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Moving Toilet Pipes to the Opposite Side

Admin October 06, 2026

Moving toilet pipes to the opposite side can be achieved through three methods: short-distance relocation, long-distance relocation, and handling special scenarios. The appropriate method should be selected based on the relocation distance and scenario, with strict attention to construction details.

Short-Distance Relocation (within 10cm~20cm)

  • Using a Specialized Toilet Relocator: Adjust the position by extending the drainage pipe interface, ensuring correct installation. Slope control is crucial; after relocation, the pipe should maintain a slope of 1% to 2% (a drop of 1 to 2 cm per meter) to prevent water stagnation. Sealing treatment requires using specialized glue or sealing rings to seal the interfaces and prevent leaks. Waterproofing enhancement involves creating a waterproof layer on the ground around the relocator and extending it up the wall by at least 30 cm. Experts recommend that the relocation distance using a relocator should not exceed 15 cm, which is the optimal distance for ensuring smooth drainage and minimizing blockages. If the distance exceeds 15 cm, the risk of blockages increases significantly.

Long-Distance Relocation (over 20cm)

  • Raising the Floor and Installing a Trap: Raise the floor at the original drainage outlet (approximately 10 to 15 cm) and install a trap to form a water seal, preventing foul odors from returning. This method requires re-laying floor tiles and may affect the indoor ceiling height.
  • Adjusting the Floor Slab and Re-routing Pipes: If conditions permit, the floor slab can be broken (with the consent of the property management or neighbors) to re-route the drainage pipes directly to the main drainage stack. This method is costly and time-consuming but provides the most stable drainage effect.
  • Wall-mounted Toilet: The drainage pipe connects directly to the main pipeline, offering flexible relocation and minimizing blockages. It is aesthetically pleasing and space-saving.

Construction Precautions

  • Slope Priority: Regardless of short-distance or long-distance relocation, the pipe slope is crucial. A slope that is too small can cause blockages, while a slope that is too large may result in excessive scouring force, leading to seal failure.
  • Sealing Inspection: All interfaces should be fixed with PVC glue or rubber sealing rings. After construction, a closed-water test should be conducted (filling water to 2 cm above the ground and maintaining it for 24 hours without leaks).
  • Waterproofing Treatment: The relocated area's ground and walls should be coated with waterproofing paint and subjected to a 48-hour closed-water test to ensure no leaks before laying floor tiles.
  • Drainage Test: After installation, multiple drainage tests should be conducted to observe the water flow speed and ensure smooth drainage.

Risk Warning: Relocating pipes horizontally changes their direction and length, potentially affecting water flow speed and direction, leading to poor drainage and increased blockage risks. If the relocation distance is too long (e.g., over 30 cm), the risk of blockages increases significantly, and it may even be necessary to break open the floor tiles and re-route the pipes. It is advisable to consult professional construction personnel first to ensure the long-term stable operation of the drainage system.