The following table illustrates how frequently different types of fire extinguishers must be hydrostatically tested.
Dry Chemical fire extinguishers mounted on vehicles (trucks, fork-lifts, tractors, boats, aircraft, etc.) must be hydrostatically tested every 5 years.
Hydrostatic Test Interval for Extinguishers
Extinguisher Type |
Test Interval |
---|---|
Stored Pressure Water and/or Antifreeze/Loaded Stream |
5 |
AFFF (Aqueous Film Forming Foam) |
5 |
FFFP (Film Forming Fluoroprotein Foam) |
5 |
Wet Chemical |
5 |
Dry Chemical With Stainless Steel Shells |
5 |
Carbon Dioxide |
5 |
Dry Chemical, Stored Pressure with Mild Steel Shells, Brazed Brass Shells, or Aluminum Shells |
12 |
Dry Chemical, Cartridge and Cylinder-Operated, with Mild Steel Shells |
12 |
Dry Powder, stored pressure, cartridge or cylinder operated with Mild Steel Shells |
12 |
Halogenated Agents |
12 |