Why fire water pipes do not use PVC plastic pipes?
The PVC pipe interface is glued and the security level is inadequate. Fire pipe network relates to the whole building personnel life safety, normal perennial guarantee water and pressure, can not casually water supply and maintenance.
The steel pipe interface is threaded, and the safety level is high.
Because of the lower level of safety guarantee, the water for domestic use can be maintained without water at any time. Therefore, fire pipe network requires steel pipe instead of PVC pipe.
