Water Supply and Drainage in Container Houses

The layout of water supply and drainage in container houses requires scientific design and reasonable installation of both the water supply and drainage systems. The specific key points are as follows:

Water Supply System (Water Inlet)

1. Main Pipeline Introduction: The water source (municipal tap water or water pump) is connected to the bottom floor of the container through the main water supply pipe. A main valve, water meter (optional), and filtration equipment should be installed at the entrance to ensure water quality safety and facilitate water flow control.
2. Vertical and Horizontal Pipeline Layout: The vertical main pipe is made of PPR or PE pipes and is laid along the corner columns or dedicated pipe shafts to the second floor. The horizontal branch pipes are hidden in the ceiling interlayer or floor joists and are connected to various water points (such as kitchens, bathrooms, balconies, etc.) in a 'branch-like' or 'ring-like' layout.
3. Water Pressure Regulation: If there is a significant difference in water pressure between the two floors (e.g., insufficient municipal water pressure), a pressure reducing valve should be installed at the starting point of the second-floor branch pipe, or a booster pump should be added on the ground floor to ensure sufficient water pressure on the second floor.
4. Insulation Measures: Pipes exposed outdoors or in non-heated areas (such as roof water tank connection pipes) should be wrapped with rubber-plastic insulation cotton to prevent freezing and cracking (especially in extreme weather or high-altitude areas) and reduce condensation.

Drainage System (Sewage and Wastewater)

1. Same-Floor Drainage as the Main Method: The drainage branch pipes of sanitary fixtures (toilets, floor drains, etc.) on the ground floor are collected in the floor and directed to the main horizontal pipe, which is then discharged into an outdoor septic tank or municipal sewer network through a slope (≥2%). For second-floor drainage, an 'inter-floor drainage' method is adopted, where the branch pipes are collected under the floor of the current floor and then discharged through the ceiling space of the ground floor.
2. Pipeline Material and Slope: PVC-U pipes are preferred for drainage pipes due to their tight connections and corrosion resistance. Slope design is crucial for smooth drainage and must strictly adhere to standards.
3. Ventilation and Odor Prevention: A ventilation cap should be installed at the top of the main drainage riser to balance air pressure and prevent water seal breakage. Each drainage fixture (floor drain, sink, etc.) must be equipped with a P-type or S-type trap below to isolate odors and pests using the water seal.
4. Special Wastewater Treatment: If the container house involves special wastewater from laboratories, medical facilities, etc., professional treatment equipment or chemicals should be configured to ensure compliance with discharge standards.

Other Drainage Solutions

Drainage holes or troughs can be set on the floor of the container house to discharge domestic sewage and rainwater into an external sewage pool or municipal sewer network. When washrooms and bathrooms are installed inside, sewage can be discharged into an external sewage pool through a sewage tank or direct pipelines.

Summary: The water supply and drainage system in container houses requires comprehensive design from multiple aspects, including pipeline layout, material selection, water pressure regulation, and odor prevention, to ensure safety, efficiency, and compliance with environmental protection requirements.