Mobile Toilet Bottom Pipe Design
In the design of the bottom pipes for mobile toilets, the relocation of the toilet bowl requires comprehensive consideration of drainage methods, pipe selection, inclination, relocation distance, and relocation methods for different floors.
Drainage Methods: There are two types of drainage methods for bathrooms: sunken and non-sunken (inter-floor drainage). In sunken bathrooms, the drainage pipes are laid at the bottom of the sunken area, making relocation relatively convenient as the pipe positions can be adjusted flexibly according to needs. In non-sunken bathrooms, the toilet's drainage pipe is located downstairs, making relocation more complex and involving coordination with downstairs residents and the re-laying of pipes.
Pipe Selection for Relocation: When relocating the toilet bowl, it is advisable to use 110 round pipes instead of 110 flat pipes whenever possible. However, due to height limitations for tile laying, 110 flat pipes are often used. These pipes have an overall thickness of 60-70mm and, when combined with ground grooving, do not add extra height for tile laying in the bathroom, making them a commonly used pipe material for toilet relocation.
Inclination of Flat Pipes: The inclination of flat pipes significantly affects drainage efficiency. According to, the slope of 110mm pipes should be 0.6%–1.2%, meaning the height difference between the two ends of a 1-meter pipe should be 12mm. During construction, the slope must be precisely controlled to prevent blockages later on.
Relocation Distance: The relocation distance should be as short as possible. The longer the distance, the higher the requirement for slope accuracy, the slower the water flow, and the easier it is for debris to accumulate. Additionally, the number of pipe bends should be minimized, and straight-line relocation should be used whenever possible. Each additional 90° bend increases water flow resistance equivalent to extending the straight pipe by 1.5 meters, making it easier for debris to get stuck at the bends. For short-distance toilet relocation, a ready-made relocation device can be purchased; for distances exceeding 20cm, a plumber may need to cut the flat pipe on-site and adjust the drainage slope.
Inter-floor Toilet Relocation: For short-distance relocation, a relocation device can be used, which generally allows for relocation of about forty centimeters without issues. However, the height of the flat pipe in the relocation device is about 4 centimeters, which will raise the floor. If there is no underfloor heating, the floor can be lowered to accommodate the flat pipe; if there is underfloor heating, the overall floor height may be raised, and it is advisable to keep the relocation distance within forty centimeters to prevent blockages later on. Wall-mounted toilets can accommodate long-distance relocation without worrying about blockages later on, but laying the pipes on the ground will increase the floor height. Raising the floor for relocation is suitable for long-distance relocation and requires a slope to ensure smooth drainage, which can be achieved by building a new platform in the toilet area.
