Hydrostatic Testing in Downey

What this page covers

This page is about portable fire extinguishers. During a hydro test the technician empties the cylinder, fills it with water, brings it up to test pressure and watches for leaks, bulges or permanent expansion of the shell. Failed cylinders are removed from service.

Need sprinkler piping or a private fire main tested instead? See our Downey fire sprinkler service and fire hydrant maintenance pages. Most of the calls we get from Downey are about extinguishers.

When each type is due

• Dry chemical (stored pressure): every 12 years, with an internal teardown at year 6
• CO2: every 5 years
• Water: every 5 years
• Wet chemical (Class K): every 5 years

The test date is stamped on the cylinder or printed on a hydro label. Look before you call. Your annual tag runs on a separate clock, so a unit can carry a current tag from its annual certification visit while its hydro test is overdue.

Test it or replace it?

Downey callers often ask this. For a unit that is 10 years old and has never been serviced, we've recommended buying new. For a dry chemical unit close to its test date, weigh the test and recharge against a replacement; recent Downey quotes put a new extinguisher bought through Hedrick at $85.

Empty units are a separate job. Our fire extinguisher refill page covers that.

Who inspects extinguishers in Downey

Downey runs its own fire department. Business fire and life safety inspections in the city are done by the department's Fire Prevention Division, which is led by an Assistant Fire Chief/Fire Marshal. In January 2026 the city adopted the 2025 California Fire Code with local amendments.

Section 906 of the state fire code covers portable extinguishers. For questions about your own building, contact the Downey Fire Department.

Who does the work

Hedrick Fire Protection does our California work. Hedrick holds C-16 and C-10 contractor licenses and is licensed by the California State Fire Marshal under Title 19 for portable extinguisher service, which California requires of any firm that services extinguishers.

To book a hydro test anywhere in Downey (ZIP codes 90239 to 90242), call (213) 568-0188 or email socal@1profire.com. Count your units by type.

Other Downey services are listed on our Downey page. Outside the city, see hydrostatic testing in Los Angeles County or Orange County.

Hydrostatic testing questions

Does a brand-new extinguisher still need to be certified?

Yes. The fire department requires certification even for a new unit.

What makes a store-bought extinguisher certifiable?

The gauge has to show a "recharge" marking. A plastic handle rules it out.

Some of our extinguishers are already empty. Is that a hydro test?

Not usually. An empty unit needs a refill, and the cylinder gets a hydro test first only when it's past the test date for its type.