Freeze Bag - Standard (Closed Top & Sides)

Installation is simple and requires no tools. Slide the freeze bag over your backflow preventer assembly and secure it using the integrated straps or fasteners. Make sure the bag fully covers the assembly, including test cocks and valves. Install before the first freeze warning of the season for best protection.

To clean the bag, use mild soap and water. Do not machine wash it. Store it in a cool, dry place in the off-season and inspect it before each winter.

Measure the overall length and width of your backflow preventer assembly, including all valves and test cocks. Choose a bag size that provides 2-3 inches of clearance on all sides. For devices 3" or larger, send us your device details so we can make sure you get the right size. If you're unsure, send us a message and we'll help you find the right fit.

Yes! Our backflow freeze bags are built with professional-grade materials designed to last multiple seasons. Simply remove the bag after winter, store it in a cool dry place, and inspect it before the next season. With proper care, our freeze bags provide years of reliable freeze protection.

Yes, we offer volume discounts for water districts, plumbing companies, and backflow testing firms. As an authorized Sub Zero Covers dealer buying direct, we can offer competitive bulk pricing. Contact us to talk through your needs.

Our backflow freeze bags are manufactured by Sub Zero Covers and made in the USA. The Backflow Depot is an authorized Sub Zero Covers dealer. We help you size each bag to your assembly and ship from our Rocklin, California warehouse, and we've been supplying professional-grade backflow protection for many years.