... ,50,63 2.material:Yanshang PPR,brass 3.OEM Stop Valve:1.size:20,25,32,40,50,632.material:Yanshang ... protective building materials. It can be used in the piping system of pure water and drinking waterAnticorrosion, anti-encumbrance: using the ... can reach at least 50 years under normal use. Stop Valve for PPR pipe