The 420XL series PVB’s are used to protect potable water lines against cross-contamination caused by backsiphonage. They feature a built-in freeze relief valve for occasional, non-seasonal freeze protection, and are designed for use under continuous pressure.
3/4" and 1" sizes available in lead-free bronze.
About Wilkins 420XL series
420XL model pressure vacuum breaker offers protection against backsihponage in applications where a potential health hazard exists. These units have an integral anti-freeze valve and a replaceable modular cartridge for easier maintenance and repair. Comes complete with full port ball valves and test cocks.
Max working pressure: 175 psi
Temperature range: 33-140°F
Hydrostatic test pressure: 350 psi
Threaded connections comply with ANSI B1.20.1
This product does not meet the new low-lead criteria defined in Safe Drinking Water Act
and cannot be used for potable water applications,
including for drinking and cooking. This product can be used for non-potable water
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