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With Winter comes freezing temperatures that can cause your pipes or your backflow preventer to crack and leak. This can cause hundreds or thousands of dollars. However, the problem can be solved by simply cover insulation pouch over your exterior backflow valve system. NEBYWOLD provide different size insulated protective covers to meet your demand. Feature 1 big backflow cover and 2 antifreezing thermal covers for outdoor faucets · 16"W x 20"H - Bigger enough for your backflow system or other long faucet system in your yard. The extra room make sure that you can also wrap your pipes with other tape before cover this backflow insulation bags if you like. · 600 Oxford Fabric - Durable and waterproof · EVA - Insulation, industrial grade insulation rubber foam · Grommet - Made of brass, not easy to rust, wear-resistant and corrosion-resistant Function · Protect from severe weather conditions - Handy in some climate where freezing can affect your backflow controller, which may cause the backflow preventers freezing, bursting and blowout. · Avoid high repair costs every year - Compared to paying high fee every year for valve replacing or repairing, this backflow preventer cover pouch help to save your mone. Package includes: 1 x Blue Backflow Preventer Insulation Cover 2 x Black faucet sock At NEBYWOLD , we back them all with an 18-month promise and provide friendly ,easy-to-reach support,and Free Lifetime Technical Support also