20*1/2"Female PPR Elbow Application: for drink water using. Size: L20*1/2F,L20*3/4F, L25*1/2F,L40*1F etc. white , ... , coupling , straight-through , Pipes.Application: 1.For pure drink water system2.Cold water and hot water system in construction bulidings.3.Heating system ... time >=70, cold choose C=1.52. Code water conditon : <=40, could choose P.N 1--1.6Mpa Hot water condition : could choose more ...