Water Plumbing 1>Material:Yanshang PPR(Beijing) 2>Size:20,25,32,40,50,63,75,90,110mm 3>Cert.: ... service Water Plumbing 1>Material:Yanshang PPR(Beijing)2>Size:20,25,32,40,50,63,75,90,110mm3>Cert.:ISO9001 ... reach at least 50 years under normal use ppr water pipe