TL;DR
An extinguisher hydrostatic test is the pressurized water test that verifies a fire extinguisher's cylinder can still safely hold its charge, performed by a DOT-certified facility that fills the emptied shell beyond service pressure and checks for distortion or leakage. NFPA 10 sets the intervals — every 12 years for common dry-chemical units, 5 years for water, foam, and CO2 types.
What it means
An extinguisher hydrostatic test is the pressurized water test that verifies a fire extinguisher's cylinder can still safely hold its charge, performed by a DOT-certified facility that fills the emptied shell beyond service pressure and checks for distortion or leakage. NFPA 10 sets the intervals — every 12 years for common dry-chemical units, 5 years for water, foam, and CO2 types. A passing cylinder gets a stamped or labeled test date; failures are condemned, which is why old extinguishers are often cheaper to replace than retest.
Where it sits in the glossary
Extinguisher hydrostatic test is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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