Hot Box® is designed to enhance the installation of backflow prevention, pump, and sprinkler assemblies, pressure vacuum breakers, air release valves, etc. in the most economical, accessible location – outside, above ground. More and more designers, utilities, and contractors are putting the Backflow Preventer “at the curb” to eliminate the problems encountered in equipment rooms (no costly floor space, drainage constraints..) and pits (OSHA 29 CFR, parts 1910 flooding, accessibility). Enclosures are designed and manufactured out of aluminum, fiberglass, and polyethylene, and are generally insulated with polyisocyanurate foam and are often heated. Engineered features such as heater sizing (freeze protection), drain sizing, service access, and rigid construction make the Hot Box® the permanent solutions to the problem of protecting your outdoor piping systems.