Fig. 4 shows an exploded view of the drain assembly according to figure 1 and 2 having the build-up functional part;

Fig. 5 shows an exploded view of the drain assembly according to figure 1 and 2 having the emergency overflow functional part;

Fig. 6 shows an exploded view of the drain assembly having the build-up functional part, according to a further variant;

Fig. 7 shows an exploded view of the drain assembly having the emergency overflow functional part, according to the variant shown in figure 6;

Fig. 8 shows an exploded view of the drain assembly having the build-up functional part, according to a further variant; and Fig. 9 shows an exploded view of the drain assembly having the emergency overflow functional part, according to the variant shown in figure 8.

DESCRIPTION OF PREFERRED EMBODIMENTS

In figure 1, a perspective view of a drain assembly 29 is shown. The drain assembly 29 comprises a drain device 3, for drainage of water from a building, and an inlet device 1, which is arranged over the drain device 3. Via the inlet device 1, the water to be led off is fed to the drain device 3. In the drainage of water from a building, a drain assembly 29 of this type, which is shown in the figures, is typically disposed on a roof. Other surfaces, which may not be part of a building, can also, however, be drained of water. The building is shown only symbolically in the figures and bears the reference symbol G.

Figures 2 and 3 show a sectional representation of the drain device 29 according to the invention. In particular, the inlet device 1 is shown in greater detail. The inlet device 1 is now more closely described on the basis of figures 2 and 3.

The inlet device 1 comprises a cover part 4, for covering the pipe entrance 2, and a functional part 5. The functional part 5 is disposed beneath the cover part 4. The cover part 4 is provided with a multiplicity of lateral passages 21, through which water can be fed to the drain device 3. The cover part 4 and the functional part 5 are fastenable to a retaining element 6 of the drain device 3, which retaining element is mounted on the building side. The functional part 5 is, selectively, a build-up functional part 7 or an emergency overflow functional part 8. In other words: the functional part 5 can be selected from the group comprising build-up functional part 7 and emergency overflow functional part 8.

Typically, on a building which is to be drained of water are arranged at least one drain assembly or a plurality of drain assemblies 29 having the build-up functional part 7, and at least one drain assembly or a plurality of drain assemblies 29 having the emergency overflow functional part 8.

In figure 2, the functional part 5 is shown as a build-up functional part 7. The build-up functional part 7 lies at a distance from the pipe entrance 2 of the drain device 3, so that a free interspace 35 is present between the pipe entrance 2 and the build-up functional part 7. Through this free interspace 35, the water to be led off flows to the pipe entrance 2. The water flow is represented by the arrow W. The build-up functional part 7 serves to prevent air from passing into the drain pipe 3 once the water level on the building has reached or exceeded a build-up height S. The build-up height S is illustrated in figure 2 with a dashed line. As soon as the water on the building G has reached the build-up height S, the inflow, here the interspace 37, to the pipe entrance 2 is filled fully with water, and air can be prevented from passing into the pipe entrance 2. By virtue of the thereby generated flow ratios, the discharge capacity can be increased.

In figure 3, the functional part is shown as an emergency overflow functional part 8. The emergency overflow functional part 8 comprises an inlet 26, which defines an infeed height E. The emergency overflow functional part 8 provides an emergency drain when the infeed height E is exceeded by the water level on the building G. In figure 3, the infeed height E is represented with a dashed line. Between the bottom side of the cover part 4 and the elevation 13, a free interspace 37 is present, through which the water to be led off can be fed to the inlet 26.

As shown in figures 2 and 3, the build-up height S of the build-up functional part 7 is lower than or equal to the infeed height E of the emergency overflow functional part 8. That is to say that, until the infeed height E is reached, the water flows off via those drain assemblies which are equipped with the build-up functional part 7 and, when the infeed height E is exceeded, the water flows off via those drain assemblies which are equipped with the emergency overflow functional part 8.

The cover part 4 comprises in the shown embodiment a cap portion 39, away from which a multiplicity of webs 38 extend laterally. The webs 38 are arranged at a distance apart. By virtue of the spacing, the passages 21 are created.

The build-up functional part 7 and the emergency overflow functional part 8 respectively comprise at least one fastening interface 15, via which the respective functional part 7, 8 is fastenable to the retaining element 6 of the drain device 3. The fastening interface of the build-up functional part 7 is here configured substantially identically to the fastening interface of the emergency overflow functional part 8. Thus, both functional parts 7, 8 can be connected to the same retaining elements 6. The installer can decide on the spot whether a build-up functional part 7 or an emergency overflow functional part 8 should be arranged, without adaptations having to be made to the retaining elements 6 or the functional parts 7, 8.

From figures 2 and 3, it can further be seen that both the build-up functional part 7 and the emergency overflow functional part 8 have a disk-shaped base portion 9. In the assembled state, the disk-shaped base portion 9 of the build-up functional part 7 and that of the emergency overflow functional part 8 lies preferably at the same height.

In the shown embodiment, said fastening interface 15 is part of the base portion 9. The fastening interface 15 is here represented as openings which extend through the base portion 9. Via these openings, the build-up functional part 7 or the emergency overflow functional part 8 is mounted on the retaining element 6. The retaining element 6 here extends through the opening 15.

The build-up height S is defined by the top side 11 of the disk-shaped base portion 9. The water can thus rise up to the top side 11 of the disk-shaped base portion 9, and only then is air prevented from being sucked in.

In the case of the emergency overflow functional part 8, the base portion 9 has a passage opening 10 providing the inlet 26. The passage opening 10 is here fully surrounded by an elevation 12, which extends from the disk-shaped base portion 9. The elevation 12 substantially fully surrounds the passage opening 10. The top edge 13 of the elevation 12 here defines the infeed height E. The elevation 12 is here part of a pipe section 14, which extends from the top edge 13 of the elevation through the disk-shaped base portion 9 and in the installation position, as shown in figure 3, projects into the pipe entrance 2 of the drain device 3. Preferably, the connection between pipe section 14 and pipe entrance 2 is of watertight configuration. The water flows along the arrow W through the passages 21 of the cover part 4 and then flows via the elevation 12 into the pipe section 14, and thus into the drain device 3.

In the exploded views of figures 4 to 9, various arrangements of the opening 15, which in the shown embodiments provide said fastening interface, are shown.

In figures 4 to 5, the opening 15 is disposed in the base portion 9. The disk-shaped base portion 9 is here of planar, i.e. flat, configuration in the region of the opening 15.

In figures 6 to 9, two further variants are shown. Here, the disk-shaped base portion 9, in the region of the opening 15, is configured with a bulge 16. The bulge 16 here extends away from the cover part 4, i.e. in the direction of the drain device 3. The opening 15 lies at the base of the bulge 16 and is hence disposed in the bulge 16. The bulge 16 has the advantage that the bottom side of the disk-shaped base portion 9, which bottom side is facing the drain device 3, lies closer to the drain device 3. The retaining elements 6 can hence be configured correspondingly shorter, which, in terms of assembly, has the advantage that these can be pressed down by tools or installers. If the length of the retaining elements 6 is compared between figures 4 and 5 and figures 6 to 9, this function becomes evident.

In figures 6 to 7, the bulge 9 is arranged such that this is surrounded by the base portion 9. In figures 8 to 9, the bulge 9 is arranged such that it is configured open with respect to the rim of the base portion 9.

Furthermore, in the shown embodiments according to figures 1 to 9, a fastening element 17 is displaceably mounted on the cover part 4. The fastening element 17 is here rotatably mounted on the cover part 4 and can be brought from an unlocking position into a locking position. The fastening element 17 cooperates with the retaining element 6 and secures the cover part 4, as well as the functional part 7, 8, to the retaining element 6. In the locking position, the cover part 4 and the functional parts 7, 8 thus cannot be separated from the retaining element 6. In the unlocking position, the two parts can be removed from the retaining element 6. The fastening element 17 engages with a latching recess 36 in a groove 20 on the retaining element 6, which latter here the form of a pin 19. The groove 20 can also be a notch, which is not fully circumferential. The cover part 4 is hereby secured to the retaining element 6. The retaining element 6 further comprises a bearing surface 24. Furthermore, the retaining element 6 projects through the opening 15 on the functional element 7, 8, and. the latter rests with its bottom side 25 on the bearing surface 24. Through the contact with the fastening element 17, the functional element 7, 8 is clamped between bearing surface 24 and fastening element 17 and is in this way secured to the retaining element 6.

In the present case, two fastening elements 17 are arranged. It would also be conceivable to provide just one, or more than two fastening elements 17. The number of retaining elements 9 preferably corresponds to the number of fastening elements.

In the shown embodiment, the fastening elements 17 are of two-part configuration. The fastening elements 17 here comprise an actuator part 22 and a locking part 23. The actuator part 22 is here in connection with the locking part 23. The actuator part 22 here extends on the top side of the cover part 4, and through the cover part 4, and is rotatably mounted in the cover part 4. The actuator part 22 can be comfortably grasped by an installer. The locking part 23 lies on the bottom side of the cover part 4 and cooperates with the retaining element 6. Actuator part 22 and locking part 23 are preferably connected to each other via a latching connection. The fastening element 17 can also, however, be of single-part configuration.

Above the cover part 4, the fastening element 17 here has a grip plate 30. The grip plate 30 can be grasped by the installer for the actuation of the fastening element. In addition, from the top side of the cover part 4 extends a ridge 31. The ridge 31 here lies between two fastening elements 17. The ridge 31 and the grip plates 30 can be used by the installer to indicate the position of the fastening elements. If the grip plates 30 lie in alignment with the ridge, then the fastening elements 17 are in the locked position. If the grip plate 30 lies at an angle to the ridge 31, then the fastening element 17 lies in the unlocked position.

On the bottom side, the fastening element 17 here also has a boss 32. The boss 32 here projects into a recess 33 in the base portion 9. Through the pairing boss 32 and recess 33, a guidance between the fastening element 17 and the build-up functional part 7 or the emergency overflow functional part 8 can be provided. The guidance helps in the actuation of the fastening element, but also in the positioning of the cover part 4.

Furthermore, it is advantageous if the functional part 7, 8 and the cover part 4 comprise alignment elements 27, 28, wherein, via the alignment elements 27, 28, the cover part 4 can be aligned to the functional part 7, 8. In the shown embodiments, an alignment element 27, 28 consisting of a pairing elevation and recess is provided. The elevation 27 is provided by the webs 38, which limit the passages 21, and the recess 28 extends from the rim into the base portion 9.

As shown in figures 2 to 9, the drain device 3 comprises a pipe socket 18 and at least one retaining element 6 being in connection with the pipe socket 18. In the shown embodiment, respectively two retaining elements 6 are shown. The cover part 4 and the build-up functional part 7 or the emergency overflow functional part 8 are here fastened with the fastening element 17 to the retaining element 6. The build-up functional part 7 is arranged at a distance from the pipe socket 18, so that water, by virtue of this spacing, can flow into the pipe socket 18. The emergency overflow functional part 8 is arranged in such a way relative to the pipe socket 18 that water can flow into pipe socket 18 solely via the inlet 26 of the emergency overflow functional part 8.

Preferably, the build-up functional part 7 has a flow-optimized shape. To this end, on the bottom side, which is facing toward the drain device 3, the build-up functional part 7 is configured appropriately. The flow-optimized elements bear the reference symbol 34.

REFERENCE SYMBOL LIST 1 inlet device 27 alignment element 2 pipe entrance 28 alignment element 3 drain device 29 drain assembly 4 cover part 30 grip plate 5 functional part 31 ridge 6 retaining element 32 boss 7 build-up functional part 33 recess 8 emergency overflow 34 flow-optimizing elements functional part 35 interspace 9 base portion 36 latching recess 10 flow-through opening 37 interspace 11 top side 38 webs 12 elevation 39 cap portion 13 top edge 14 pipe section S build-up height 15 fastening interface, opening E infeed height 16 bulge G building 17 fastening element W water inlet 18 pipe socket 19 pin 20 groove 21 passages 22 actuator part 23 locking part 24 bearing surface 25 bottom side 26 inlet

Claims

PATENT CLAIMS

1. A drain assembly (29) for roof drainage, comprising a drain device (3) and an inlet device (1), wherein the drain device (3) has a pipe socket (18) and at least one retaining element (6), which latter is preferably in connection with the pipe socket (18), and wherein the inlet device comprises a cover part (4) for covering the pipe entrance (2), said cover part having lateral passages (21) through which water can be fed to the pipe entrance (2), and a functional part (5), which is arranged beneath the cover part (4), wherein the functional part (5) is selectively a build-up functional part (7) that defines a build-up height (S), or an emergency overflow functional part (8) having an inlet (26) that defines an infeed height (E), characterized in that both the build-up functional part (7) and the emergency overflow functional part (8) and the cover part (4) are fastenable to said at least one retaining element (6).
2. The drain assembly (29) as claimed in claim 1, characterized in that both the buildup functional part (7) and the emergency overflow functional part (8) are held on the retaining element (6) by the cover part.
3. The drain assembly (29) as claimed in claim 1 or 2, characterized in that the buildup functional part (7) and the emergency overflow functional part (8) respectively comprise at least one fastening interface (15), via which the respective functional part (5, 7, 8) are fastenable to the retaining element (6), wherein the fastening interface of the build-up functional part (7) and the fastening interface of the emergency overflow functional part (8) are configured substantially identically to each other.
4. The drain assembly (29) as claimed in one of the preceding claims, characterized in that the build-up functional part (7) and the emergency overflow functional part (8) respectively have a disk-shaped base portion (9), wherein, in the assembled state, the diskshaped base portion (9) of the build-up functional part (7) and that of the emergency overflow functional part (8) lie preferably at the same height.
5. The drain assembly (29) as claimed in claim 4, characterized in that the base portion (9) can comprise and/or receive and/or provide at least parts of the fastening interface (15).
6. The drain assembly (29) as claimed in one of the preceding claims 3 to 5, characterized in that the fastening interface of the build-up functional part and the fastening interface of the emergency overflow part has the form of an opening (15), which is arranged in the same location or in the same position on the build-up functional part (7) and on the emergency overflow functional part (8).
7. The drain assembly (29) as claimed in claim 6, characterized in that the opening (15) is arranged in the disk-shaped base portion (9), wherein the disk-shaped base portion (9) is of planar configuration in the region of the opening (15), or wherein the disk-shaped base portion (9) has in the region of the opening (15) a bulge (16) extending away from the cover part (4), wherein the opening (15) is arranged in the bulge (16).
8. The drain assembly (29) as claimed in one of the preceding claims, characterized in that at least one fastening element (17) is displaceably mounted on the cover part (4), with which fastening element (17) the cover part (4) is fastenable to the retaining element (6).
9. The drain assembly (29) as claimed in claim 8, characterized in that the fastening element (17) is of single-part configuration, or of multipart configuration comprising an actuator part (22) and a locking part (23), which are in connection with each other, wherein the actuator part (22) lies at least partially on the top side of the cover part (4) and the locking part (23) lies at least partially on the bottom side of the cover part (4).
10. The drain assembly (29) as claimed in one of the preceding claims, characterized in that the retaining element (9) is configured as a pin (19) having a notch, in particular a circumferential groove (20), wherein the cover part (4), in particular with the fastening element (17), can be fastened to the retaining element via the notch.
11. The drain assembly (29) as claimed in one of the preceding claims, in particular as claimed in claim 10, characterized in that the retaining element (9) has a bearing surface (24), on which the functional part (5), in particular with the bottom side (25) of the base portion (9), is supported, wherein the bearing surface (24) is arranged at a distance from the notch (20), which distance preferably corresponds to the thickness of the base portion (9).
12. The drain assembly (29) as claimed in one of the preceding claims, characterized in that the functional part (5, 7, 8) and the cover part (4) possess alignment elements (27, 28), in particular recesses (27) and elevations (28), wherein, via the alignment elements (27, 28), the cover part (4) can be aligned to the functional part (5, 7, 8).
13. The drain assembly (29) as claimed in one of the preceding claims, characterized in that, in the case of the build-up functional part (7), the top side (11) of the diskshaped base portion (9) defines the build-up height (S), and/or in that the emergency overflow functional part (8) the base portion (9) comprises a passage opening (10), which provides the inlet (26), and an elevation (12), which extends from the disk-shaped base portion (9) fully around the passage opening (10) and the top edge (13) of which defines the infeed height.
14. The drain assembly (29) as claimed in claim 13, characterized in that the elevation (12) is part of a pipe section (14), which extends from the top edge (13) of the elevation (12) through the disk-shaped base portion (9) and, in the installation position, projects into the pipe entrance (2) of the drain device (3).
15. The drain assembly (29) as claimed in one of the preceding claims 13 and 14, characterized in that between the bottom side of the cover part (4) and the elevation (26) a free interspace (37) is present, through which the water to be led off can be fed to the inlet (26), and/or in that the build-up functional part (7) is arranged at a distance from the pipe socket (18), so that between the pipe entrance (2) and. the build-up plate is created a free interspace (35), through which water can flow to the pipe socket (18), and/or in that the emergency overflow functional part (8) is arranged in such a way relative to the pipe socket (18) that water can flow into the pipe socket solely via the inlet (26) of the emergency overflow functional part (8).