The green environmental protection three model irregular copolymenr(PP-R) pipes and fittings for hot cold water supply adopt the latest nano reinforced technology. It is made for three-model irregular copolymer polypropylene.The specification is between 20-160,there are so good assortment of products that can completely meet customers demands.And we have gone through about 5000 heat recycle testings and 8760 hours of heat stable testing firstly in our country.