Mobile Toilet Drainage Location

The drainage location of a mobile toilet should be selected based on the drainage type (same-floor drainage or inter-floor drainage) and the actual situation, as detailed below:

Same-Floor Drainage

1. Floor Slab Lowering
If the bathroom's architectural structure already has a lowered floor slab (with the floor recessed by 250mm-350mm), toilet and other drain outlets can be freely arranged. When re-planning the drainage pipes, it is recommended to use oblique tees for connections to avoid blockages caused by right-angle bends. This method is suitable for overall bathroom renovations and does not require additional floor elevation, but it is necessary to confirm whether the depth of the lowered slab meets the requirements for pipe laying.

2. Floor Slab Elevation
Abandon the original drainage outlet and construct a raised platform 180mm-200mm high using lightweight blocks (such as aerated concrete blocks). Pre-embed a toilet drainage pipe with a diameter of approximately 110mm and then lay horizontal floor tiles. This method allows for long-distance movement and flexible layout, but the height of the platform may affect the use by the elderly or those with mobility issues, and the workload is significant (requiring multiple processes such as masonry, plastering, and waterproofing).

3. Offset Connector
Suitable for short-distance (100mm-350mm) relocation, preferably not exceeding 400mm. The operation steps are as follows: Chisel out 20mm-40mm of the floor slab, pre-embed a finished offset connector (with one end connected to the original toilet pipe and the other end extending to the target location), pour the floor, apply waterproofing, lay tiles, and then install the toilet. If the relocation distance exceeds 300mm, a slope of more than 3% should be set at the pre-embedded location to ensure smooth drainage and prevent water accumulation.

Inter-Floor Drainage

1. Drainage Modification from the Floor Below
This requires negotiation with the neighbor below to open a new hole in their bathroom ceiling and lay drainage pipes. After modification, a waterproof layer should be applied and a trap installed (to prevent odor backflow). This method allows for unlimited relocation distance and flexible layout, but it depends on the neighbor's cooperation and may damage their decor, requiring careful communication.

2. Wall-Hung Drainage
Construct a steel structure inside the bathroom, embed the water tank within it, and hang the toilet on the steel structure with the drainage pipe laid along the wall. This method allows for significant movement distance and results in an aesthetically pleasing finish (with no exposed pipes on the floor) that is easy to clean. However, it is necessary to ensure that the drainage pipe can extend to the target location (which may be restricted if it cannot pass through load-bearing walls), and the steel structure should be properly rust-proofed.

3. Offset Connector
Similar to same-floor drainage, but the relocation distance is recommended to be controlled within 30 centimeters and should not exceed 1 meter. During operation, ensure tight pipe connections to prevent leakage, and the slope should meet drainage requirements (usually not less than 2%). This method is suitable for minor adjustments to the toilet position, but long-distance relocation increases the risk of blockages.