We have a newly installed wet sprinkler system . The sprinklers has been installed before hydro test and flushing. The client is asking to remove the sprinklers citing NFPA. is it anywhere mentioned in NFPA ? If so pls mention the clause .
The underground was not flushed, prior to stacking the riser???
Normally hydro with sprinklers in place.
Based on the 2016 NFPA 13:
Section 184.108.40.206 requires all piping and attached appurtenances subject to the system working pressure to be hydrostatically tested at 200 psi without loss of pressure for 2 hours unless permitted otherwise by 220.127.116.11 through 18.104.22.168.
However, Section 22.214.171.124 permits the hydrostatic test performed with plugs in lieu of pendent or horizontal side wall sprinklers. The plugs must be replaced by the pendent or horizon side wall sprinklers after the tests.
Provisions for system flushing are in Sections 8.16.3, 10.10.2.1, and 126.96.36.199.
The requirements of Section 10.10.2.1 is to have the flushing of the underground piping to the system riser and the hydrants before connection is made to the fire protection system piping.
Section 8.16.8 for the piping installation has provisions to arrange the system flushing, but there were no requirements to flush the piping prior to or after the installation of the sprinklers. The results of an obstruction investigation at a later date require a system flushing. There should be no evidence of obstructions in the sprinkler piping on newly installed systems.
It appears all the above Sections including Section 25.2 Acceptance Requirements do not require flushing of the sprinkler system piping above ground and or removing the sprinklers before flushing for the required acceptance tests. See figure 25.1.
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