... 2.Cu%:56%-60% 3.Thread standard:ISO,DIN,GB,JIS 4.Thread specification:G,R,NPT,NSP Ppr valveFeature:1. Material: Brass ... (CuZn39Pb3/CuZn39Pb2, CW614N/CW617N) PPR is from Chinese Yanshan Petrochimical2. Thread standard: GB, BS, JIS, ISO3. Thread type: G, R, NPT, BSP ... heating equipment.7. Piping system for other industries and agriculture. High quality female thread PPR valve