Best steady ppr pipe and fitting of concealed valve for export Green, gray,blue Standard:DIN 8077/8078 ISO9001: ... 2008 Best steady ppr pipe and fitting of concealed valve for export1, raw material: ppr and brass2, pressure rating: ... environment7, good resistance to shock and impact8, resistance to all kinds of chemical liquid9, high temperature reisitance ,the maximum water temperature up ...