Bishop, also the owner of D&M Mfg. Inc., set out to design effective backflow security systems that would be cost effective. "The cages and valve covers currently on the market were expensive, high ...

The first two preventers cost the company $8,000 each to replace, with the last device $13,000 for replacing the stolen preventer and security cage and repairing damage to the concrete pad, which ...

Security tips Paint, coat label, or stamp backflow preventers. Cover backflow devices with either a protective cage or enclosure, which are secured or mounted to the ground. Use a high-quality ...