photo of a fire protection technician performing an inspection

Dry Chemical-CO2 System Test and Inspection Services

All of the services ASSI performs are in accordance with the latest NFPA standards.


Dry Chemical Systems: NFPA 17

Semi Annual Inspection:

  • Inspect the protected area to determine if any changes have been made in the area or to system protecting the area.
  • Check to determine if the tamper indicators are in place and if the systems have been tampered with.
  • Inspect the system for mechanical damage.
  • Disconnect the control head or pneumatic tubing from the agent cylinders.
  • Remove the cartridge from the control head and exercise the control head to ensure that it is functioning properly.
  • Check that the remote pull station is operating properly.
  • Conduct a visual inspection to determine that there is no damage to the detector or buildup of foreign debris.
  • Reinstall the cartridge and replace the control head cover and tamper indicator.
  • Inspect the cylinder pressure. Tap the gauge lightly to ensure that the needle is moving freely and has the correct operating pressure.
  • Determine if the nozzle blow-off caps are intact and undamaged and replace if necessary.
  • A detailed inspection report identifying that the system is in compliance and operational will be provided.
  • Affix a weather protected tag with a wire to the system identifying all required items per NFPA 17 and state and local codes.

Annual Inspection:

  • Inspect as per the six month maintenance standard.
  • Test operation of dry chemical system which will include operation of the detection system, signals and releasing devices, including manual pull stations and other associated equipment.
  • Inspect pressure regulators for operation to ensure equipment meets manufacturer’s recommended static outlet pressure and minimum flow tolerances.  This includes aux pressure cylinders that incorporate hand operable valves.
  • Disconnect the discharge piping from the agent cylinder.

ASSI performs Dry Chemical and CO2 Fire Protection System Test and Inspections Services throughout the New England States of Massachusetts, New Hampshire, Rhode Island, Connecticut, Maine and Vermont