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68 NWPCA Fire Code Compliance Manual for Outdoor Storage of Wood Pallets | Version 1.0 (December 2017) Fire-extinguishing System Frequency of Action Clean agent Testing and Inspection: At least annually [NFPA 2001 §7.1] Maintenance: As required [NFPA 2001 §7.5] Halon 1301 Testing and Inspection: At least semiannually [NFPA 12A §7.1] Maintenance: As required [NFPA 12A §6.5] Dry Chemical Inspection: Monthly [NFPA 17 §11.2] Maintenance: Semiannually [NFPA 17 §11.3] Recharging: As indicated or after use [NFPA 17 §11.4] Wet chemical Inspection: Monthly [NFPA 17A §7.2] Maintenance: Semiannually [NFPA 17A §7.3] Recharging: As indicated or after use [NFPA 17A §7.4] Water-based Extinguishing systems. This section covers the general requirements for inspection, testing, and maintenance of water-based sprinkler suppression systems. A summary of sprinkler system inspection, testing, and maintenance extracted from NFPA 25: Item Frequency Method Inspection Control Valves Verify all valves are in service in the open position, accessible and properly sealed, locked, or electronically supervised. Must be free of physical damage. Check quarterly if electronically supervised. Check monthly if secured with locks. Check weekly otherwise. Fire department connection Quarterly Verify connections are visible, accessible, free of physical damage, and free of interior obstructions. Plugs, caps, and gaskets shall be in place and undamaged. Couplings and swivels shall rotate smoothly and be undamaged. Automatic drain valve shall be in place and operating properly. Gauges (wet and deluge) Quarterly Verify normal water supply pressure is being maintained. Gauges (dry and preaction) Quarterly/Monthly Verify that normal air pressure is being maintained. Compare gauge near compressor and gauge above dry pipe/ preaction valve monthly.