Annual Backflow Inspection (7) Annual Sprinkler System Inspection Semi-Annual Sprinkler System Inspection Quarterly Wet Sprinkler System Inspection Quarterly Dry Sprinkler Inspection Deficiency: Bistro Restaurant Dry system is due for 3 year pressure test 5 year FDC hydro test is due 5 year internal inspection and gauge replacement is due for both systems 2-5 year internal inspections FDC hydro test 3 year pressure test 3 water gauges 1 air gauge