StamparioExtinguisher hydrostatic test and 6-year maintenance dates
Stored-pressure dry chemical extinguishers with steel shells, and halon units, get a hydrostatic test every 12 years and an internal maintenance every 6 years. CO₂, water, foam, wet chemical and stainless-steel dry chemical units are hydro tested every 5 years. Count from the year of manufacture, or from the last hydrostatic test.
The intervals
- 12-year hydro and 6-year maintenance: dry chemical stored pressure (mild steel or brazed shells), halon
- 5-year hydro: carbon dioxide, water and antifreeze, wetting agent, AFFF foam, dry chemical in stainless steel, wet chemical (Class K, per NFPA 10)
- Every year: annual maintenance; every month: a visual inspection
OSHA 1910.157 lists the hydrostatic intervals in Table L-1 and requires 6-year maintenance for stored-pressure dry chemical units that need a 12-year hydro. The NFPA 10 edition your fire code adopted and the manufacturer’s manual have the details.
Common questions
Does a hydro test restart the 6-year clock?
Yes. The 6-year maintenance is counted from the last hydrostatic test, or from manufacture if there hasn’t been one.
Can Stampario remind me?
Each unit row on the extinguisher report has a next-hydro year, and the yearly inspection lands on your call list.
Sources
Codes change by edition and the authority having jurisdiction (your fire marshal, water purveyor or state agency) decides which rules apply. This page is general information, not legal advice.