This American made backflow enclosure features a two door design. It is recommended to add the HCHS1000-120 Heater with 1000W of heat to protect from freezing temperatures. This enclosure is made from marine grade aluminum, and polyisocyanurate insulation. The 400D-AL enclosure is easy to set up, lockable, and provides protection against vandalism to backflow preventers, meters, and other pumps and valves.

This enclosure meets ASSE Standard 1060 Class 1 for free protection when the recommended heater is added.