In addition, lower friction losses mean more available flow and pressure.
Since the sprinkler system or hydrant is fed from two directions, a portion of the loop can be impaired, if necessary, without impairing the entire system. Looped arrangements are desirable due to their high reliability. Looped fire mains are commonplace at industrial facilities and campuses where the fire main supplies numerous hydrants and sprinkler systems. We do this on a regular basis to ensure that our water supply is adequate for sprinkler systems and the fire department.Ī loop test is only applicable with looped fire main arrangements similar to the sketch above. Most people familiar with fire protection systems know that a fire flow test involves measuring the flow rate from a hydrant while also measuring static and residual pressures.
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