How to Do Plumbing and Electrical Work in Prefabricated Houses
The plumbing and electrical pre-embedding in prefabricated houses is usually completed by the manufacturer in advance. Users do not need to use an electric hammer to drill holes themselves, and can proceed with subsequent installations directly after house delivery. If it involves self-built houses or cast-in-place floors, pre-embedding should be carried out on-site according to specifications.
Plumbing and Electrical Pre-embedding Process in Prefabricated Houses
The plumbing and electrical pre-embedding in prefabricated houses (such as cement prefabricated houses) is typically completed during the factory production stage. The manufacturer will pre-embed water and electricity lines, pipes, etc., to specified positions before the house structure is poured, based on user requirements. For example, electrical pre-embedding may include the fixation of wire conduits and switch/socket bottom boxes, while plumbing pre-embedding involves the positioning and installation of water supply and drainage pipes. This process is achieved through standardized molds and processes, ensuring accurate pre-embedding positions, firm fixation, and avoiding damage to the house structure from later drilling. After house delivery, users only need to connect external water and electricity interfaces (such as water meters and electricity meters) and install terminal devices (such as lights and faucets) to use the house.
Requirements for Plumbing and Electrical Pre-embedding in Self-built Houses or Cast-in-place Floors
If it is a self-built house or requires on-site pouring of floors, the following key requirements should be followed for plumbing and electrical pre-embedding:
- Accurate Point Positioning: Determine the positions of terminal devices such as switches, sockets, lights, and faucets according to the design drawings, and mark them on the formwork with ink lines or marking pens. The positioning deviation should be controlled within ±5mm to avoid difficulties in later installation or affecting the user experience.
- Firm Pre-embedding Installation: Wire conduits should be fixed with special pipe clamps, with a spacing of no more than 1 meter; water supply pipes should be fixed with metal brackets or plastic clips to prevent displacement during concrete pouring. Pre-embedded parts (such as bottom boxes and pipe fittings) should be firmly tied to the steel reinforcement mesh to ensure synchronous forming with the floor structure.
- Qualified Interface Treatment: Wire conduit interfaces should be sealed with special glue or lock nuts to prevent concrete infiltration; water supply pipe interfaces should be wrapped with Teflon tape or sealing rings to avoid leakage. Drainage pipes should have a reserved slope (usually 2%-5%) to ensure smooth drainage.
Precautions
Whether it is a prefabricated house or on-site pre-embedding, it is necessary to fully communicate needs with designers and construction parties before water and electricity construction to avoid later changes. After pre-embedding is completed, water and electricity tests should be conducted to check whether the lines are unobstructed and whether the pipes are leaking, ensuring the quality of concealed works is qualified.
