What common issues should be considered regarding the purchase, installation, and maintenance of PVC pipes?

Updated on

2026-10-08 16:25:50.637

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Purchasing:

- How to assess quality? Check the appearance (smooth surface, no air bubbles); check the weight (too light suggests substandard additives; too heavy suggests excessive calcium carbonate, making it brittle); check certifications (look for manufacturing credentials and standard compliance codes).
- What specifications for home renovation? Common drainage pipe sizes are 110mm (main lines) and 50mm (branch lines); common conduit sizes are 16mm and 20mm (selected based on the number of wires).
Installation:

- Standard steps: Clean joints → dry fit → apply adhesive (apply to the inside of the fitting first, then the outside of the pipe; insert with a twisting motion) → pressure/water flow test (confirm no leaks before sealing/enclosing the installation).
- Do not directly connect pipes of different materials; use appropriate adapters to ensure a proper seal.
- For summer installations or long exposed runs, allow for expansion gaps to prevent deformation caused by thermal expansion and contraction.
Maintenance:

- Clearing blockages: Use a drain snake for minor clogs; for severe clogs, disassemble the joint to clean it out; avoid using highly corrosive drain cleaners.
- Repairing cracks: Use specialized PVC repair adhesive for small cracks; for large cracks or breaks, it is recommended to replace the section with a new pipe of the same specification.
- Storage precautions: Avoid prolonged exposure to direct sunlight and keep away from high heat or fire sources; do not stack pipes too high to prevent deformation from pressure.
Choosing between PVC and PPR pipes: PVC pipes are suitable for drainage, electrical conduits, and large-diameter municipal projects, and they are more cost-effective; PPR pipes are suitable for residential hot and cold water supply systems. Each has different applications; choose based on your specific needs.