... .Lifetime:50 years 4.Easy and quick instal HDPE male thread joint 1.As a company listed in Singapore , ATON Innovation ... ducts, PE fuel gas, etc. 2.Detail: Name:HDPE male thread joint SpecificationOutside diameter(mm):20*1/2",25*3/4 ... -up and sediment, smooth internal wall , small flow resistance with 0.009 of friction coefficient, so little water head loss, 30 ...