12yr Hydrostatic Test Needed - Code Deficiency During your most recent Fire Protection Inspection, our technicians noted that one or more of your Fire Extinguishers are due for a hydrostatic test per: NFPA 10: 5.2: Dry chemical extinguishers every 12 years Removing tank from the system and perform hydrostatic testing. After hydro-testing refill cylinder with new wet chemical extinguishing agent. Fire extinguishers are required to be pressure tested using water or some other noncompressible fluid to help prevent unwanted failure or rupture of the cylinder. 6yr Maintenance Test Needed - Code Deficiency During your most recent Fire Protection Inspection, our technicians noted that one or more of your Fire Extinguishers are due for a code required 6 yr maintenance per: NFPA 10: 4.4.3 - Process includes: Disassemble extinguisher and discard old fire extinguishing agent. Inspect extinguisher cylinder for internal damage. Replace all O-rings, the valve stem, and hose. Reassemble the ex