How to Install Mobile Public Toilets

The installation of mobile public toilets requires following a scientific process, covering four core steps: site assessment, structural fixation, functional connection, and overall verification. Here are the specific steps:

1. Site Assessment: Laying the Safety Foundation
Before installation, a comprehensive measurement of the designated area is required:

• Levelness Detection: Use a laser level or water level to measure the flatness of the ground, with an error tolerance of within ±5mm, to avoid uneven stress on the toilet structure due to ground inclination, which may cause box deformation or loosening of connecting parts over long-term use.
• Soil Bearing Capacity Analysis: Determine the soil bearing capacity through geological surveys or simple load tests (such as static pressure tests with road rollers). If the bearing capacity is lower than the toilet's design load (usually 2-3 tons per square meter), a 10-15cm thick C20 concrete foundation should be poured to distribute the load and prevent settlement.
• Underground Pipeline Inspection: Contact municipal departments to obtain underground pipeline maps and use pipeline detectors to confirm the locations of sewage pipes, cables, gas pipelines, etc., to avoid damaging pipelines during installation.
• Spatial Scale Planning: Reserve a passage at least 1.5 meters wide for septic tank cleaning vehicles and ensure that the toilet maintains a distance of more than 0.5 meters from surrounding buildings and trees to meet ventilation and fire safety requirements.

2. Main Structure Positioning and Fixation: Ensuring Stability
Choose the fixation method according to the toilet type:

• Standalone Eco-Friendly Toilets: Hoist the box onto a prefabricated foundation or adjustable legs and rigidly connect it with M12-M16 bolts. The bolts should be embedded into the foundation to a depth of not less than 80mm and coated with anti-rust paint. The adjustable range of the leg height is usually ±50mm to accommodate slight ground undulations.
• Toilets Connected to Municipal Sewage Networks: Before positioning the box, pre-lay DN110-DN160 sewage pipes with a slope controlled at 1%-2% (i.e., a drop of 1-2cm per meter) to ensure natural sewage discharge. The pipe connections should be sealed with rubber gaskets or hot-melt welding and undergo a closed-water test (24 hours of water injection without leakage).
• Modular Assembly Toilets: Assemble the inner corner pieces in the order specified in the instructions, align the wall panels after inserting them into the slots, drill holes with a 4.2mm drill bit at the preset positions, insert Φ4mm rivets, and fix them with a rivet gun. The assembly gaps should be controlled at ≤2mm to prevent rainwater infiltration.

3. Internal Functional System Connection and Inspection: Ensuring Operation

• Water Supply Piping: Install PPR pipes or galvanized steel pipes. In northern regions, wrap them with a 5cm thick rubber-plastic insulation layer to prevent freezing. Install a pressure-reducing valve at the end (outlet pressure ≤0.3MPa).
• Electrical Wiring: Use BV-2.5mm² copper wires. All sockets should be equipped with waterproof boxes. The main distribution box should be installed with a leakage protector (operating current ≤30mA) and the grounding resistance should be ≤4Ω.
• Ventilation System: The exhaust fan should have a air volume of ≥300m³/h. The distance between the air inlet and outlet should be ≥1.5 meters to avoid airflow short-circuiting.
• Wastewater Treatment Unit: If equipped with a biochemical treatment device, add activated sludge and start the aeration pump for 48 hours. The effluent should have a COD ≤100mg/L and ammonia nitrogen ≤15mg/L before it can be put into use.

4. Overall Verification and Adaptive Fine-Tuning: Optimizing Experience

• Functional Testing: Open and close the door lock 50 times continuously and flush the toilet 20 times to check the brightness of the lights (≥150lx) and the noise level of the exhaust fan (≤55dB).
• Structural Reinforcement: Conduct a 100kg static load test on the handrails. The shelf should have a load-bearing capacity of ≥5kg. The slope of ramps should be ≤1:12 (i.e., a height of 1 meter corresponds to a length of 12 meters).
• Safety Signage: Post warning signs such as 'Slippery When Wet' and 'Barrier-Free Access' on the exterior of the toilet. Install lighting with a brightness of ≥50cd/m² at night.

By following these steps, mobile public toilets can be ensured to operate safely, stably, and efficiently, meeting public usage needs.