Dear NFPA Community
I would say no
You have to flow water, and not just use a meter
Why not or there is a restriction By NFPA.
It will be for the flow test
For the pump flow test requirement, the technical committee has provided an option to allow for closed-loop, metered tests to be conducted every two out of three years as a means for completing the test. By exercising this option, building owners can save tens of thousands of gallons of water each time the test is conducted. Similarly, the technical committee added language to the annex for the backflow preventer test, saying that “closed-loop flow can be acceptable if a flowmeter or sight glass [a component that allows for the visual confirmation of flowing water] is incorporated into the system to ensure flow.”
Yes, the closed loop is the best option. I agree with you; however, the facilities consider both systems with the capacities that I mentioned. In that case, it is difficult to change to your suggestion; as a result, i want to your opinión is to possible to use both systems to develop the flow test
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