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- Series 800M4FR Freeze Resistant Pressure Vacuum Breakers prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O-ring seal, a lightweight plastic disc float, a built-in relief valve to protect the internal components and the body from freezing, tee handle or lever handle shutoffs, and test cocks for winterization draining. Series 800M4FR is ideal in continuous pressure health hazard applications where exposure to sudden freezing conditions such as on irrigation systems and industrial process water systems can occur. Maximum Pressure: 150 psi (10.3 bar), Minimum Pressure: 15 psi (55 kPa).
WATTS® Pressure Vacuum Breaker, Freeze Resistant, 1 in Nominal, FNPT, 150 psi, 33 to 140 deg F, 7.5 fps, Drain/Blow Down Port, Bronze Body, 7-1/2 in L x 7-1/2 in H, Domestic
- Unique built-in relief valve relieves pressure caused by ice formation
- Replaceable plastic seat
- Easy maintenance of internal parts
- O-ring bonnet seal for less possibility of fouling
- Silicone seat disc for durability
- Test cocks positioned for easy testing and winterization
- Compact space saving design
- No special tools required for servicing
- Bronze body for durability
- Vacuum breakers are not designed, tested or approved to protect against backpressure backflow or water hammer shock
- Body MaterialBronzeDomestic / ImportDomesticEnd StyleFNPTFlow Rate7.5 fpsNominal Size1 inDimensions7-1/2 in L x 7-1/2 in HManufacturerWatts Water TechnologiesManufacturer #0388015Port TypeDrain/Blow DownPressure Rating150 psiTemperature Rating33 to 140 degFTypeFreeze Resistant