Product/Service

909 Series Reduced Pressure Zone Backflow Pre-venters

The Watts 909 Series Reduced Pressure Zone Backflow Pre-venters are designed to provide cross-connection control pro-tection of the potable water supply in accordance with national plumbing codes.
The Watts 909 Series Reduced Pressure Zone Backflow Pre-venters are designed to provide cross-connection control pro-tection of the potable water supply in accordance with national plumbing codes. This series can be utilized in a variety of instal-lations, including high hazard cross-connections in plumbing systems or for containment at the service line entrance. With its exclusive patented relief valve design incorporating the "air-in/ water-out" principle, it provides substantially improved relief valve discharge performance during the emergency conditions of combined back siphonage and back pressure with both checks fouled.

FEATURES

  • Replaceable bronze seats
  • Stainless steel internal parts
  • No special tools required for servicing
  • Captured spring check assemblies
  • Fused epoxy coated & lined checks
  • Industrial strength sensing hose
  • Field reversible relief valve

    AVAILABLE MODELS
    Suffix:
    BB - with bronze body (2 1 Ú2", 3")(64, 76mm)
    LF - without shutoffs
    NRS - with non-rising stem resilient wedge gate valves
    OS&Y - with UL/FM resilient seated outside stem and
    QT - with quarter-turn, full port, resilient seated
    QT-FDA - with FDA approved epoxy coated ball valve shutoffs
    S - with non-epoxy strainer
    S-FDA - with FDA approved epoxy coated strainer

    SPECIFICATIONS
    For Reduced Pressure Zone Backflow Preventers A reduced pressure zone backflow preventer shall be installed at each cross-connection to prevent backsiphonage and backpres-sure backflow of hazardous materials into the potable water supply. The assembly shall consist of a pressure differential re-lief valve located in a zone between two positive seating check valves and captured springs. Backsiphonage protection shall in-clude provision to admit air directly into the reduced pressure zone via a separate channel from the water discharge channel. The assembly shall include two tightly closing shutoff valves be-fore and after the valve and test cocks. The assembly shall meet the requirements of ASSE Std.

    Watts Regulator Company, 815 Chestnut St., N. Andover, MA 01845. Tel: 978-688-1811; Fax: 978-689-6247.