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20mm-110mm/1/2"-4" DIN/ASTM Standard OEM Factory Supply Plastic Single & Double Union Ball Valve Socket or Threaded PVC Ball Valve/Union Ball Valve, Find Details and Price about Union Ball Valve PVC Ball Valve from 20mm-110mm/1/2"-4" DIN/ASTM Standard OEM Factory Supply Plastic Single & Double Union Ball Valve Socket or Threaded PVC Ball Valve/Union Ball Valve - Ningbo Salvador Piping System Co., Ltd.