Green PPR pipes are usually labeled as hot water pipes. Their wall thickness and pressure resistance differ from white PPR cold water pipes, and careful differentiation is necessary during installation. Hot water pipes have a pressure resistance of 20 kg, while cold water pipes have a pressure resistance of 16 kg.
PPR pipes must be cut using specialized pipe cutters, ensuring the end face is perpendicular to the pipe axis. It is recommended to cut off 4-5 cm from the pipe ends before installation to remove any potentially damaged parts.
Hot fusion connections should be made using a specialized hot fusion machine, with the temperature controlled between 260℃ and 280℃. During operation, wait for the hot fusion machine indicator light to illuminate green for the second time before proceeding with the hot fusion. After hot fusion, quickly and evenly insert the pipe into the fitting in a straight line to the specified depth without rotation, forming a uniform flange, and carefully control any rebound.
Pipe routing should be horizontal and vertical. When fixing, the recommended spacing between pipe clamps is 50±5 cm for cold water pipes and 35±5 cm for hot water pipes to prevent noise caused by pipe vibration. When multiple water pipes are laid in parallel, the spacing should be maintained at 10±15 cm to avoid condensation and mold growth on the walls due to insufficient spacing.
A pressure test must be performed after pipe installation. The test pressure is generally 1.5 times the working pressure (approximately 8-10 kg), and the pressure holding time is 30 minutes. A pressure drop of no more than 0.5 kg is considered normal.
PPR water pipes are recommended to be installed overhead for easier future maintenance. Underground installation makes leaks harder to detect and repair.
When using PPR fittings with metal threads, sufficient PTFE tape must be used for sealing, and over-tightening should be avoided to prevent cracking of the fittings and subsequent leaks.
Exposed PPR pipes should be protected with UV-resistant foam tubing to prevent direct sunlight from damaging the pipe's molecular structure and shortening its lifespan.
