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Hydrostatic Testing

Fire Extinguisher
Hydrostatic Testing

Pressure testing on the interval NFPA 10 sets for your cylinder type, with certification for every unit that passes.

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Testing Process

What Hydrostatic Testing Involves

This is a structural test of the cylinder itself, separate from what an inspection or recharge covers.

  • Cylinder emptied and fully disassembled before testing
  • Visual inspection of the shell for damage, corrosion, or denting
  • Cylinder pressurized to 1.5 times its rated working pressure
  • Pressure held and monitored for expansion or leaks during the test
  • Units that pass are refilled, reassembled, and tagged with the test date
  • Units that fail are condemned and removed from service, no exceptions

A failed hydrostatic test means the cylinder itself can no longer be trusted under pressure. There’s no partial pass, either the shell holds or it doesn’t.

Not sure when your cylinders were last tested? Test dates are checked as part of routine service.

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By Cylinder Type

Testing Intervals by Cylinder Type

The required interval depends on the extinguisher’s agent and construction, confirmed during service.

Stored-Pressure Water & Foam

Typically tested on a 5-year interval from the manufacture date.

CO2 Cylinders

Also generally tested on a 5-year interval, given the higher pressures involved.

Stored-Pressure Dry Chemical

Commonly tested on a 12-year interval, longer than water or CO2 units.

Confirmed at Service

Exact intervals vary by manufacturer and cylinder type, verified against the stamped manufacture date at every visit.

Managing a mixed fleet of extinguisher types? Testing intervals are tracked per unit, not guessed at.

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Where We Serve

Fire Extinguisher Hydrostatic Testing Across Fort Myers

Service is available throughout Fort Myers and the surrounding Lee County communities.

Downtown Fort Myers South Fort Myers San Carlos Park Gateway Iona Three Oaks Cypress Lake Fort Myers Shores
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Common Questions

Fire Extinguisher Hydrostatic Testing FAQs

The interval is based on the cylinder’s manufacture date and type, which is checked and tracked during routine inspections.
It’s condemned and removed from service immediately. A failed cylinder can’t be repaired or returned to use.
Most testing is completed same day, and can often be coordinated alongside an annual inspection or 6-year maintenance visit.
No. 6-year maintenance is an internal teardown and inspection. Hydrostatic testing is a pressure test of the cylinder’s structural integrity, on its own separate interval.

Reviewed by the Fort Myers Fire Extinguishers team. Content reflects current NFPA 10 requirements and Florida fire code standards. Last updated: July 2026.

Keep Your Cylinders Certified

Request a quote and we’ll confirm which units are due for testing. Most service calls are completed same day or next business day.

Get a Free Quote (239) 555-0100