Overall seepage water isolation, drainage and drainage waterproof device for toilets of buildings
By using an integrated isolation drainage system with PVC sealing panels and stainless steel filter plates in the bathroom, the problem of water leakage in the bathroom of the building was solved, achieving a long-term waterproof effect and avoiding repeated waterproofing and economic losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 丁善雪
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-21
AI Technical Summary
Existing buildings are prone to water leakage in bathrooms, especially at pipe joints and corners where waterproofing is difficult to achieve, leading to repeated waterproofing and economic losses.
PVC floor sealing panels and PVC side sealing panels are electrofused at the corners of the walls, combined with stainless steel filter plates and water overflow hoods to form an integrated isolation and drainage system. The water-conducting properties of the geotextile layer are utilized to ensure that seepage water is discharged smoothly.
It effectively prevents water from seeping into the floor from the sides and corners of the walls, keeps the floor slab dry for a long time, eliminates hidden water leaks, avoids repeated waterproofing, and reduces economic losses.
Smart Images

Figure CN224148907U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a building anti-leakage device, and more particularly to a leak-proof drain for bathrooms, kitchens and balconies. Background Technology
[0002] As is well known, bathroom water leaks can originate from various sources, including daily water supply leaks from the floor, leaks from broken floor drains, leaks from burst drain pipes, leaks from pipe joints, leaks from toilet flushing, leaks from concealed toilet pipes, and leaks from the sink drain. These numerous hidden water sources leak into the mortar layer and the sunken bathroom. Water accumulates in the sunken bathroom and is sealed by waterproofing, but the leaking water slowly rises in the pool, seeping into the dry mortar layer, causing leaks in the floor slab structure, leading to mold growth on the walls and dampness that affects the floors below. Many urban buildings in my country use sunken bathrooms with in-floor drainage. This involves applying a layer of waterproofing material to the sunken floor, then filling it with sand and gravel to form a backfill layer, and finally creating a surface layer on top of this backfill layer for waterproofing. Water pipes are then buried within the backfill layer to drain the water into the sewer system. To test the reliability of bathroom waterproofing, a layer of water is usually added to the backfill layer (for a seepage test). After at least 12 hours, the floor below is checked for leaks. Bathroom renovations can only proceed after confirming there are no leaks. However, after a building has been in use for some time, leaks may sometimes be found on different floors, especially at pipe connections and corners. This necessitates redoing the bathroom waterproofing, causing inconvenience and financial loss for residents. Especially when leaks are discovered on the roof of a lower floor, in addition to requiring redoing the waterproofing for that floor, it also causes significant inconvenience to the residents on the lower floors and increases their financial burden. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides an integrated isolation drainage and waterproof device that is not only simple in structure and easy to manufacture and construct, but also effectively and permanently ensures that there is no water leakage at the places in contact with pipes and at corners (wall corners) in the bathroom.
[0004] The technical solution adopted by this utility model to solve the technical problem is: a building bathroom seepage water integrated isolation drainage and waterproof device, which includes a drainage pipe set at the upper end of the sewage pipe pre-embedded in the floor, a PVC floor sealing plate set on the inclined surface of the floor, a stainless steel filter plate set on the PVC floor sealing plate, the inner end of the PVC floor sealing plate set on the periphery of the stainless steel filter plate, and the outer end connected to the inner side of the wall. A water overflow cover is fixedly set in the middle of the PVC floor sealing plate, the periphery of the water overflow cover is pressed against the PVC floor sealing plate, the upper end of the water overflow cover has grid holes, the cavity between the water overflow cover and the stainless steel filter plate is filled with a geotextile layer, the upper end of the water overflow cover is sealed and connected to the floor drain seat, and a PVC side sealing plate is set on the inner side of the wall. The lower end and the side of the PVC side sealing plate have a bent connecting edge, which enables the PVC side sealing plate to achieve electrofusion sealing and bonding with the outer end of the PVC floor sealing plate and to achieve electrofusion sealing connection between the PVC side sealing plates at the corner of the wall.
[0005] The sewage pipe is L-shaped, and a sewage pipe check valve is installed at the lower end where the sewage pipe connects to the main drainage pipe. The PVC floor sealing plate and PVC side sealing plate are PVC waterproof membrane.
[0006] The geotextile layer is made of a woven or knitted permeable synthetic material with good water conductivity. It can form drainage channels inside the soil to drain excess liquid and gas from the soil structure. The overflow hood is made of stainless steel.
[0007] This utility model is available in various models and specifications, including the 16035 integrated drainage diverter, the 11026 integrated drainage diverter, the 7526 integrated drainage diverter, and the 5022 integrated drainage diverter. It can be used as an integrated drainage and waterproofing device for buildings, roofs, bathrooms, kitchens, and balconies. The 16035 model can also be used as an integrated building ventilation, heat dissipation, drainage, and fresh air diversion system for building floors. The lower end of the diversion pipe is inserted into a sewage pipe pre-embedded in the floor, and the upper end is a flange with a flared opening.
[0008] The installation steps for this utility model are as follows:
[0009] First, select and install matching pipe fittings according to the specifications of the pre-buried pipes.
[0010] 2. Insert a diversion pipe into the upper end of the pre-embedded sewage pipe in the floor. Lay a stainless steel filter plate on the upper surface of the diversion pipe. The overlap width between the stainless steel filter plate and the upper surface of the diversion pipe should be 10-20 mm. The mesh size of the stainless steel filter plate should be 8-15.
[0011] Third, lay PVC floor sealing boards on the floor surface with a slope of 3% (mortar surface). The inner square hole of the PVC floor sealing board is pressed against the stainless steel, and the outer end extends integrally to the inner side of the wall.
[0012] 4. Place a water overflow cover in the middle of the PVC floor sealing board, with the perimeter of the water overflow cover pressed against the PVC floor sealing board, and the pressing edge width is greater than 15 mm.
[0013] 5. A PVC side sealing panel is installed on the inner side of the wall. The lower end of the PVC side sealing panel has an integral bent connecting edge. The connecting edge is connected and sealed to the outer edge of the PVC floor sealing panel and the PVC side sealing panel by electrofusion bonding.
[0014] 6. Seal the upper end of the overflow cover to the drain seat with adhesive, then form a backfill layer between the PVC floor sealing board and the PVC side sealing board, then form a ground mortar layer on the backfill layer with the same height as the PVC side sealing board, and finally lay the floor tiles on the ground mortar layer.
[0015] This invention has two main advantages. First, it uses electrofusion bonding between PVC floor sealing panels and PVC side sealing panels at wall corners. The PVC side sealing panels are pressed against the inner side of the wall and extend to the mortar layer on the ground, effectively preventing water seepage into the floor from the wall sides and corners. Second, the pressing and sealing between the lower part of the PVC floor sealing panel and the perimeter of the overflow hood, the pressing and sealing around the drainage pipe, and the pressing and sealing between the upper part of the PVC floor sealing panel and the perimeter of the overflow hood effectively prevent water seepage into the floor from the points of contact with the pipes. This invention allows for long-term downstream drainage of seepage water from the sink, ensuring the backfill layer of the sink is free of water accumulation and preventing any hidden water leaks or moisture in the entire floor slab mortar layer. This keeps the mortar layer dry, eliminates leakage, and prevents water seepage into the mortar layer from the foundation surface, thus preventing building leaks.
[0016] This utility model is not only simple in structure and easy to manufacture and construct, but it can also effectively prevent seepage water from penetrating into the bathroom floor, effectively solving the potential leakage and waterproofing problems at the contact points between the bathroom and the pipes and at corners in apartment buildings. Attached Figure Description
[0017] Figure 1 A reference diagram for drainage of seepage from the backfill layer of a bathroom sunken pool in existing technology.
[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention installed on a floor surface.
[0019] Figure 3 yes Figure 2A schematic diagram of the AA cross-sectional structure.
[0020] Figure 4 This is a structural diagram of the replaced sewage pipes.
[0021] Figure 5 This is a diagram of the existing curved sewage pipe.
[0022] In the diagram, 1. Floor space; 2. Stainless steel filter plate; 3. PVC side sealing plate; 4. Floor tiles; 5. Water overflow cover; 6. Floor drain cover; 7. Geotextile layer; 8. Floor drain seat; 9. PVC floor sealing plate; 10. Backfill layer; 11. Connecting edge; 12. Wall; 13. Drainage pipe; 14. Floor; 15. Main drainage pipe; 16. Sewage drain check valve; 17. Cleaning hole; 18. Sewage drain pipe; 19. Ground mortar layer; 20. Grid hole; 21. Connecting pipe. Detailed Implementation
[0023] Figure 1 A reference diagram for drainage of seepage from the backfill layer of the sunken pool in a bathroom (kitchen) in existing technology.
[0024] exist Figure 2 and Figure 3A building bathroom seepage prevention and drainage waterproofing device includes a drainage pipe 13 (plastic pipe) installed at the upper end (short pipe) of a sewage pipe 18 pre-embedded in the floor 14. The upper end of the drainage pipe is a flange with a flared opening, and the lower end of the drainage pipe is movably inserted into the upper end of the sewage pipe. A PVC floor sealing plate 9 is installed on the inclined surface (3% slope) of the floor. A stainless steel filter plate 2 (8-15 mesh size) is installed at the upper end of the drainage pipe. The inner end of the PVC floor sealing plate has a square hole, and the four sides of the square hole are pressed against the periphery of the stainless steel filter plate (pressing edge width 10-20 mm). The outer end of the PVC floor sealing plate is connected to the inner side of the wall 12. A stainless steel stamping is installed in the middle of the PVC floor sealing plate. The water overflow cover 5 is formed by pressing the lower perimeter of the water overflow cover onto the PVC floor sealing plate (the pressing edge width is greater than 15 mm) and fixing it to the floor with fixing screws (expansion screws). The upper end of the water overflow cover has grid holes 20, which are parallel flat rectangles (or grid holes in a cross shape). The geotextile layer 7 is placed in the cavity between the water overflow cover and the stainless steel filter plate. The upper end of the water overflow cover is connected to the drain seat 8 with adhesive sealant. The four inner sides of the wall are provided with PVC side sealing plates 3. The lower end of each PVC side sealing plate has an integral bent connecting edge 11. The connecting edge and the four outer ends of the PVC floor sealing plate are electrofused to achieve the sealing of the four horizontal corners of the floor and the wall. The PVC side sealing panels are used to waterproof the four corners (vertical corners) by electrofusion sealing the connection edges of the PVC floor sealing panels and PVC side sealing panels, similar to the method used for PVC floor sealing panels. A backfill layer 10 is made of sand and gravel within the floor space 1. The PVC floor sealing panels and PVC side sealing panels are compacted and sealed together with the backfill layer to fix the overflow cover 5 and the drain seat 8. A drain cover 6, flush with the floor tiles 4, is movably installed on the top of the drain seat. A floor mortar layer 19 is laid on the backfill layer, and then floor tiles 4 are laid on the floor mortar layer. The upper end of the PVC side sealing panels extends onto the floor mortar layer, and the drain cover is located on top of the drain seat. The sewage pipe is L-shaped. The upper end (short pipe) of the sewage pipe is embedded in the middle of the floor, and the lower end (long pipe) is connected to the main drainage pipe 15. A sewage pipe check valve 16 is installed on the lower end of the sewage pipe. The upper and lower ends of the sewage pipe are connected by an arc. A cleaning hole 17 (equivalent to a sewage discharge valve, used for cleaning when the sewage pipe is blocked) is provided on the arc connection section.
[0025] exist Figure 4 When a sewage pipe becomes clogged and needs replacement, first cut the sewage pipe along the bottom of the floor, remove the sewage pipe, then fix screws (expansion screws) and a colloid sealant to the bottom of the floor to install a connecting pipe 21 with a round flange at the top. Then, install a new L-shaped sewage pipe with a sewage pipe check valve 16 and a cleaning hole 17 at the bottom of the connecting pipe. Alternatively, a sewage pipe with an elbow (such as...) can be directly installed... Figure 5(As shown) It is fitted onto the lower end of the connecting pipe.
Claims
1. A kind of building building toilet permeable water overall isolation drainage drainage waterproof device, it is characterized by: It includes a drainage pipe (13) set at the upper end of the sewage pipe (18) pre-embedded in the floor (14), a PVC floor sealing plate (9) is set on the inclined surface of the floor, a stainless steel filter plate (2) is set on the PVC floor sealing plate, the inner end of the PVC floor sealing plate is set on the periphery of the stainless steel filter plate, and the outer end is connected to the inner side of the wall (12). A water overflow cover (5) is fixedly set in the middle of the PVC floor sealing plate, the periphery of the water overflow cover is pressed against the PVC floor sealing plate, the upper end of the water overflow cover has a grid hole (20), a geotextile layer (7) is set in the cavity between the water overflow cover and the stainless steel filter plate, the upper end of the water overflow cover is sealed to the floor drain seat (8), a PVC side sealing plate (3) is set on the inner side of the wall, the lower end and the side of the PVC side sealing plate have a bent connecting edge (11), the connecting edge enables the PVC side sealing plate and the outer end of the PVC floor sealing plate to achieve electrofusion sealing bonding and the PVC side sealing plate to achieve electrofusion sealing connection at the corner of the wall.
2. The whole building bathroom water penetration isolation drainage drainage waterproof device according to claim 1, characterized in that: A sewage pipe check valve (16) is provided at the lower end of the sewage pipe. The upper and lower ends of the sewage pipe are connected by an arc, and a cleaning hole (17) is provided on the arc connection section.
3. The whole building bathroom water penetration isolation drainage drainage waterproof device according to claim 1, characterized in that: When the sewage pipe is blocked and needs to be replaced, first cut off the sewage pipe along the bottom of the floor, remove the sewage pipe, and then install a connecting pipe (21) with a round flange at the top on the bottom of the floor using fixing screws and colloid sealant. Then install an L-shaped sewage pipe with a sewage pipe check valve and cleaning hole (17) at the bottom of the connecting pipe.