Product/Service

Series 709 Double Check Valve Backflow Preventer

Series 709 Double Check Valve Backflow Preventer is designed to preventthe reverse flow of polluted water from entering into the potable water system.
Series 709 Double Check Valve Backflow Preventer is designed to preventthe reverse flow of polluted water from entering into the potable water system. This series can be applied, where approved by the local authority having jurisdiction, on non health hazard installations. Series 709 features a modular check design concept to facilitate easy maintenance. Check with local jurisdictional authority as to installation requirements.

FEATURES

  • Replaceable bronze seats
  • Maximum flow at low pressure drop
  • Design simplicity for easy maintenance
  • No Special Tools Required for Servicing
  • Captured spring assemblies for safety
  • Approved for vertical flow up installation

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

    SPECIFICATIONS
    FOR DOUBLE CHECK VALVE BACKFLOW PREVENTERS
    A double check valve backflow preventer shall be installed at referenced cross-connections to prevent the backflow of polluted water into the potable water supply. The cross-connections shall be determined by local inspection authority for use where a high hazard situation does not exist. Valve shall fea-ture modular check assemblies with center stem guiding. Each check module shall have a captured spring and be accessible through a bolted cover plate. Seats shall be replaceable without special tools. It shall be a complete assem-bly including tight-closing resilient seated shutoff valves, test cocks, and a strainer is recommended. The assembly shall meet the requirements of ASSE

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