How to Move Toilet Drain Pipes

Toilet drain pipes can be moved, but appropriate methods must be selected based on the relocation distance, and construction specifications must be strictly followed. The specific operations are as follows:

I. Short-Distance Relocation (within 40 cm)

1. Use Specialized Relocation Devices
   It is recommended to use flat or round relocation devices to adjust the position by extending the drain pipe interface. If the relocation distance is within 10-20 cm, a toilet relocation device can be directly used, which is designed to fit most toilet drain outlets.
   Key Requirements: After relocation, the pipe must maintain a slope of 1%-2% (i.e., a drop of 1-2 cm per meter) to ensure smooth drainage; the interface must be fixed with PVC specialized glue or rubber sealing rings to prevent leakage.

2. Waterproofing and Sealing Treatment
   The ground around the relocation device must be coated with waterproof paint and extended to the wall for at least 30 cm to form a continuous waterproof layer. After construction, a closed-water test must be conducted: fill water to a height of 2 cm on the ground and maintain it for 24 hours without leakage before proceeding with subsequent work.

II. Long-Distance Relocation (over 40 cm)

1. Raise the Ground and Install a Water Trap
   Raise the ground by 10-15 cm at the original drain outlet position and install a water trap to form a water seal, blocking the backflow of odors. This method requires re-laying floor tiles and is suitable for scenarios where the impact on floor height is not sensitive.
   Note: The water trap must be made of PVC material that meets national standards, and the slope must be strictly controlled within the range of 1%-2%.

2. Adjust the Floor Slab and Re-lay Pipes
   Destroy the original floor slab, re-lay the drain pipes, and connect them directly to the main drain riser. This solution provides the most stable drainage effect but must meet the following conditions:

   • Obtain written consent from the property management and neighbors (when involving inter-floor drainage);
   • Bear higher costs (including floor slab repair, waterproofing treatment, etc.) and a longer construction period;
   • The construction team must have professional qualifications to avoid damaging the building structure.

III. Key Construction Considerations

1. Slope Control
   A slope that is too small can easily lead to sewage stagnation and blockage, while a slope that is too large may cause sealing failure due to excessive scouring force. It is recommended to use a level to assist in construction to ensure accurate drop height per meter.

2. Sealing Verification
   All interfaces must be doubly sealed: first, use PVC glue for bonding, and then wrap with Teflon tape or install rubber sealing rings. After construction, conduct a 48-hour closed-water test, focusing on checking the junction between the relocation area and the floor slab.

3. Special Scenario Handling

   • Sunken Bathrooms: The pipeline layout can be freely renovated, but cast iron pipes must be fixed with clamps and coated with sealant;
   • Same-Floor Drainage: There is no need to destroy the floor slab, and the pipeline position can be directly adjusted;
   • Inter-Floor Drainage: Written consent from the property management and neighbors must be obtained to avoid later disputes.