Toilet Floor Drain Can Be Moved

The toilet floor drain can be moved, but construction must be carried out carefully and in strict accordance with technical specifications; otherwise, issues such as poor drainage, foul odors, and leakage may easily occur. The specific operation points are as follows:

I. Scenarios Necessitating Relocation

1. Rectifying Design Flaws: When the floor drain is blocked by the toilet, located in the center of the bathroom affecting aesthetics or convenience of use, it needs to be moved to a corner. If there is no floor drain in the wet area, the floor drain in the dry area should be moved in. When the floor drain in the shower area is too far from the wall (e.g., in the middle), moving it to a corner can improve drainage efficiency.
2. Meeting Functional Optimization Needs: If the original drain position causes water accumulation or foul odors, or if the layout needs to be adjusted to accommodate furniture placement, relocation can solve the problem.

II. Key Considerations for Relocation Construction

1. Pipe Constraints
   • The relocation pipe should be laid close to the floor, with a typical diameter of 40mm (4 cm in height). To make the floor drain flush with the floor, half of the elbow needs to be cut off, but this operation will prevent the installation of an odor-proof device (such as an S-trap). It is advisable to prioritize relocating the drain from a position that originally has an S-trap, or compensate for the odor-proof function by installing an odor-proof core or choosing a deep-water-seal floor drain.
   • A 40mm diameter requires a dedicated floor drain to avoid poor drainage or leakage due to size mismatch. When purchasing, confirm product compatibility to prevent mistakenly buying a universal floor drain.
2. Priority of Odor Prevention
   • If the original drain has no S-trap, the risk of foul odors after relocation is extremely high. Relocation should be avoided unless absolutely necessary, or the problem can be alleviated by installing an odor-proof core or choosing a deep-water-seal floor drain, although the effect may be limited.

III. Three Pre-relocation Inspections That Must be Conducted

1. Check the Original Sewer Material: In unit family compounds built before the 1990s, most sewers are made of cast iron, and the relocation distance should not exceed 30cm. In commercial housing built after 2000, the sewers are made of PVC, and the maximum relocation distance can be 1m.
2. Measure the Position of the Original Main Sewer Pipe: Relocation should avoid the joints of the main sewer pipe and not move in the direction opposite to the slope of the main pipe.
3. Confirm the Height by which the Floor can be Raised: Relocation requires running pipes, so the floor must be raised by at least 3cm. If it is a sunken bathroom, the requirement can be relaxed.

IV. Standard Construction Process for Floor Drain Relocation

1. Pipe Selection: For relocation distances ≤30cm, use national standard 50 pipes; for distances >30cm, it is recommended to use 75 pipes with a wall thickness of no less than 3mm.
2. Slope Reservation: The industry standard is a slope of 3‰ - 5‰, that is, raise the pipe by 3 - 5mm per meter to ensure fast drainage speed and prevent the accumulation of dirty water and foul odors.
3. Joint Treatment: All pipe joints should be first sealed with rubber rings, then coated with a layer of waterproof glue, and wrapped with 2 layers of waterproof tape to prevent leakage.
4. Testing and Acceptance: After construction, conduct a water filling test first. Pour a bucket of water to observe the drainage speed and whether there is water accumulation. After 15 minutes, check the joints for water leakage. Confirm that there are no issues before proceeding with the next step of construction.