ASSE Standard #1020-2020(R2025)
Performance Requirements for Pressure Vacuum Breaker Assemblies
ANSI Approved: February 2020
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.
A downloadable version of this standard is also available.