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Hydrostatic Test when Replacing Heads

Question asked by rceppi on Mar 22, 2018
Latest reply on Mar 22, 2018 by cdafd

If sprinkler heads are replaced due to age and a 200 psi hydrostatic test was performed on the system a month earlier, is it required per NFPA 13 to perform another hydro after replacing the sprinkler heads?  There is 100 psi static pressure on the wet system.  Is an in-service test sufficient to test for leaks?