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How often must I have my fire extinguishers hydrostatically tested?

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
(Years)

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

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