This American made backflow enclosure features a lift-off design for maximum accessibility. It is recommended to add the Chromalox Heat Cable #30 with 90W of heat to protect from freezing temperatures. This enclosure is made from marine grade aluminum, polyisocyanurate foam insulation board, and a glass fiber reinforced facer on each side. The 200S-AL enclosure is easy to set up, safe for testers, and helps offer protection from vandalism.