Excellent water hammer resistance. The Olive Blue Pipe PVC-O has a thinner wall and a larger inner diameter, so the Olive Blue Pipe has a lower celerity (up to four times less, the case of ductile iron pipes) than piping systems made of other materials. When the volume and pressure of the water delivered suddenly change, the resulting water hammer is lower. Therefore, when the valve and the pump are opened or closed, the occurrence probability of a pipe explosion accident is reduced or even eliminated, which means the operation of the pipe network is much safer.