Sewer Pipe for Portable Toilets at Construction Sites

The mainstream specification for sewer pipes of portable toilets at construction sites is dn110mm (φ110), which is suitable for most single-room or low-usage scenarios and complies with the requirement in the 'Code for Construction and Acceptance of Building Drainage Engineering' (GB 50268 - 2008) that the drainage pipe for toilet bowls should not be less than dn110mm.

Common Specifications and Scenario Adaptation

1. Basic Specifications: The standard specification for the toilet bowl's drainage outlet (main pipe) is dn110mm, while the sink's drainage outlet is dn50mm. If directly connected to a septic tank for drainage, a 250mm pipe opening is required for the toilet bowl's drainage outlet and a 160mm opening for the sink's, ensuring direct discharge of waste into the tank.
2. High-Frequency Usage Scenarios: For multi-unit or high-traffic locations (such as shopping malls and train stations), sewer pipes with diameters ranging from dn110mm to dn150mm should be selected to handle large-volume drainage needs and reduce the risk of blockages.
3. Special Drainage Methods: Waterless packing or foam-sealing portable toilets do not require large-diameter sewer pipes because they treat waste through packing or foam sealing, resulting in smaller pipes or even no sewer pipes at all.

Design and Construction Specifications

1. Slope Requirements: Horizontal sewer pipes should have a slope of 1% to 2% (a drop of 1 to 2 cm per meter) to facilitate drainage by gravity and prevent waste retention.
2. Pipe Material Selection: PVC-U pipes are preferred due to their corrosion resistance, light weight, ease of installation, and low cost. The joints must be sealed with glue or sealant to prevent water leakage and odor return.
3. Maintenance Cycle: It is recommended to flush pipe-type public toilets with high-pressure water every 20 days in winter and every 60 days in summer to prevent scale buildup or blockages on the inner walls of the pipes.

Innovative Product Features

Some high-end portable toilets (such as those from the Jiahe brand in Baotou construction sites) adopt a vacuum drainage system that quickly discharges waste through negative pressure differentials, requiring only 0.5 to 1 liter of water per flush, resulting in significant water savings. This system efficiently removes waste, reduces odors and bacterial growth, and is not restricted by terrain, allowing for flexible positioning. Additionally, the system is equipped with a large-capacity sewage tank, liquid level sensors, and remote monitoring to reduce the frequency of emptying and enable precise maintenance.

Customization Options

Manufacturers such as Hangzhou Jiagu Sanitation Facilities Co., Ltd. offer waterless mobile portable toilets with customizable sewer pipe specifications, allowing the selection of appropriate pipe diameters based on the actual needs of construction sites, balancing functionality and cost-effectiveness.