These devices were commonly called "9D" valves, but the new plumbing code doesn't mention this type of device at all; per section 603.5.10, boilers must be protected by either a testable double check ...
The City Council is taking a look at toughening up enforcement for backflow preventer inspections. Under the proposal, customers would have to comply with current regulations on inspections, or be ...
ST. PETERSBURG, Fla. — Retired professional mechanical engineer Mike Higgins, 75, recently sent the city of St. Petersburg a letter with ideas on how to redesign backflow preventers to make them more ...
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