Can the Toilet Pipe Be Moved?

Whether a toilet pipe can be moved depends on the situation. The water supply pipe is relatively easier to move, while moving the sewage pipe is more difficult and comes with many restrictions and risks.

Water Supply Pipe

The water supply pipe is relatively easy to move. It is usually installed inside the walls or above the ground in one's own home. When making changes, the main considerations are the pipe's direction, connection method, and coordination with other facilities. Since its position is mainly within one's own space, it generally does not affect the downstairs residents. For example, during the renovation process, if one wants to change the position of the kitchen or bathroom faucet, as long as the pipe's direction is reasonably planned and an appropriate connection method is chosen, moving the water supply pipe can be relatively easily achieved.

Sewage Pipe

1. Toilet Sewage Pipe: It can be relocated, but there are many restrictions and risks. For short-distance relocation (within 40 centimeters), it is recommended to use a special flat or round pipe shifter, while maintaining a slope of 1%-2% and reducing the number of elbows to prevent blockages. If the relocation exceeds 40 centimeters, the ground needs to be raised by 20 centimeters to lay new pipes. However, there are some risks associated with relocation, such as odor problems if the pipe joints are not properly sealed; the possibility of cutting into steel bars when cutting the ground, which affects the structural safety of the building; and potential water leakage to the downstairs residents if the waterproofing is not redone. After construction, a 48-hour closed water test must be carried out to ensure the waterproofing effect. In special housing types, sunken bathrooms can be freely modified; cast iron pipes need to be clamped tightly with hoops and then covered with sealant; for same-floor drainage, one can make decisions independently, while for cross-floor drainage, approval from the property management and signatures from neighbors are required.
2. Sewage Pipe under the Bathroom Sink: Technically, it can be relocated, usually involving the modification of existing pipes, including cutting, reconnecting, and possibly laying new pipes, which should be done by a professional plumber or renovation company. When relocating, it is important to maintain or re-establish the water seal to maintain drainage efficiency and ensure that the connection points are tightly sealed to prevent water leakage. At the same time, the difficulty and cost of construction should also be considered, as modifying pipes may require damaging part of the walls or floors, increasing renovation costs and construction time.

In general, moving the sewage pipe is more difficult because it is mostly located on the ceiling of the downstairs residents' bathroom. Changes may damage the bathroom's waterproof layer, causing water leakage to the downstairs residents; if it is relocated above one's own floor, although it can avoid damaging the downstairs waterproof layer, it may affect aesthetics and require proper waterproofing to be redone.