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Note: This item does not comply with the 2014 Lead Free Act. It may not be used in potable water applications as of January 4, 2014. For potable water applications 0683010 is recommended.

Series 825Y "Y" Pattern Design Reduced Pressure Zone Assemblies are used to protect against high hazard (toxic) fluids in water services to industrial plants, hospitals, morgues, mortuaries, and chemical plants. They are also used in irrigation systems, boiler feed, water lines and other installations requiring maximum protection. They feature a bronze body and threaded ball valve shutoffs. Maximum Working Pressure: 175psi (12.1 bar).


  • Ultimate mechanical protection of potable water, against hazards of cross-connection contamination.
  • Meets all specifications of AWWA, ASSE, CSA and approved by the Foundation for Cross-connection Control and Hydraulic Research at the University of Southern California.
  • Flow curve generated by the Foundation of Cross-Connection Control and Hydraulic Research at the University of Southern California.
  • Modular relief valve for ease of maintenance.
  • Simple Service procedures. All internal parts serviceable in line.
  • Low head loss.
  • Spring loaded "Y" type check valves.
  • Internal relief valve pressure sensing passages.
  • Replaceable seat rings on all sizes.
  • End connection ? NPT ANSI / ASME B1.20.1


    The reduced pressure zone assembly shall consist of two independently operating, spring loaded, "Y" pattern check valves and one hydraulically dependent differential relief valve. The assembly shall automatically reduce the pressure in the "zone" between the check valves to at least 5psi lower than inlet pressure. Should the differential between the upstream and the zone of the unit drop to 2psi, the differential relief valve shall open and maintain the proper differential. Mainline valve body and caps including relief valve body and cover shall be bronze. Check valve moving member shall be center stem guided. All hydraulic sensing passages shall be internally located within the mainline and relief valve bodies and relief valve cover. Diaphragm to seat area ratio shall be 10:1 minimum. Relief valve shall have a removable seat ring. Check valve and relief valve components shall be constructed so they may be serviced without removing the valve body from the line. All seat discs shall be reversible. Shutoff valves and test cocks shall be full ported ball valves. The assembly shall be rated to 175psi (12.1 bar) working pressure and water temperature range from 32°F to 140°F (0ºC - 60ºC). The assembly shall meet the requirements of ASSE Standard 1013; AWWA Standard Code C511; CSA Standard B64.4; and approved by the Foundation for Cross-Connection Control and Hydraulic Hydraulic Research at the University of Southern California.
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    Weight (lbs):

    29 lbs

    Product Type:

    Backflow Preventer

    Max Pressure (PSI):


    Water Temperature:

    32°F to 140°F

    Hydrostatic Test Pressure:

    350 PSI



    Connection Type:

    Female Threaded

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