Rural Mobile Toilet Flush Pipe

The selection of flush pipes for rural mobile toilets requires comprehensive consideration of material, specifications, and adaptability. Here are specific suggestions:

1. Material Selection The material of flush pipes for rural mobile toilets should balance durability and cost. Common materials include high-density polyethylene (HDPE), polypropylene (PP), and polyvinyl chloride (PVC).

• HDPE: It has strong impact resistance and is resistant to low temperatures, making it suitable for cold regions in the north, but it comes with a higher cost.
• PP: It has good corrosion resistance and is lightweight, but its high-temperature resistance is average, making it suitable for regions with mild climates.
• PVC: It is low-cost and easy to install, but its aging resistance is weak. It is prone to embrittlement when exposed to sunlight for a long time and requires sun protection measures.

2. Specifications of the Flush Pipe for the Squat Toilet Water Tank

• Diameter: DN32 (32 millimeters in diameter) is the recommended specification. A diameter that is too thin (such as DN25) will result in insufficient flushing force and is prone to clogging; a diameter that is too thick (such as DN40) will cause the water in the tank to drain quickly, increasing water consumption. DN32 can balance flushing force and water conservation needs.
• Length: There is no fixed standard. It needs to be measured and cut on-site according to the actual distance between the water tank and the toilet to avoid excessive length causing bending or insufficient length preventing connection.
• Connecting Fittings: A 32×65 rubber bowl is required at the toilet end. Its elasticity ensures a leak-proof seal and buffers water pressure to prevent interface loosening due to pressure fluctuations.

3. Adaptability of the Water Tank Inlet and Outlet

• Inlet: The diameter is usually 25 millimeters or 29 millimeters.
  • For old residential areas or areas with unstable water pressure, it is recommended to choose 25 millimeters to avoid overflow of the water tank due to excessive water inflow.
  • When the water pressure exceeds 0.3 MPa, a 29-millimeter inlet should be selected and a pressure relief valve should be installed to prevent high pressure from damaging the internal structure of the water tank.
• Outlet: A 65-millimeter outlet is suitable for ordinary households, with moderate flushing force and low noise; if stronger flushing force is required (such as in public places), an 81-millimeter outlet can be selected, but the number of pipe bends downstairs needs to be confirmed. When there are too many bends, large-diameter drainage may cause dirty water to flow back, and an anti-backflow device needs to be installed.

4. Key Points of the Overall Design of the Drainage Pipe The drainage pipes of rural mobile toilets need to consider mobility and stability. It is recommended to choose pipes with a wall thickness of 2.0 mm - 10 mm. Pipes with a wall thickness that is too thin are prone to deformation, while those that are too thick increase weight. The pipe layout should minimize bends to avoid clogging risks; if buried installation is required, UV-resistant materials should be selected or protective sleeves should be installed to extend the service life.