1,High quality HDPE material. 2,Easy bending and connection in heating system. 3,Working temprature:-45degree to 95degree. 1,High quality HDPE material.2,Easy bending and connection in heating system.3,Working temprature:-45degree to 95degree. We are zhejiang DunYun valve co.,ltd,specializing in manufacturing in all kinds of brass ball valve(over 100 kind of types),brass fitting for pex-al-pex ...