How to Move a Toilet with a Caisson

The position of the toilet in a bathroom with a caisson can be moved relatively flexibly. The toilet can be repositioned by directly modifying the pipes, but attention should be paid to the distance limit of the relocation to avoid blockage risks.

Relocation Principle and Advantages

A bathroom with a caisson has a structural cavity (caisson) beneath it, allowing the sewage pipes to be fully arranged within the caisson without relying on the public drainage main pipe beneath the floor slab. This design provides a high degree of freedom for adjusting the toilet position: As long as the main drainage riser is not damaged, the toilet can be arranged as needed. For example, if the toilet needs to be moved horizontally from its original position, the sewage pipes can be relaid directly within the caisson, and the drainage can be ensured to be smooth by adjusting the pipe slope. In a bathroom with an overall lowered floor (caisson), the relocation range is basically not limited by space, and a relatively large distance adjustment can be achieved.

Key Points of Relocation Operation

1. Pipe Modification: The core of relocation is to relay the sewage pipes. Ensure that the new pipe extends from the toilet drain outlet to the main drainage riser and maintains sufficient inclination (usually not less than 2%). If the depth of the caisson is sufficient, the starting height of the pipe can be lowered to meet the slope requirement.
2. Relocation Distance Control: It is recommended to control the relocation distance within 30 centimeters, with a maximum of no more than 1 meter. The longer the distance, the longer the horizontal drainage pipe, and the higher the risk of sediment deposition, which can easily lead to blockage. If long-distance relocation is necessary, pipes with a larger diameter (e.g., from 110mm to 160mm) should be selected, and daily cleaning and maintenance should be strengthened.

Precautions

• Avoid Damaging the Main Drainage Riser: The main drainage riser is the core of the building's sewage drainage. During modification, its integrity must be strictly protected; otherwise, leakage may occur or the drainage of other households may be affected.
• Waterproofing Treatment: After relocation, a new waterproof layer should be applied around the pipes in the caisson, and a secondary drainage outlet should be set up to prevent water accumulation and leakage to the floor below.
• Acceptance Test: After the modification is completed, a water flow test should be conducted to observe whether the drainage is smooth and whether there is any leakage, ensuring that the relocation effect meets the usage requirements.

By reasonably planning the pipe layout and controlling the relocation distance, the toilet position in a bathroom with a caisson can be flexibly adjusted, but functionality and safety must be taken into account to avoid subsequent problems caused by improper operation.