The inside and outside wall are smooth, the coefficient of friction is small, roughness is only 0.008 to 0.009, anti-fouling property is strong, fluid transport efficiency is enhanced 25% than cast iron piping network.

PVC-U material has strong resistance to most of acid and alkali. No rust, no antiseptic treatment. The service life is 4 times than that of cast iron.

Weight is very light. The density of PVC-U is only 1/5 to 1/6 of that of cast iron. The method of connection is very simple, and the process of installation is very quickly.

PVC pressure pipes for water are light in weight and relatively low in sales cost. They have a bell shaped cover with a sealed environment, which can be tightly connected without using additional seals. No welding machine or complicated tools are required for installation. Because of its simplicity, installation can be done manually.