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About This Item


Full Description

ASSE 1020 devices are installed in water supply lines to prevent the entrance of non-potable material into the potable water supply by backsiphonage (only) and are intended for use in both high and low hazard applications. This standard was first published in 1974 to extend ASSE's portfolio of standards for backpressure and backsiphonage backflow prevention devices for pipe applied vacuum breakers.

Document History

  1. ASSE (Plumbing) 1020-2020


    Performance Requirements for Pressure Vacuum Breaker Assemblies

    • Most Recent
  2. ASSE (Plumbing) 1020-2004

    Performance Requirements for Pressure Vacuum Breaker Assembly

    • Historical Version