... /cold water supply.b.a long life service up to 50 yearsc .no scaling compared to metal pipe ,ppr pipe not ... diameter pipe linertypesspecificatonppr equal diameter pipe liner20 25 32 40 50 63 75 90 110 reducer25x20 32x20,x25 40x20,25,32 ... 50x20,25,32,40 63x20,25,32,40,50 75x32,x40,x50,x63 90x32,40,x50,x63,x75 110x50 ...