A dark slope drainage assembly type slab building floor system

Abstract

The utility model discloses a kind of concealed slope drainage assembly type slab floor systems, which is composed of drainage keel structure and U-shaped pipe;The drainage keel structure is an assembly type grid frame structure, which is laid on a waterproof surface of a bathroom and composed of a plurality of supporting water guide channels, frame edge water guide channels, cross connecting grooves, "L"-shaped connecting grooves and "T"-shaped connecting grooves;The supporting water guide channels are used to support a floor and to supply and drain water;The frame edge water guide channels are used to form the frame of the drainage keel structure and are installed against a wall root;The cross connecting grooves, "L"-shaped connecting grooves and "T"-shaped connecting grooves are all connecting pieces;The cross connecting grooves are used to connect the supporting water guide channels and the floor;The "L"-shaped connecting grooves are used to connect two adjacent frame edge water guide channels at a corner of a wall;The "T"-shaped connecting grooves are used to connect the supporting water guide channels and the frame edge water guide channels;The utility model has the advantages that, by means of base layer finding slope, overhead water guide channel and other building structures, zero height difference of large-size floor tiles, slope-free, anti-slip drainage are achieved.

Description

Technical Field

[0001] This utility model relates to a modular floor system, specifically a prefabricated modular floor system with concealed slope drainage, which is particularly suitable for bathroom floors and belongs to the field of construction. Background Technology

[0002] In recent years, with the rapid development of building materials technology and the demand for high-quality living, bathroom walls and floors have evolved from traditional small (such as 300mm*600mm) terracotta bricks to larger (such as 800mm*800mm or 1200mm*1200mm) ceramic tiles, and even more simple and spacious materials such as stone and rock slabs. However, new problems such as difficulty in finding the slope and slip resistance have emerged. In addition, the traditional wet-laying process for flooring results in some sewage stagnating in the slope layer and cement mortar bonding base layer of the tile adhesive, which will produce odors after volatilization. Existing bathrooms have three major defects: (1) height difference obstacle: a 10-20mm water barrier is set at the door, which hinders the smooth passage of wheelchairs in accessible bathrooms (for the disabled); (2) risk of slippage: the slope of the ground (1%-2%) causes the wheelchair to slip when parked; (3) wet and slippery hazard: the sloping floor tiles are easy to slip when wet, and the drainage efficiency is low due to the slope. Traditional solutions attempting to eliminate the water-retaining platform rely on precise slope construction, but struggle to simultaneously address vehicle slippage and drainage issues, necessitating structural innovation. Furthermore, the presence of stagnant water in the tiled floor base layer year-round increases the structure's weight and generates excessive odors. Summary of the Invention

[0003] The purpose of this utility model is to design a prefabricated panel floor system with hidden slope drainage. It adopts a structural design with 0-slope surface, full plane and elevated drainage, which completely eliminates the obstacles of height difference on the bathroom floor, the risk of vehicles slipping and slipping, and reduces the problems of water retention and odor. At the same time, it reduces construction costs and improves sound insulation performance.

[0004] The technical solution of this utility model is as follows: A prefabricated slab floor system with concealed slope drainage, comprising a drainage joist structure and U-shaped pipes; the drainage joist structure is a prefabricated grid frame structure, laid on the waterproof surface of the bathroom, and consists of several supporting water guide channels, frame edge water guide channels, cross connecting channels, "L" shaped connecting channels, and "T" shaped connecting channels; the supporting water guide channels support the floor and facilitate water inlet and outlet; the frame edge water guide channels form the frame of the drainage joist structure and are installed against the wall; the cross connecting channels, "L" shaped connecting channels, and "T" shaped connecting channels are all connectors; the cross connecting channels connect the supporting water guide channels and the supporting floor; the "L" shaped connecting channels connect two adjacent frame edge water guide channels at a corner; and the "T" shaped connecting channels connect the supporting water guide channels and the frame edge water guide channels.

[0005] Further, the supporting water guide groove is a strip-shaped "convex" structured groove, comprising a groove body; the groove body is of a cuboid structure and is configured for water guiding, supporting and draining; a raised water inlet is arranged at the middle position of the top of the groove body; the water inlet is configured for water inflow; the left and right sides of the top of the groove body are respectively configured for supporting a floor; a plurality of drainage holes are arranged at the bottom of the groove body and are configured for draining water downwards.

[0006] Furthermore, anti-slip rubber layers are arranged on the left and right sides of the top of the groove body of the supporting water guide groove, which are configured to increase the friction force and sealing performance at the connection, and reduce noise on the contact surface at the same time.

[0007] Further, the frame-edge water guide groove is a strip-shaped "L"-shaped structured groove, the frame-edge water guide groove comprises a water guide groove body, the water guide groove body is a cuboid groove and is configured for supporting a floor, water inflow and draining; the rear end of the top of the water guide groove body is a raised water converging port; the water converging port is connected with the top of the water guide groove body in an "L" shape, and the water converging port is configured for water inflow; a rubber layer is arranged at the front end of the top of the frame-edge water guide groove, the surface of the rubber layer is a rough surface, which functions to increase friction force, enhance sealing performance and reduce noise of the bearing surface; a rubber adhesive strip is arranged on the surface of the rear groove body of the frame-edge water guide groove, and the rubber adhesive strip is adhered to the surface of a wall; a plurality of water guide groove drainage holes are arranged at the bottom of the frame-edge water guide groove and are configured for draining water downwards.

[0008] Further, the widths and heights of the cross connection groove, the "T"-shaped connection groove and the "L"-shaped connection groove are slightly smaller than the widths and heights of the supporting water guide groove and the frame-edge water guide groove.

[0009] Further, the cross connection groove is a cross-shaped groove, the cross connection groove comprises a cross connection groove body, the cross connection groove body is of a cube structure, connection notches are respectively arranged in four directions of front, back, left and right of the cross connection groove body, and the four connection notches are respectively configured for connecting the supporting water guide grooves in the four directions of front, back, left and right; a raised cross-shaped water inlet is arranged at the top of the cross connection groove body and is configured for water inflow; the length of the cross-shaped water inlet is consistent with the length of the cross connection groove body.

[0010] Further, the "L"-shaped connection groove is an L-shaped groove, the groove body of the "L"-shaped connection groove is an "L"-shaped structured groove body, and the upper rear end of the "L"-shaped structured groove body is provided with an L-shaped water inlet configured for water inflow; the groove notches on the left side and the front part of the "L"-shaped structured groove body are respectively configured for connecting the frame-edge water guide grooves on the left side and the front part; Furthermore, the "T"-shaped connecting groove is a T-shaped groove, including a T-shaped groove body, which is composed of a horizontal groove body and a vertical groove body. The vertical groove body is vertically installed at the middle of the front part of the horizontal groove body, thereby forming a "T"-shaped structure groove body. The left, right and front parts of the T-shaped groove body are respectively provided with "T"-shaped connecting groove connection ports. The "T"-shaped connecting groove connection ports on the left and right sides are respectively connected to the supporting water guide groove. The "T"-shaped connecting groove connection port at the front is connected to the frame edge water guide groove. The top of the T-shaped groove body is provided with a protruding T-shaped water inlet for water intake.

[0011] Furthermore, the bottom of the supporting water guide channel, the frame edge water guide channel, the cross connecting channel, and the "T" shaped connecting channel are all provided with several screw holes, which are used to install adjusting nuts. The adjusting nut consists of an adjusting screw, a supporting base, and a rubber anti-slip pad. The adjusting screw is used to connect to the screw holes, and the supporting base is installed at the bottom of the adjusting screw. The supporting base is a rectangular pad. The rubber anti-slip pad is also installed at the bottom of the supporting base. The rubber anti-slip pad is a rectangular rubber sheet, and the bottom surface of the rubber anti-slip pad has anti-slip texture. The adjusting nut is used to level the top surface of the drainage keel structure according to the inclination of the integrated protective slope construction layer on the bathroom waterproof layer.

[0012] Furthermore, the U-shaped pipe is located below the floor drain and is used for drainage and preventing backflow of odors; the U-shaped pipe has a U-shaped structure, and the left opening of the U-shaped pipe is a drain outlet connected to the floor drain; a horizontal drain pipe is connected to the right opening of the U-shaped pipe, and the drain pipe is used to connect to the main drainage pipe.

[0013] The drainage keel structure and adjusting nuts are made of rust-free materials such as stainless steel or resin fiber, so that corrosion will not affect the durability of the ground.

[0014] The beneficial effects of this utility model are as follows: 1. The hidden slope of the protective layer of the bathroom waterproofing layer collects the ground water discharged from the drainage keel structure; 2. Zero risk for large bricks: Physical embedding eliminates hollow areas, and full-surface paving maintains the integrity of large bricks; 3. Invisible moisture-proof: A 15mm indoor / outdoor concealed sill is installed below the bathroom door panel to replace the traditional water barrier (no visual obstruction); the concealed drain hole actively drains residual water from the underlayment; completely eliminating dampness in the door frame; 4. The overall cost has been optimized, the workload of surface slope finding has been reduced, and the waste of floor tiles has been reduced; 5. The surface layer adopts prefabricated construction, which reduces the impact of winter construction and eliminates the risk of hollow tiles during winter construction. At the same time, it reduces the risk of leakage and rework during the secondary water storage test in the bathroom. During maintenance, glass suction cups can be used to open or replace the panel. 6. For bathrooms with underfloor heating, the thickness of the wet-lay construction layer is reduced, improving the heat dissipation effect of the floor and providing certain energy-saving and environmental protection benefits.

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the planar structure of the drainage keel structure according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the water-supporting channel structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the vertical cross-sectional structure of the water guide channel in an embodiment of this utility model; Figure 4 This is a schematic diagram of the frame-side water guide channel structure in an embodiment of this utility model; Figure 5 This is a schematic diagram of the cross-shaped connecting groove structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the "T"-shaped connecting groove structure according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the "L"-shaped connecting groove structure according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the U-shaped tube structure according to an embodiment of the present utility model; In the diagram: 1. Supporting water channel, 11. Inlet, 12. Channel body, 13. Drain hole, 14. Anti-slip rubber layer, 2. Frame edge water channel, 21. Water channel body, 22. Water inlet, 23. Rubber layer, 24. Rubber adhesive strip, 25. Water channel drain hole, 3. Cross connecting groove, 31. Cross connecting groove body, 32. Cross-shaped inlet, 33. Connecting groove opening, 4. "L" shaped connecting groove, 41. "L" structure groove body, 42. L-shaped inlet, 5. "T" shaped connecting groove, 51. T-shaped groove body, 52. "T" shaped connecting groove connection opening, 53. T-shaped inlet, 6. U-shaped pipe, 61. Drain outlet, 62. Drain pipe, 7. Floor drain, 8. Floor, 81. Expanding foam, 9. Wall, 91. Ground, 10. Adjusting nut, 101. Adjusting screw, 102. Supporting base, 103. Rubber anti-slip mat. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example

[0018] like Figure 1-8As shown, the present invention discloses a concealed slope drainage fabricated slab floor system, which consists of a drainage keel structure and a U-shaped pipe 6; the drainage keel structure is a fabricated grid frame structure laid on the waterproof surface of a bathroom, and consists of a plurality of bearing water guide grooves 1, frame edge water guide grooves 2, cross connecting grooves 3, "L"-shaped connecting grooves 4 and "T"-shaped connecting grooves 5; The bearing water guide groove 1 is used for bearing a floor 8, water inlet and drainage; the bearing water guide groove 1 is a long-strip "convex"-shaped structural groove and comprises a groove body 12; the groove body 12 is of a cuboid structure and is used for water guiding, bearing and drainage; a raised water inlet 11 is arranged at the middle position of the top of the groove body 12; the water inlet 11 is used for water inlet; the left and right sides of the top of the groove body 12 are respectively used for bearing the floor 8; a plurality of drainage holes 13 are arranged at the bottom of the groove body 12 and used for draining water downwards; Further, anti-slip rubber layers 14 are arranged on the left and right sides of the top of the groove body 12 of the bearing water guide groove 1, which are used for increasing friction and sealing performance of a connecting position and reducing noise of a contact surface; The frame edge water guide groove 2 is used for forming a frame of the drainage keel structure and is installed against the root of a wall, the frame edge water guide groove 2 is a long-strip "L"-shaped structural groove and comprises a water guide groove body 21, the water guide groove body 21 is a cuboid groove and is used for bearing a floor, water inlet and drainage; a raised water collection opening 22 is arranged at the rear end of the top of the water guide groove body 21; the water collection opening 22 is in "L"-shaped connection with the top of the water guide groove body 21, and the water collection opening 22 is used for water inlet; a rubber layer 23 is arranged at the front end of the top of the frame edge water guide groove 2, the surface of the rubber layer 23 is a rough surface, which functions to increase friction, enhance sealing performance and reduce noise of a bearing surface; a rubber adhesive strip 24 is arranged on the surface of the rear groove body of the frame edge water guide groove 2, and the rubber adhesive strip 24 is adhered to the surface of a wall body 9; a plurality of water guide groove drainage holes 25 are arranged at the bottom of the frame edge water guide groove 2 and used for draining water downwards; The cross connecting groove 3, the "L"-shaped connecting groove 4 and the "T"-shaped connecting groove 5 are all connecting pieces; the width and height of the cross connecting groove 3, the "T"-shaped connecting groove 5 and the "L"-shaped connecting groove 4 are slightly smaller than the width and height of the bearing water guide groove 1 and the frame edge water guide groove 2; The cross connecting groove 3 is used for connecting the bearing water guide grooves 1 and bearing the floor 8; the cross connecting groove 3 is a cross-shaped groove and comprises a cross connecting groove body 31, the cross connecting groove body 31 is of a cube structure, connecting notches 33 are respectively arranged in four directions of front, back, left and right of the cross connecting groove body 31, and the four connecting notches 33 are respectively used for connecting the bearing water guide grooves 1 in the four directions of front, back, left and right; a raised cross-shaped water inlet 32 is arranged at the top of the cross connecting groove body 31 and used for water inlet; the length of the cross-shaped water inlet 32 is consistent with that of the cross connecting groove body 31; The "L"-shaped connecting groove 4 is used to connect two adjacent frame-side water guide grooves 2 at the corner of the wall; the "L"-shaped connecting groove 2 is an L-shaped groove, and the groove body of the "L"-shaped connecting groove 4 is an "L"-shaped structure groove body 41. The upper rear end of the "L"-shaped structure groove body 41 is an L-shaped water inlet 42 for water intake; the left side and front openings of the "L"-shaped structure groove body 41 are used to connect the left side and front frame-side water guide grooves 2, respectively. The "T"-shaped connecting groove 5 is used to connect the supporting water guide groove 1 and the frame-side water guide groove 2. The "T"-shaped connecting groove 5 is a T-shaped groove, including a T-shaped groove body 51. The T-shaped groove body 51 is composed of a horizontal groove body and a vertical groove body. The vertical groove body is vertically installed at the middle of the front part of the horizontal groove body, thereby forming a "T"-shaped structure groove body. The left, right and front parts of the T-shaped groove body 51 are respectively provided with "T"-shaped connecting groove connection ports 52. The "T"-shaped connecting groove connection ports 52 on the left and right sides are respectively connected to the supporting water guide groove 1. The "T"-shaped connecting groove connection port 52 at the front is connected to the frame-side water guide groove 2. The top of the T-shaped groove body 51 is provided with a protruding T-shaped water inlet 53 for water intake. Furthermore, the bottom of the supporting water guide channel 1, the frame-side water guide channel 2, the cross-shaped connecting channel 3, and the "T"-shaped connecting channel 5 are all provided with several screw holes, which are used to install adjusting nuts 10. The adjusting nut 10 consists of an adjusting screw 101, a supporting base 102, and a rubber anti-slip pad 103. The adjusting screw 101 is used to connect to the screw holes, and the supporting base 102 is installed at the bottom of the adjusting screw 10. The supporting base 102 is a rectangular pad. The rubber anti-slip pad 103 is also installed at the bottom of the supporting base 102. The rubber anti-slip pad 103 is also a rectangular rubber sheet, and the bottom surface of the rubber anti-slip pad 103 is provided with anti-slip texture. The adjusting nut 10 is used to level the top surface of the drainage keel structure according to the inclination of the integrated protective slope construction layer on the bathroom waterproof layer. The U-shaped pipe 6 is located below the floor drain 7 and is used for drainage and preventing backflow of odors. The U-shaped pipe has a U-shaped structure. The left opening of the U-shaped pipe is a drain outlet 61, which is connected to the floor drain. A horizontal drain pipe 62 is connected to the right opening of the U-shaped pipe. The drain pipe 62 is used to connect to the main drainage pipe. The drainage keel structure and adjusting nut 10 are made of rust-free materials such as stainless steel or resin fiber, so that corrosion will not affect the durability of the ground.

[0019] The usage method is as follows: Install a U-shaped pipe at the bottom of the bathroom floor drain, with the left end of the U-shaped pipe connected to the floor drain; connect the right end of the U-shaped pipe to the main drainage pipe; then lay a waterproof layer on the bathroom floor; after the waterproof layer is laid, install "L"-shaped connecting grooves at the four corners of the bathroom walls, with the back of the "L"-shaped connecting grooves flush against the corners; after the "L"-shaped connecting grooves are installed, install frame-edge water guide grooves along the wall edges on the left and right sides of the "L"-shaped connecting grooves, with one side of the frame-edge water guide groove connected to one side of the "L"-shaped connecting groove; the other side of the frame-edge water guide groove is connected to one side of the "L"-shaped connecting groove of a "T"-shaped connecting groove; the other side of the "L"-shaped connecting groove of the "T"-shaped connecting groove is connected to another frame-edge water guide groove of the same structure. Lay the four corners simultaneously in this order to form the framework of the drainage keel structure; connect one end of the water guide groove to the "T"-shaped connecting groove. The front convex structure is connected to the connecting groove; the other end of the supporting water guide groove is connected to one side of the cross connecting groove; the other side of the cross connecting groove is connected to the groove of another supporting water guide groove; the remaining supporting water guide grooves are laid in this manner to form the skeleton of the drainage keel structure; because after the waterproof layer is laid, the waterproof protective layer is constructed together with the slope layer to form a certain drainage slope, that is, a hidden slope, so it is necessary to adjust the height of the adjusting nuts at the bottom of the supporting water guide groove, the frame edge water guide groove, the cross connecting groove, the "T" shaped connecting groove and the "L" shaped connecting groove so that the drainage keel structure is on the same horizontal plane. After leveling, the floor is laid on the drainage keel structure. In order to improve the load-bearing capacity of larger slabs, several dots of expanding foam 81 can be applied to the middle of the bottom of the slab surface (or an adjustable point support bracket with silicone at both ends can be added) to fix the floor panel and increase the load on the floor.

Claims

1. A prefabricated panel floor system with concealed slope drainage, characterized in that: The system consists of a drainage keel structure and a U-shaped pipe; the drainage keel structure is a prefabricated grid frame structure laid on the waterproof surface of a bathroom, and is composed of a plurality of bearing water guide tanks, frame edge water guide tanks, cross connecting grooves, "L"-shaped connecting grooves and "T"-shaped connecting grooves; the bearing water guide tanks are used for bearing floors, as well as water inlet and drainage; the frame edge water guide tanks are used to form the frame of the drainage keel structure and are installed against the root of the wall; the cross connecting grooves, "L"-shaped connecting grooves and "T"-shaped connecting grooves are all connecting pieces; The cross connecting groove is used for connecting the bearing water guide tanks and bearing the floor; the "L"-shaped connecting groove is used for connecting two adjacent frame edge water guide tanks at the corner; the "T"-shaped connecting groove is used for connecting the bearing water guide tank and the frame edge water guide tank.

2. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The width and height of the cross connecting groove, the "T"-shaped connecting groove and the "L"-shaped connecting groove are slightly smaller than the width and height of the bearing water guide tank and the frame edge water guide tank.

3. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The bearing water guide tank is an elongated "convex"-shaped structural tank, comprising a tank body; the tank body is of a cuboid structure and is used for water guidance, bearing and drainage; a raised water inlet is provided at the middle position of the top of the tank body; the water inlet is used for water inflow; the left and right sides of the top of the tank body are respectively used for bearing the floor; a plurality of drainage holes are provided at the bottom of the tank body for draining water downward.

4. The prefabricated panel floor system with concealed slope drainage according to claim 3, characterized in that: Anti-slip rubber layers are provided on the left and right sides of the top of the tank body of the bearing water guide tank, which are used to increase the friction and sealing performance of the connection and reduce the noise of the contact surface at the same time.

5. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The frame edge water guide tank is an elongated "L"-shaped structural tank, the frame edge water guide tank comprises a water guide tank body, the water guide tank body is a cuboid tank, which is used for bearing the floor, water inlet and drainage; a raised water converging port is arranged at the rear end of the top of the water guide tank body; the water converging port is connected with the top of the water guide tank body in an "L" shape, and the water converging port is used for water inflow; a rubber layer is arranged at the front end of the top of the frame edge water guide tank, and the surface of the rubber layer is a rough surface; a rubber adhesive strip is arranged on the surface of the rear tank body of the frame edge water guide tank, and the rubber adhesive strip is pasted on the surface of the wall; a plurality of water guide tank drainage holes are arranged at the bottom of the frame edge water guide tank for draining water downward.

6. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The cross connecting groove is a cross-shaped groove, the cross connecting groove comprises a cross connecting groove body, the cross connecting groove body is of a cubic structure, connecting notches are respectively provided in four directions of front, back, left and right of the cross connecting groove body, and the four connecting notches are respectively used for connecting the bearing water guide tanks in the four directions of front, back, left and right; a raised cross-shaped water inlet is provided at the top of the cross connecting groove body for water inflow; the length of the cross-shaped water inlet is consistent with the length of the cross connecting groove body.

7. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The "L"-shaped connecting groove is an L-shaped groove, the groove body of the "L"-shaped connecting groove is an "L"-shaped structural groove body, an L-shaped water inlet is arranged at the upper rear end of the "L"-shaped structural groove body for water inflow; the notches on the left side and the front part of the "L"-shaped structural groove body are respectively used for connecting the frame edge water guide tanks on the left side and at the front part.

8. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The "T"-shaped connecting groove is a T-shaped groove, including a T-shaped groove body. The T-shaped groove body is composed of a horizontal groove body and a vertical groove body. The vertical groove body is vertically installed at the middle of the front part of the horizontal groove body to form a "T"-shaped structure groove body. The left, right and front parts of the T-shaped groove body are respectively provided with "T"-shaped connecting groove connection ports. The "T"-shaped connecting groove connection ports on the left and right sides are respectively connected to the supporting water guide groove. The "T"-shaped connecting groove connection port at the front is connected to the frame edge water guide groove. The top of the T-shaped groove body is provided with a protruding T-shaped water inlet for water intake.

9. The prefabricated panel floor system with concealed slope drainage according to claim 1, characterized in that: The bottom of the supporting water guide channel, the frame edge water guide channel, the cross connecting channel, and the "T" shaped connecting channel are all provided with several screw holes, which are used to install adjusting nuts. The adjusting nut consists of an adjusting screw, a supporting base, and a rubber anti-slip pad. The adjusting screw is used to connect to the screw holes, and the supporting base is installed at the bottom of the adjusting screw. The supporting base is a rectangular pad. The rubber anti-slip pad is installed at the bottom of the supporting base. The rubber anti-slip pad is a rectangular rubber sheet, and the bottom surface of the rubber anti-slip pad is provided with anti-slip texture.

10. The prefabricated slab floor system with concealed slope drainage according to claim 1, characterized in that: The U-shaped pipe is located below the floor drain and is used for drainage and preventing backflow of odors. The U-shaped pipe has a U-shaped structure, with the left end of the U-shaped pipe serving as the drain outlet, which is connected to the floor drain. A horizontal drain pipe is connected to the right end of the U-shaped pipe, which is used to connect to the main drainage pipe.

Images