Hydrostatic Testing in Los Angeles

Is your extinguisher due for a hydro test?

Check the cylinder first. Most extinguishers carry a label or stamp showing the last hydrostatic test, and that date starts the clock. Dry chemical units go 12 years between tests. CO2, water and wet chemical (Class K) units run on a shorter cycle: every 5 years.

Hydro is separate from the yearly tag. A certified technician does annual maintenance every year and records it on the tag, and stored-pressure dry chemical units also get an internal teardown at the 6-year mark. The hydro test is the least frequent of the three.

People ask about this a lot. Most of the calls we get from Los Angeles are about extinguishers, and the recharge, teardown and hydro cycle comes up often.

What happens during the test

A hydrostatic test shows whether the shell can still hold pressure. The technician empties the unit, removes the valve and looks over the cylinder inside and out for corrosion, dents and damaged threads. Next, the cylinder is filled with water and brought up to its test pressure while the technician watches for leaks, bulging or permanent stretch. Why water? It barely compresses, so a weak shell that fails under water pressure leaks or splits instead of releasing stored energy the way a gas-filled cylinder would. A cylinder that passes is dried, recharged, reassembled and labeled with the new test date. A failed one comes out of service.

Los Angeles rules and who may do the work

Inside city limits, business fire code enforcement belongs to the Los Angeles Fire Department's Fire Prevention Bureau. The city's fire code is based on the California Fire Code, and Section 906 of that code covers portable extinguishers. Code editions change. If an inspector cites a section, ask the LAFD Fire Prevention Bureau which edition applies.

California requires extinguisher service to be done by a firm and technician licensed by the State Fire Marshal under Title 19. Our California work is performed by Hedrick Fire Protection, which holds C-16 and C-10 contractor licenses and is State Fire Marshal licensed under Title 19 for extinguisher service and for testing and maintenance of water-based systems.

Some addresses with a Los Angeles mailing ZIP, including 90022, 90023 and 90040, sit outside city limits under other jurisdictions. For those, see hydrostatic testing in Los Angeles County.

What recent Los Angeles quotes looked like

Hydro testing is priced on-site. The technician needs to see the type, size and condition of each unit first. Recent quotes for annual certification in Los Angeles have run $35 to $40 per extinguisher, with any 6-year maintenance or 12-year hydro test priced at the visit if a unit turns out to need it.

Sometimes a replacement makes more sense than a test. If a cylinder is visibly damaged, or old enough that a new unit costs about the same as servicing it, the technician can price both options on-site. Recent quotes for a new 5-lb ABC extinguisher have run $80 to $85 plus tax, certified for the first year. Compare the two. Then decide.

Hydro testing questions from Los Angeles callers

When is hydrostatic testing required for a fire extinguisher?

Every 12 years for dry chemical units. CO2, water and wet chemical units are due every 5 years.

My two 10-lb extinguishers are overdue. Recertify or replace?

It depends on their condition and their last test dates. The technician checks both and can price service or replacement on-site, so you can compare before any work is done.

Does a brand-new extinguisher need certification?

Not the first year. The new units we've quoted come certified for the year, and after that they need annual service.

Will the technician sign off if the extinguisher passes?

Yes. A unit that passes annual maintenance gets tagged. If it needs a hydro test or replacement instead, the technician prices that work on-site.

To book hydrostatic testing in Los Angeles, call (213) 568-0188 or email socal@1profire.com