Annual Maintenance:

• Check gauge pressure
• Check gauge condition and compatibility
• Check last hydro-test date (if applicable)
• Check last 6-year maintenance inspection (if applicable)
• Check valve and shell for damage or corrosion
• Check hose condition for cracks or splits
• Check hose threads
• Check hose for for obstructions
• Break seal and remove pin
• Check upper and lower handles
• Replace locking pin and reseal
• Check valve opening for powder or any foreign matter
• Fluff powder (if applicable)
• Clean shell (with spray if needed)
• Check band
• Ensure unit classifications & instructions are  legible
• Observe  hazard
• Ensure unit corresponds with the hazard
• Ensure unit is properly hung with the proper manufacturer’s hanger
• Ensure unit has been properly placed within the normal path of travel and at proper height
• Ensure use is properly identified with class decal
• Ensure unit is visible and unobstructed
• Tag extinguisher indicating the type and date of maintenance and identify the person or company who performed the service
  

Six-year Maintenance:

• Perform all Annual Maintenance checks
• Discharge extinguisher
• Clean and inspect valve and siphon tube, replacing worn / damaged parts as needed
• Inspect shell interior
• Install verification of service ring (shows unit has been properly disassembled and checked)
• Fill and re-pressurize extinguisher with appropriate chemical
• Install 6-year maintenance label showing date of service

Hydrostatic Test (performed at 12 year intervals):

• Perform all Annual Maintenance items
• Perform all Six-Year Maintenance items
• Perform hydrostatic pressure test on unit at 3x operating pressure (or as indicated on unit)
• Thoroughly dry unit interior, fill, and re-pressurize extinguisher with appropriate chemical
• Install hydrostatic pressure test label showing date of service and test pressure