How to Install Water and Electricity in Container Houses

The installation of water and electricity in container houses requires a combination of professional design and standardized construction processes, covering key aspects such as point planning, slot cutting and pipe laying, pipe installation, waterproofing treatment, and acceptance inspection.

I. Preliminary Planning and Design

1. Positioning of Water and Electricity Points
   Based on the functional requirements of the container house (such as living or office use), mark the positions of switches, sockets, lighting fixtures, and water supply and drainage outlets according to the design drawings. Avoid load-bearing structures and strictly prohibit horizontal slot cutting that may damage the wall's load-bearing capacity. For example, 3D modeling technology is often used in container house renovations to optimize wiring layouts and ensure construction accuracy.

2. Pipe Pre-embedding Design
   The electrical circuit should distinguish between strong current (lighting, sockets) and weak current (network, television) to avoid running them through the same conduit. For the water supply system, plan the spacing between hot and cold water pipes (usually ≥15cm) and reserve drainage slopes. Some container houses integrate rainwater collection systems, requiring advance design of storage tanks and filtration pipelines.

II. Slot Cutting and Pipe Laying

1. Wall/Floor Slot Cutting
   Use a cutting machine to cut slots along the planned routes, ensuring consistent depth (usually 1.5 times the diameter of the conduit). Container walls are often made of metal or composite panels, requiring specialized tools (such as impact drills) for slot cutting to avoid damaging the structure.

2. Conduit Laying

   • Electrical Circuit: Use PVC flame-retardant conduits, with strong and weak currents laid in separate conduits. Shield the intersection with aluminum foil. The cross-sectional area of the wires inside the conduit should not exceed 40% of the conduit's diameter, and joints should be left in junction boxes.
   • Water Supply System: Recommend PPR hot-melt connections for water supply pipes and PVC adhesive connections for drainage pipes to ensure no leakage. Hot and cold water pipes should be wrapped with insulation sleeves to prevent condensation.

III. Pipe Installation and Testing

1. Water Supply System
   After laying, conduct a pressure test (pressure ≥0.8MPa, hold for 30 minutes without leakage) to ensure tightness.

2. Drainage System
   Check the slope of the drainage pipes (usually ≥2%) and verify smooth drainage through a water flow test. Some container houses design independent sewage collection systems, requiring the installation of lift pumps.

IV. Waterproofing and Closure

1. Waterproofing Treatment
   Apply waterproof coating in areas such as bathrooms and kitchens (height ≥1.8m), reinforcing wall corners and joints with fiberglass mesh. After curing, conduct a 24-hour closed water test to confirm no leakage to the floor below.

2. Pipe Closure
   After the water and electricity pipes pass the acceptance inspection, seal the slots with cement or expanding foam and take photos to retain the pipe layout drawings to avoid accidental damage during later drilling.

V. Acceptance Inspection and Maintenance

1. Hidden Project Acceptance Inspection
   Check whether the pipe specifications and wiring layout comply with the design drawings and record video materials for archiving through a digital system.

2. Long-term Maintenance
   Regularly check whether the water supply and drainage interfaces are loose and whether the electrical circuit's insulation performance meets standards. Due to the conductive nature of the metal structure in container houses, ensure the grounding system is reliable.