Renovation: How to Move the Toilet Position
The position of the toilet during renovation can be moved using the following methods, and an appropriate plan should be selected based on actual needs and the house structure:
Use a toilet offset flange Suitable for short-distance relocation (usually 10-30 cm, not exceeding 40 cm). An integrated offset flange is suitable for relocations within 20 cm, while a side-pipe offset flange should have a relocation distance of no more than 50 cm. For every 10 cm of relocation, at least half a centimeter of slope should be reserved to ensure smooth drainage. Its advantages are minimal modification and low cost, but it may affect the flushing effect and increase the risk of blockage. During construction, a slope of 1%-3% should be strictly reserved. If the relocation exceeds 10 cm, it should be used with a straight-flush toilet to avoid poor drainage in a siphon toilet due to pipe bends.
Raise the floor method The drainage pipe is buried by building a platform. The pipe diameter should be at least 110 mm, and the slope should be controlled at 2%-3%. This method requires raising the bathroom floor by 15-20 cm, which will sacrifice some ceiling height. Therefore, houses with low ceiling heights should use this method with caution. During construction, ensure that the platform structure is stable and properly waterproofed to avoid later leakage.
Inter-floor drainage pipe relocation This requires negotiating with the downstairs neighbor to drill holes in the floor slab and rearrange the toilet piping. However, in practice, 99% of downstairs residents will not agree, so the feasibility of this method is extremely low and it is only provided as a theoretical option for reference.
Same-floor drainage renovation In a sunken bathroom (with a sunken box structure), the piping position can be directly adjusted within the backfill layer without damaging the floor slab, offering the highest flexibility. During renovation, ensure that the drainage slope within the sunken box is reasonable, and conduct secondary waterproofing and closed-water tests to prevent water accumulation and leakage.
Wall-mounted (hanging) toilet The piping is laid along the wall without raising the floor, suitable for long-distance relocation (more than 50 cm). The toilet drainage is directly connected to the main vertical pipe. A sloped hole should be reserved in advance, and a niche for storage should be designed above the water tank. However, this method is only suitable for short-distance renovation of the downpipe and requires confirmation that the wall is a non-load-bearing wall or can be reinforced.
Precautions:
- After relocation, test the drainage speed to avoid blockage due to insufficient slope.
- Regularly check the stability of the hidden water tank and bracket of a wall-mounted toilet.
- When structural modifications are involved, report to the property management in advance and confirm the load-bearing safety.
