【Reliable 6-Layer Design】:Insulated well pump cover provides superior insulation and waterproofing,double-layer insulation compartment,aluminium insulation and double-layer insulation cotton to maximise insulation performance,made of reliable waterproof Oxford cloth to protect your pipes from the cold winter! 【Size Pick】:This winter sprinkler return cover measures 24"W x 24"H,measuring the pipe size before buying is an important step,please measure the pipe size accurately and allow at least more than 3 inches(approx.7.6cm) as the pipe has a certain thickness to ensure it can be covered safely. 【Extend Pipe Life & Save Money】:Pipes with backflow insulation cover keep heat in the pipe even in cold climates,preventing energy waste and freezing,reducing the frequency of pipe repair and replacement and saving on costly repairs. 【Multi-Functional Pipe Insulation Cover】:Suitable for backflow prevention sprinkler covers,irrigation system covers,well filter covers and other equipment to provide insulation and protection against temperature loss,avoiding the risk of pipe freezing or overheating. 【Easy and Stable Installation】:Place the backflow covers for outside insulation on the pipe and close it with Velcro to make sure it covers the pipe tightly,thus improving the heat preservation effect,designed anti-theft grommets can also be locked by chain to prevent theft and improve security. Yehchi Backflow Preventer Insulated Cover (5˚F) Thick 6-Layer Fabric Pipe Insulation Cover (UV Coated) for Winter Freeze Protection,Water Well Pump Covers and Sprinkler Valve Covers to Withstand Harsh Weather (24"W X 24"H)