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.
- Compact size and shape allow for ease of installation
- Ideal for regions where occasional or unexpected freezes occur, yet winterization (flushout) is not common
- Hassle free design requires no periodic maintenance, and can be used with all major brands of backflow preventer
|Connection Size||1/4 in.|
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