... :20mm to 32mm5, sanitary,healthy,non-toxic,rustproof and no scale6, recyclable,benefit to the environment7, good resistance ... wall surface,reducing the pressure loss and increasing the flow speed12, low noise,reduced by 40% compared to galvanized steel pipe fitting13, esay and ... 20 degreeProducts specifications and details :1, Spec:D20,D25,D322, ISO9001:2000 quality system certification 4.Competitive ...