... 8078 ISO9001:2008 Best steady ppr pipe and fitting of concealed valve for export1, raw material: ppr and brass2, pressure ... shock and impact8, resistance to all kinds of chemical liquid9, high temperature reisitance ,the maximum water temperature up to 95 degree10 ... welding connection11, smooth inner wall surface,reducing the pressure loss and increasing the flow speed12, low noise,reduced by 40% ...