Freeze Resistant Pressure Vacuum Breakers - 800M4FR

Series 800M4FR freeze resistant pressure vacuum breakers include a freeze sensor for use with SentryPlus Alert® technology to monitor temperature nearing the freezing point. The sensor is activated with the BMS/IMS Freeze Sensor Connection Kit to relay a signal to building or irrigation management systems, helping facility personnel take actions that reduce or eliminate PVB replacement and repair. Freeze alerts are distributed according to the BMS/IMS application.

This series prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. Ideal for continuous pressure health hazard applications where exposure to sudden freezing conditions can occur in irrigation systems and industrial process water systems. Maximum pressure: 150 psi (10.3 bar), Minimum pressure: 15 psi (55kPa).

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Features
- Bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, and a lightweight plastic disc float
- Sensor on PVB signals when temperature nears the freezing point
- Freeze alerts help extend use of the PVB device by reducing damage and repair
- Freeze alerts feature available with add-on connection kit for irrigation management systems
- Unique built-in relief valve in plastic float protects assembly during sudden freeze conditions by relieving pressure caused by ice
- Compact and designed for easy maintenance
- Test cocks are positioned at lowest point of the valve for easy winterization draining
- O-ring bonnet seal reduces possibility of fouling
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