Engineered heated enclosures Safe-T-Cover has manufactured in Nashville Tennessee superior vandal and freeze protective enclosures for backflow preventers, pumps, control valves, meters and equipment for 20 years.  The Safe-T-Cover line of enclosures manufactured by Hydrocowl, Inc. has over 50 standard size insulated, aluminum enclosures. All of our standard backflow prevention assembly enclosures are ASSE 1060 approved. Each enclosure was built with a specific backflow prevention assembly type in mind from all leading backflow manufacturers such as Wilkins (Zurn).