Can the Toilet Position Not Be Moved During Bathroom Renovation?

During bathroom renovation, the toilet position can be moved, but it depends on the situation and certain conditions must be met.

Moving Methods

• Short-distance moving: If the moving distance is between 10 and 15 centimeters, a toilet offset flange can be used. It is low-cost, easy to install, and relatively safe.
• Long-distance moving:
  • If the moving distance exceeds 20 centimeters, the floor usually needs to be raised by 12 centimeters to increase the pipe slope and ensure smooth drainage.
  • If you want to move it even further, there are three methods. First, raise the entire floor, build a new platform to bury the pipes. The pipe diameter should be at least 110 millimeters, and the slope should be maintained between 2% and 3%, but this will sacrifice some floor height. Second, change to a wall-mounted drainage system. Build a false wall to make the pipes run along the wall without raising the floor, which is suitable for moving more than 50 centimeters. Third, modify the pipes on the floor below, but this requires the consent of the neighbors and a new waterproofing test. For sunken bathrooms, there is greater flexibility in modification, and the pipes can be directly changed in the backfill layer.

Precautions and Limitations

• Legal regulations: According to the "Residential Design Code" GB 50096 - 2011, bathrooms should not be directly arranged above the bedrooms, living rooms (halls), kitchens, and dining rooms of the lower-floor occupants. According to the "Measures for the Administration of Interior Decoration and Renovation of Residential Buildings", it is prohibited to convert rooms or balconies without waterproofing requirements into bathrooms. Illegal renovations may face fines and require rework and rectification.
• Technical feasibility: When renovating the sewage system, toilets and other sanitary ware need to be connected to sewage pipes with a diameter of 110 mm, and a slope (usually ≥ 2%) must be ensured to avoid blockages. If a flat pipe offset or floor raising is used, insufficient slope may lead to poor drainage or even bad odors. Raising the floor may also make the bathroom higher than other areas, posing a risk of water accumulation and backflow. The new area needs to have a new waterproof layer. The waterproof height should be no less than 1.8 meters, and the number of coats should meet the standard (usually 2 - 3 coats). If the waterproofing is not adequate, it is prone to water leakage. In addition, if the moving distance exceeds 15 centimeters or elbows are used, the risk of blockage will increase.