WHAT IS A HYDROSTATIC TEST / HYDRO TEST ON A PORTABLE FIRE EXTINGUISHER

Hydrostatic Testing (Hydro Testing) is a process performed on a fire extinguisher cylinder. A licensed technician will perform this service by filling the cylinder with water and pressurizing it to an increased PSI level following manufacturer guidelines while using specialized equipment. This will test for overall strength and integrity of the fire extinguisher cylinder. Hydro testing is a critical required service that ensures your fire extinguisher will be safe and perform as intended in the event of a fire emergency.

What are the Steps to a Hydrostatic Test on a Portable Fire Extinguisher

Step One – Visual Inspection
Step Two – Remove Discharge Hose
Step Three – Discharge Fire Extinguisher
Step Four – Remove Valve Head Assembly & Powder Residue
Step Five – Internal Cylinder Examination
Step Six – Hydro Test Fire Extinguisher
Step Seven – Drain and Dry Fire Extinguisher
Step Eight – Install New Valve Stem and Collar Gasket
Step Nine – Affix Service Collar and Hydro Label
Step Ten – Refill Fire Extinguisher with Chemical
Step Eleven – Assemble and Recharge Fire Extinguisher
Step Twelve – Install New Tamper Seal and Hose
Step Thirteen – Affix New Inspection Tag

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HOW OFTEN DO FIRE EXTINGUISHERS NEED HYDROSTATIC TESTING

Every 12 years for Dry Chemical, Clean Agent (Halotron, Halon 1211, Clean Guard) and D Class Fire Extinguishers.

Every 5 years for Carbon Dioxide, Wet Chemical (K-Class), Water Mist and Stored Pressure Water Fire Extinguishers.