... PPR-AL-PPR pipe 1.Competitive price 2.Size(mm):20-75 3.Quickly connection,reliable 4.Inner and outter wall is smooth PPR ... -AL-PPR pipe Size(mm): 20,25 32,40,50 ... materials.2. Unlike copper-plastic composite pipe, PP-R pipe can have heavy caliber pipes produced, ... residential cold and hot water system2. Drink pure water system3. Central air-conditioning system and air ...