Backflow freeze bags are specialized protective enclosures designed to safeguard backflow prevention assemblies, commonly used in plumbing systems. These assemblies prevent the reverse flow of water, ensuring that clean water doesn't mix with contaminated water. Backflow freeze bags act as protective covers, shielding these crucial components from external elements, damage, and inclement weather, maintaining their effectiveness and longevity.
Backflow Freeze Protection Bags
An insulated backflow bag wraps an above-grade assembly — a PVB, RP, or hose-bib vacuum breaker — to slow heat loss through winter. Sizes here run from a 7 in hose-bib pouch up to 24x24 and 34x24 bags in green or tan that cover a full PVB or RP body, from WinterWrap and DEK.
A bag lowers freeze risk but does not replace draining the assembly in a hard freeze — the exposed brass body and test cocks crack first. See the backflow buying guide to identify your PVB or RP assembly.
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