Toilet Sunken Tank Relocation

Toilet sunken tank relocation mainly involves the relocation of the toilet in sunken bathrooms, which requires scientific planning based on the relocation range, methods, and construction key points to ensure normal drainage function and compliance with regulations.

1. Relocation Range

Sunken bathrooms are formed by excavating the ground to create a sunken tank, allowing drainage pipes to be laid entirely beneath the home's floor without penetrating the floor slab. Therefore, the toilet position can be adjusted relatively flexibly. The overall lowered floor slab (sunken tank) allows for the arbitrary placement of the toilet position according to actual needs, but a comprehensive assessment must be made in conjunction with spatial layout, drainage slope, and property requirements.

2. Relocation Methods

1. Direct Pipe Modification
   Adjust the direction of the drainage pipes directly within the sunken tank and achieve relocation by relaying PVC pipes. This method is suitable for long-distance adjustments but requires ensuring a reasonable pipe slope to avoid blockages later. During construction, precise measurement of pipe length and angle is necessary, and maintenance access points should be reserved.

2. Relocation Device
   Suitable for short-distance relocations (recommended within 30 centimeters, with a maximum length not exceeding 1 meter). The relocation device achieves relocation by changing the connection position between the toilet's drainage outlet and the main pipe. However, due to the small bending radius of the pipes, it can easily lead to poor drainage. Therefore, the relocation distance must be strictly controlled, and the pipes should be cleaned regularly.

3. Wall-Hung Toilet
   Relocate the toilet position by relaying pipes within the wall or on the ground and transferring the drainage outlet to the wall. This method requires raising the ground or building a platform to ensure a drainage slope (usually a slope of ≥2% is required). Simultaneously, a water tank and pipes need to be embedded in the wall, making the construction more complex but aesthetically pleasing and space-saving.

3. Construction Key Points

1. Drainage Slope
   For every distance the pipes are moved, the height should be lowered (a slope of ≥1% is recommended) to ensure that sewage can naturally flow towards the main pipe. Insufficient slope can easily lead to water accumulation, odors, and even blockages.

2. Secondary Drainage
   The bottom of the sunken tank must be sloped (with a slope of ≥0.5%) and equipped with a secondary drainage floor drain to prevent water accumulation in the sunken tank from seeping into the lower floors or causing structural damage. The floor drain should be connected to the main drainage pipe and cleaned of debris regularly.

3. Backfill Material
   Avoid using construction waste (such as bricks and concrete blocks) and instead use ceramsite, foamed cement, or lightweight aggregate for backfilling. These materials have strong water absorption, are lightweight, can reduce the load on the sunken tank, and lower the risk of water seepage. After backfilling, a steel mesh should be covered to enhance structural stability.

4. Precautions

For large-distance relocations (exceeding 1 meter), carefully evaluate the construction difficulty, cost, and property regulations. Some old residential areas or high-rise buildings may have restrictions on pipe modifications, so it is necessary to communicate with the property management in advance and complete relevant procedures. Additionally, a closed-water test (lasting more than 24 hours) should be conducted after construction to confirm no leakage before proceeding with the next step of decoration.