| http://www.w3.org/ns/prov#value | - Annually: ??? Buildings (wet-pipe) ??? Annually, prior to the onset of freezing weather, buildings with wet pipe systems shall be inspected to verify that windows, skylights, doors, ventilators, or other openings and closures, blind spaces, unused attics, stair towers, roof houses, and low spaces under buildings do not expose water filled sprinkler piping to freezing and to verify that adequate he
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