Redford Supply Co. Cold Snap (5°F) Double Wall Cotton Backflow Preventer Insulation Cover - Sprinkler Covers for Outside, Well Head Cover, Insulated Well Pump Cover, Pipe Cover (18"W x 34"H, Green)

It look nice. it fits. Easy to install and remove. I don’t think it will be tested this late in the season, but it gives me peace of mind to have it.

When the temperature drops into the 30's (or below) the last thing you're thinking about is whether the backflow preventer is going to freeze. This cover is awesome -- it fits well and stays put. We didn't need to secure it at the bottom, and it's weathered driving rain and high winds without a problem. A little more expensive than the competitors, but the quality is well worth it. Recommend!

This did exactly what was required. Well made, easy to put on / off and durable.

This seems like a very good product. Very sturdy and will last a long time. However, the dimensions given are the exterior dimensions which is not clearly stated anywhere in the description. I measured my pipe width and it came to 27 inches. When the 28 inch wide insulator came, it was about an inch too short and would not fit. I am going to reorder this item in a larger size. Just a little frustrating that I now have to deal with a return since I do not live close to town so it is a chore to go out to the UPS store for return. But I look forward to returning the small one and getting the new larger size one as it does appear to be a very well constructed item.

Worked like expected.

We have above ground water backflow. Cold weather can cause the pipes to freeze and break. This item fit perfectly. No pipes burst this year!

We use this along with some pipe wrap to keep our outdoor backflow valve protected form the elements. Velcro is very secure, and the three-way opening allows for a lot of flexibility for the wrap. Stays put even in strong winds. A must-have for home protection and to avoid damage and costly repairs.

Bought to go over sprinkler/water connections on my house. The first one, even though I measured was too tight. The company quickly replaced for me and NO charge, even with my new one being larger. Great Customer Service!!! WORKS AMAZING in protecting the connections in cold/freezing weather. I have had several people ask about them -- continue to recommend the product and the company.