Rural Prefabricated House Toilet Design

The following plans can be referred to for the toilet design of rural prefabricated houses, covering zoning, septic tank selection, and key points of design specifications:

Zoning Design

It is recommended to adopt a "four-zone" layout for the bathroom in rural prefabricated houses to enhance space utilization and functional rationality. Place a sink in the outermost zone for daily washing and cleaning items; arrange the toilet and washing machine in the middle zone, sharing a drainage system to reduce pipeline laying costs; the innermost zone is the shower area, achieving dry-wet separation through glass partitions or shower curtains to prevent water vapor from escaping. This layout is suitable for house types with only 1-2 bathrooms per floor, especially those with compact spaces in prefabricated houses, enabling a "one room serving four functions" composite functionality.

Septic Tank Selection

The septic tank is a core component of toilet design and should be selected based on family size, drainage conditions, and cost budget:

• Simple Three-Compartment Septic Tank: Suitable for rural areas without centralized sewers. A finished septic tank can be purchased and connected to the toilet squat position via a sewage pipe, semi-buried in a backyard pit. Its advantages include low cost and fast construction, without the need for manual digging of deep pits or bricklaying. However, its capacity is relatively small (about 1-2 cubic meters), requiring annual fecal water cleaning twice for a family of four. If there is a sewer locally, a traditional cement-built three-compartment septic tank can be used instead, dug to a depth of 2.5 meters and a width of 1.5 meters, with the end directly discharging into the sewer to reduce cleaning frequency.
• Urine-Diverting Toilet: Based on improvements to traditional dry toilets, a 60-80 cm long separation structure is designed at the bottom of the squat position to collect urine and feces separately. Advantages include: high resource utilization of feces and urine (feces for composting, diluted urine for irrigation), no external pollution risk, and lower construction cost than septic tanks. However, regular feces cleaning is required, suitable for families with high environmental protection requirements or limited economic conditions.

Design Specifications

Toilet construction should meet the "six have, three without" standards: having walls, a roof, a door, windows, lighting, and flushing equipment, without fly larvae, odors, or exposed feces. The following modes are recommended for treatment facilities:

• Basalt Fiber Finished Three-Compartment Septic Tank: Corrosion-resistant and long-lasting, suitable for areas with complex geological conditions;
• Brick-Concrete Three-Compartment Septic Tank: Traditional craftsmanship with lower cost but requiring professional construction;
• "Biogas Toilet Conversion" Mode: Combined with biogas digester design to achieve fecal resource utilization;
• Complete Sewer System: If the village has already laid sewers, it can be directly connected to simplify the treatment process.

Precautions: The septic tank should be located away from drinking water sources to avoid pollution; regularly check pipeline connections to prevent leakage; select the septic tank capacity based on the number of family members to avoid frequent cleaning.