Water Inlet Installation for Vehicle-mounted Mobile Toilets

The core steps for installing the water inlet of a vehicle-mounted mobile toilet involve connecting the external water supply pipe, installing a filter, and ensuring the tightness of the connections. Specific operational details need to be adjusted according to the type of toilet.

I. Basic Installation Process (Taking a water-circulating mobile toilet as an example)

1. Connection between the Water Supply Pipe and the Inlet Valve
   Connect the external water supply pipe (such as a municipal water pipe or the water outlet of the vehicle-mounted water tank) to the toilet's inlet valve. The inlet valve is usually located above or on the side of the water storage tank. Ensure that the pipe diameters match (common specifications are DN15-DN25). Use a special clamp or threaded joint for the connection, and avoid excessive wrapping of Teflon tape, which can cause blockages.

2. Connection and Fixation of the Water Storage Tank
   Extend the water supply pipe to the water inlet of the storage tank and use a quick-connect joint or flange for the connection. The storage tank should be placed horizontally and fixed inside the vehicle to prevent shaking during driving. For a high-pressure water supply system, install an exhaust valve on the top of the storage tank to prevent air from being trapped and affecting the water flow.

3. Filter Installation
   Install a filter (recommended precision of 50-100 mesh) at the water inlet end, close to the inlet valve. The filter should be cleaned regularly (every 1-2 weeks) to prevent impurities such as sand and rust from entering the system. If groundwater or non-clean water sources are used, a pre-sedimentation tank should be added.

4. Tightness Inspection
   After completing the connections, slowly open the water supply valve and observe all connections (including the inlet valve, filter, and storage tank connections) for leaks. Apply soapy water to the connections. If bubbles appear, re-tighten or replace the gaskets.

II. Adjustments for Different Types of Toilets

• Direct-discharge toilets: Connect a high-pressure water pump (pressure ≥ 0.3 MPa), and install a one-way valve on the water inlet pipe to prevent sewage backflow.
• Packing toilets: The water inlet is only used for flushing. A liquid level sensor should be installed in the storage tank to prevent overfilling.
• Vacuum toilets: Require an independent high-pressure water source (such as a vehicle-mounted water tank + booster pump). The water inlet pipe should be made of stainless steel to withstand negative pressure.

III. Key Precautions

• Anti-freezing treatment: In northern regions, wrap the pipes with insulation cotton and add antifreeze (ethylene glycol ratio ≤ 30%) to the storage tank.
• Slope design: The water inlet pipe should maintain a slope of 1%-2% to prevent water accumulation and bacterial growth.
• Electrical safety: If an electric water pump is involved, install a separate leakage protection switch, and ensure the grounding resistance is ≤ 4Ω.

After installation, conduct a functional test: Flush continuously 3-5 times to check the stability of the water flow and ensure there is no abnormal noise in the system. If the water pump starts and stops frequently or the water level in the storage tank drops too quickly, check for pipe leaks or sensor failures.