Got a fire inspector's notice? Start here
Diamond Bar contracts with the Los Angeles County Fire Department for fire protection, and the department's Fire Prevention offices handle plan check and inspection for businesses. The county's list of those offices includes one in Diamond Bar, at 1061 S. Grand Ave., phone (909) 569-0758. Not sure what a correction notice is asking for? That office can explain it.
Then call us. If an inspector wrote you up for an expired tag, a missing extinguisher or the wrong class of unit for the hazard, we service or install what the notice lists. Keep the notice handy. We'll work from it.
Between visits, the owner does a quick monthly look at each unit. The yearly work is ours.
What happens at the annual service visit
Once a year, a licensed technician goes through every extinguisher in the building. They check the pressure gauge, the pin and tamper seal, the hose and nozzle, the label and the shell for dents or corrosion, and they confirm each unit is mounted, visible and easy to reach. Then each unit gets a new tag. The tag records the service. Your inspector reads it.
Some years bring more work. Stored-pressure dry chemical units get an internal teardown every six years. A hydrostatic test of the cylinder comes every 12 years for dry chemical and every 5 years for CO2, water and wet chemical (Class K) units, so a building with mixed types will see these come due at different times.
Fire extinguisher installation in Diamond Bar
New space? New hazard? The right extinguisher depends on what could burn:
- Class A: ordinary combustibles such as paper, wood and cloth
- Class B: flammable liquids
- Class C: energized electrical equipment
- Class D: combustible metals
- Class K: cooking oils and fats
Most general spaces use multi-purpose ABC units. Placement follows California Fire Code Section 906, the state's version of the International Fire Code rule on portable extinguishers. We match the type to each hazard and mount every unit where people can see and reach it.
Kitchens with a hood suppression system also need a Class K portable extinguisher. Hedrick is licensed to install and service those hood systems as well (see kitchen fire suppression service in Diamond Bar).
Who may service extinguishers in California
State law is strict here. In California, extinguisher service has to be done by a firm and technician licensed by the State Fire Marshal under Title 19. 1 Pro Fire's California work is done by Hedrick Fire Protection, which holds C-16 (fire protection) and C-10 (electrical) contractor licenses and is licensed by the State Fire Marshal under Title 19 for portable extinguisher service.
Price and booking
A Diamond Bar quote from March 2025 was $35 per extinguisher for inspection. The price can change if a unit needs more than routine maintenance. Extra recommended work is your call. You can decline it. Cards are accepted.
For Fire Extinguisher Service in Diamond Bar, call us at (213) 568-0188 or email us at socal@1profire.com with your address and how many extinguishers you have. Our Diamond Bar fire protection page lists the other services we do in the city.
Quick answers on extinguisher service
Do you issue a certificate or tag of inspection?
Yes, a tag. Every extinguisher we service gets one, and it is what a fire inspector checks. If a landlord or insurer wants other paperwork, ask about it when you book.
What should I check each month?
Look at every unit. The gauge needle should sit in the green, the pin and seal should be in place, and nothing should block the extinguisher or hide it from view.
Do my employees need extinguisher training?
If you provide extinguishers for employees to use, OSHA requires training when they are hired and at least once a year after that. See fire extinguisher training in Diamond Bar.
Do you cover ZIP code 91789?
Yes. Diamond Bar uses 91765 and also 91789, which it shares with Walnut. Businesses in either Diamond Bar ZIP can book with us.
What if my building is outside Diamond Bar?
We also handle fire extinguisher service across Los Angeles County and in San Bernardino County.
Book extinguisher service in Diamond Bar
- Annual inspection and tagging
- New extinguisher installation