... Green, gray,blue Standard:DIN 8077/8078 ISO9001:2008 Best steady ppr pipe and fitting of concealed valve for export1, raw material: ppr ... speed12, low noise,reduced by 40% compared to galvanized steel pipe fitting13, esay and fast installation, minimized installation time and cost14 ... do not hesitate to contact us. OEM is also welcomed. Best steady ppr pipe and fitting of concealed valve for export