Mobile Toilet Drainage Location Illustration

The drainage location of mobile toilets varies depending on the drainage method. Here is the relevant textual explanation:

Same-floor drainage (sunken bathroom):
In a same-floor drainage system, the drainage pipes are located inside your own bathroom, and the floor is typically about 40 cm lower than the floor level. This design makes it relatively convenient to modify the pipes, as you can directly adjust the drainage layout by shifting or changing the position of the drainage pipes. Since the pipes do not pass through the floor slab, there is no need to coordinate with the downstairs neighbors, resulting in high construction flexibility.

Inter-floor drainage:
The pipes in inter-floor drainage pass through the floor slab and are located on the ceiling of the bathroom of the downstairs neighbors. If relocation is required, the following methods should be selected according to the actual situation:

1. Using a pipe relocator:
   Suitable for short-distance relocation (generally not exceeding 2 m), it is necessary to raise the floor slab to create a drainage slope and prevent blockages. After installing the pipe relocator, it is recommended that the slope be no less than 0.6% (i.e., a height difference of 6 mm between the two ends of a 1-meter pipe) to ensure smooth drainage.
2. Changing from floor drainage to wall drainage:
   Connect the toilet's sewage outlet directly to the riser. The toilet can only be moved to the wall adjacent to the riser and not to the opposite side. This method is less prone to blockages after modification and is suitable for both same-floor and inter-floor drainage. However, it requires the construction of a false wall to hide the pipes, which can be combined with niche design to increase storage space.
3. Directly modifying the sewage pipes in the neighbor's home:
   If the downstairs neighbors agree, you can directly adjust the position of the pipes on the ceiling of their bathroom. The modification difficulty is low, but the coordination difficulty is high, and it is rarely used in practice.
4. Raising the floor:
   By removing the base layer of the rough floor (3-10 cm) or using underfloor heating to raise the floor (6-10 cm), space is reserved for the pipe slope (a total height of 9-13 cm is required). This method may result in an excessively high floor, making it inconvenient to use and prone to tripping, so it should be selected with caution.
5. Using flat pipes:
   The thickness of an 110 mm flat pipe is about 60-70 mm. When used in conjunction with floor grooving, it can reduce the increase in tile-laying height. When relocating, it must comply with the slope standard (0.6%-1.2%), and the shorter the distance and the fewer the elbows, the better. For short distances (≤20 cm), a finished pipe relocator can be used. For ultra-long distances, the flat pipe needs to be cut on-site and the slope adjusted. It is recommended that the relocation distance not exceed 35 cm.

Precautions:

• When relocating with flat pipes, the simplified value of 0.026 should not be used for slope calculation. The standard must be strictly followed.
• After relocation, a water flow test should be carried out to ensure that there are no leaks or blockages in the drainage.
• When structural modifications are involved, it is recommended to consult a professional plumber or property management to avoid damaging the load-bearing capacity of the floor slab.