WATTS® 757 Double Check Detector Assembly With OSY Gate Valve, 2-1/2 in, Stainless Steel

999771 MFG #: 0111544
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WATTS® Double Check Detector Assembly, 757 Series, 2-1/2 in Nominal Size, 175 psi, 33 to 44 deg F, Stainless Steel Body, 30-3/4 in L

Series 757DCDA, 757NDCDA Double Check DetectorAssemblies are used to prevent backflow of non-health hazard pollutants that are objectionable but not toxic, from entering the potable water supply system. The 757DCDA, 757NDCDA may be installed under continuous pressure service and may be subjected to backpressure and backsiphonage. Series 757DCDA, 757NDCDA is used primarily on fire line sprinkler systems when it is necessary to monitor unauthorized use of water.

  • Features
  • Extremely compact design
  • 70% lighter than traditional designs
  • 304 (schedule 40) stainless steel housing and sleeve
  • Groove fittings allow integral pipeline adjustment
  • Patented tri-link spring check provides lowest pressure loss
  • Unmatched ease of serviceability
  • May be used for horizontal, vertical or N pattern installations
  • Replaceable check disc rubber
  • 304 stainless steel housing and sleeve
  • Reversible silicone or EPDM check discs
  • Bronze body nickel plated test cocks
  • OSY: UL/FM outside stem and yoke resilient seated gate valves
  • Standard/Approvals: ASSE 1015, CSA B64.5, FM Approved, cULUS Classified
  • WARRANTY: Limited