Is the Toilet Floor Drain Movable?

The toilet floor drain can be moved, but moving it involves many issues and requires careful operation.

Moving Methods

• If the downstairs area is unrenovated, you can discuss with the downstairs residents to break through the floor slab and connect it to the main sewer. This method is relatively straightforward, but it requires agreement from the downstairs residents, and the construction process may have some impact on the downstairs area.
• If the downstairs area is already renovated, you need to cut a groove in the floor and connect the floor drain opening to the original sewer position. The newly modified floor drain opening should be slightly higher than the original one to ensure a certain slope, which is conducive to smooth drainage. After modification, proper waterproofing must be done to prevent leakage issues that could affect the downstairs residents.

Difficulties and Risks

• Odor Prevention Issues: When moving the floor drain, the pipe runs close to the floor, and the pipe diameter is limited, usually a 40mm pipe that is 4cm high. To make the floor drain flush with the floor, the elbow is often cut in half, making it impossible to add an odor prevention device. This can easily lead to backflow of odors, affecting indoor air quality.
• Clogging Issues: If the floor drain is not moved properly, it is prone to clogging. Once clogged, it will not only affect normal use but also make subsequent modifications very troublesome, possibly requiring re-cutting of grooves and laying of pipes.
• Applicability Limitations: Not all bathrooms can have their floor drains moved. Many old houses do not have the sewer conditions to support it, and forced relocation can easily cause problems. For example, if the original sewer is a cast-iron pipe, the relocation distance should not exceed 30cm; for commercial housing built after 2000 with PVC sewers, the maximum relocation distance is 1m. Relocation should avoid the joints of the main sewer pipes and should not be done in the direction opposite to the slope of the main sewer. At the same time, confirm the allowable height for floor elevation. Relocation requires running pipes, and the floor must be raised by at least 3cm, with more lenient requirements for sunken bathrooms.