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How back flush fire dept connections?

Updated: 12/14/2022
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12y ago

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HOW TO BACK FLUSH FIRE DEPT. CONNECTSby shutting off main water supply from city via the shut off valve. Then release water pressure via aux drain, main drain and inspectors test valve. assure all water is drained from Fire sprinkler system check gauges should ready zero PSI. Next locate clapper valve it will be on back side of double check valves. disassemble pipe work you will see clapper valve, reverse it ( be careful with seal or gasket not to tear) once clapper valve is reversed re assemble pipe work close main, aux and inspectors test valves. Open main valve from city water feed. You will see water is now flow through FDC clearing all debris letflow for approximately 3 minutes ( Be careful not to flood area or damage landscaping) When debris is clear? Shut off main city feed valve dis assemble pipe work restore clapper valve to normal position. Next open city water feed valve you will see water coming from main, aux and inspectors test drains close

main drain valve then aux drain valve and then inspectors test valve. you will see water gauges return to approx 165 PSI then replace covers on FDC. Then Job is completed.

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