Mobile Toilet Drain Pipe Installation

The installation of drain pipes for mobile toilets should be carried out according to standardized procedures to ensure smooth drainage and no leakage. The specific process is as follows:

I. Standard Installation Steps

1. Preparation

   • Materials and Tools: Select PVC drain pipes that match the drainage outlets of sanitary fixtures (usually with diameters of 50mm or 110mm). Prepare pipe fittings such as elbows, tees, and straight connectors, as well as PVC-specific adhesive, tape measures, handsaws, sandpaper, and other tools.
   • Planning and Design: Determine the drainage path based on the bathroom layout. The pipes should maintain a slope of 2%-5% (i.e., a drop of 2-5 cm per meter) to prevent water accumulation. For example, the toilet drain pipe should lead directly to the main riser, while the branch pipes for the sink and floor drain should be connected independently.

2. Measurement and Cutting
   Use a tape measure to measure the length of the pipe, mark it, and then cut it with a handsaw or pipe cutter to ensure a perpendicular and smooth cut. Sand the burrs inside and outside the pipe ends to prevent scratching the sealing ring or affecting the adhesive bond.

3. Connecting Pipe Fittings
   Apply PVC adhesive evenly on the outside of the pipe spigot and the inside of the fitting socket. Quickly insert and rotate 90 degrees, maintaining pressure for 10-15 seconds until initial curing. All connections must be fully covered with adhesive to prevent leakage.

4. Installing the Main Pipe
   Drill holes along the planned path on the floor or wall and secure the main pipe with pipe clamps, placing a fixing point every 1.5-2 meters. Adjust the slope and check again to ensure it meets the design requirements.

5. Connecting Branches and Sanitary Fixtures

   • Toilet: Connect to the drainage outlet through a flange ring (made of wax or rubber). The flange ring should be tightly pressed against the floor to prevent odor backflow.
   • Sink and Floor Drain: Connect the branch pipes with hoses or PVC pipes, adding rubber gaskets at the joints and tightening them with pipe clamps to ensure a tight seal.

6. Inspection and Testing
   Visually inspect all connections for firmness and ensure the pipes are not deformed. During the water flow test, observe the drainage speed and check for leaks, focusing on the toilet flange ring and floor drain connections.

II. Key Points for Installing Drain Pipes in Relocated Bathrooms

If relocation is required, pay extra attention to the following:

1. Removing Old Pipes: Cut off the old pipes with pipe wrenches and clean out any debris inside the pipes to prevent clogging the new pipes.
2. Precise Positioning: Measure the new pipe positions according to the new design drawings to ensure alignment with fixtures such as the toilet and sink.
3. Drilling and Fixing: When drilling holes in the floor or wall, avoid damaging the original waterproof layer. After installing the new pipes, seal the holes with cement or waterproof adhesive.
4. Ventilation Treatment: After relocation, install a ventilation pipe to prevent negative pressure from causing sewage backflow during drainage.

Tip: It is recommended to conduct a 24-hour closed-water test after installation to observe for any signs of water leakage on the ceiling or wall of the floor below, ensuring long-term safety in use.