ASSE (Plumbing) 1056-2013 (R2021)

ASSE (Plumbing) 1056-2013 (R2021)

Performance Requirements for Spill Resistant Vacuum Breaker Assemblies

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Details

Spill resistant vacuum breaker assemblies are installed in the water supply lines to prevent the backflow of non-potable material into the potable water supply caused by backsiphonage only. They are not for use in any system where backpressure is applied to the assembly. When the system is pressurized, the air inlet valve closes to prevent a flow through the check valve and to eliminate vent spillage.

The assembly shall:

Not be subjected to backpressure, and
Be installed with its critical level (CL) not less than 12 inches (305 mm) above the flood level rim of the fixture or appliances served. In the absence of a critical level (CL) mark on an assembly, the extreme bottom of the body casting shall be considered the critical level of the assembly for testing and installation purposes.

Additional Info

Author American Society of Sanitary Engineering
Published by ASSE
Document type Standard
Confirmation date 2021-01-01
Number of pages 24
Replace ASSE (Plumbing) 1056-2001
Keyword ASSE (Plumbing) 1056-2013