This cover is designed to protect backflow devices from both temporary freezing conditions such as cold snaps and overnight freezing and sun exposure. Due to the opening at the bottom of a cover, conductive heat loss can occur. The cover will provide a weather resistant barrier that increases the time before freezing can occur. At 32 degrees (Freezing) with zero water flow, no wind chill, one can expect about 18 hours of protection. At 15 degrees, about 10 hours of protection. Any water flow during freezing conditions will increase your protection time. 

This product is manufactured in California and meets industry standards, is proudly made in the United States of America and crafted with quality materials that will hold up under extreme cold, rain, snow, wind and summer heat.