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  2. 1946 Greenville propane explosion - Wikipedia

    en.wikipedia.org/wiki/1946_Greenville_propane...

    It was determined that the propane system was improperly constructed and installed, resulting in the gas leak. The report urged that large propane tanks be kept further away from populated areas, that automatic or remote shut-off valves be installed on them, and that new systems be inspected by an impartial qualified agency before first use.

  3. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    Discharge from the relief device is an indication that either of the two check valves is 'passing' (leaking past their shutoff seats) or the relief valve itself is faulty. Some normal water use conditions may cause short episodes of discharge (this is why check one has a minimum passing value of relief +3.

  4. Two Merced restaurants failed their county health inspections ...

    www.aol.com/news/two-merced-restaurants-failed...

    Quickly, in a shopping center on East Yosemite Avenue at Paulson Road: A Sept. 18 inspection revealed a repeat violation from 2022, a shut-off hot water valve under the kitchen handwashing sink ...

  5. Shutdown valve - Wikipedia

    en.wikipedia.org/wiki/Shutdown_valve

    A shutdown valve (also referred to as SDV or emergency shutdown valve, ESV, ESD, or ESDV; or safety shutoff valve) is an actuated valve designed to stop the flow of a hazardous fluid upon the detection of a dangerous event. This provides protection against possible harm to people, equipment or the environment.

  6. Here's How Often You Should Drain Your Water Heater ... - AOL

    www.aol.com/heres-often-drain-water-heater...

    Step 1: Shut off the cold water supply on the top of the water heater. Step 2: Next, disconnect the power to the water heater or shut off the gas supply. The water inside the tank will be hot, so ...

  7. Isolation valve - Wikipedia

    en.wikipedia.org/wiki/Isolation_valve

    Isolation valves must effectively stop the passage of fluids. [4] Gate valves, ball valves and plug valves are generally considered to provide tight and effective shut-off. Globe valves and Butterfly valves may not be tight shut-off due to wear on the plug or the seat, or due to their design, and may not be appropriate to provide effective ...

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