To properly protect your backflow, you want to wrap it in insulation and tape it tightly so that it remains in place. Make sure you cover any exposed coper piping during this process. If you do not have any insulation on hand and it is an emergency, you can use an old sweater, towel or blanket as well.

Do I need to cover backflow preventer?

Backflow cages have no insulation to provide frost or freeze protection but do provide some vandal, accident and theft protection as they are powder-coated steel and include a locking mechanism. But your backflow preventer will be safest under a backflow cover.

How do I protect my backflow preventer?

4- Insulate your Backflow - At almost all home improvements stores, they carry pipe insulation. All you need is that and duct tape and you can wrap the pipe as shown in the picture above. You'll also want heavy duty scissors to cut the insulation around the bleeder and shut-off valves for easy acccess.