Wilkins Freeze Protection Valve 1/4 in.
Designed to prevent freeze damage to backflow preventers installed above ground in geographical regions subject to occasional freezing. The model ZWFR senses water temperature and opens at 35 F to discharge near freezing water from the backflow device and draw warmer supply water through the valve. The model ZWFR closes when water temperature reaches 40 F.
Hassle free design requires no periodic maintenance, and can be used with all major brands of backflow preventer
Ideal for regions where occasional or unexpected freezes occur, yet winterization (flushout) is not common
Compact size and shape allow for ease of installation