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Wilkins 3/4" Pressure Vacuum Breaker Assembly Model 420
APPLICATION
Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Supplied with an integral anti-freeze relief valve to reduce the risk of valve damage under intermittent, non-seasonal freezing conditions.
Designed for use under continuous pressure. Assembly shall provide protection where a potential health hazard exists.
Specifications
Installation & Maintenance Instructions
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