How to Install Plumbing in Prefabricated Houses

The embedding of plumbing in prefabricated houses requires strict control over key aspects such as construction sequence, pipe material selection, and slope setting. The specific points are as follows:

1. Construction Sequence and Foundation Treatment

After backfilling the foundation, it should be repeatedly compacted to ensure soil density. Then, trenches should be specifically dug for laying drainage pipes to prevent pipe crushing or deformation due to soil settlement. For light steel villas, it is necessary to plan the reserved positions for plumbing in advance during the foundation construction stage (such as when digging trenches for lime soil and placing red bricks at corners) to ensure that the pipes are installed simultaneously with the foundation structure.

2. Pipe Material Selection and Performance Requirements

Preferably use PPR hot water pipes, whose compressive strength, flexibility, and anti-aging properties are dozens of times those of PVC pipes, and coated pipes are more durable. Avoid using PVC pipes as they are prone to cracking and leaking, especially under low temperatures or external forces. If PVC pipes must be used, manual backfilling protection should be adopted during backfilling to prevent damage from mechanical compaction.

3. Slope and Drainage Efficiency

The pipe slope should comply with industry standards: an increase of 2.5 centimeters per meter (or a decrease of 2-3 centimeters per meter, with a unified direction) to ensure the natural flow of sewage and prevent odor accumulation or bacterial growth. Insufficient slope can lead to poor drainage, which may cause pipe blockages or odors over time.

4. Pipe Bends and Fluid Mechanics

Avoid using right-angle bends or S-bends. Instead, use 45-degree large-radius elbows or 135-degree angled elbows to reduce water flow resistance and prevent debris retention. Improperly designed bends are a common cause of blockages and should be constructed strictly according to specifications.

5. Embedded Holes and Structural Safety

During the main construction, detailed location diagrams should be drawn. Key structures such as load-bearing walls and beams must have reserved holes and be reinforced to prevent damage to the house's stability from cutting steel bars during later drilling. Pipes should avoid being embedded in structural columns to prevent affecting the structural load-bearing capacity.

6. Pipe Opening Protection and Cleaning Maintenance

Use special blind plugs to seal unconnected pipe openings to prevent dust and wood chips from entering the pipes during construction and avoid blockages caused by debris after moving in. For septic tanks, it is recommended to choose three-section or fiberglass models and reserve an exhaust hole before the first compartment to balance air pressure and reduce odors.

7. Other Detail Optimizations

• Separate the pipes for bathrooms and kitchens to prevent bathroom odors from entering the kitchen.
• Choose odor-proof floor drains to reduce blockage risks; install trap bends to isolate sewer air.
• Determine the drainage method for sinks (floor drainage or wall drainage) in advance to avoid damaging the decoration during later modifications.
• During backfilling, the area where pipes are located should be manually filled lightly to avoid mechanical damage to the pipes.