If you own or manage a commercial or multi-family property in Kern County, fire sprinkler inspections aren't optional — they're required by California law. But the schedule isn't as simple as "once a year." NFPA 25, the standard that governs fire sprinkler inspection and maintenance, sets different intervals depending on what component is being checked.
Here's a complete breakdown of what's required and when.
The NFPA 25 Inspection Schedule
NFPA 25 organizes inspection tasks by frequency. Most property owners are surprised to learn that some components require attention every week, not just once a year.
| Frequency | What Gets Checked |
|---|---|
| Weekly | Control valve position (open/closed); water pressure gauges on dry and pre-action systems |
| Monthly | Gauges on wet systems; alarm valves; supervisory signals to monitoring station |
| Quarterly | Sprinkler heads (visual inspection for damage, corrosion, or obstruction); control valves; water flow alarm devices; vane-type waterflow devices |
| Semi-Annual | Dry, deluge, and pre-action valves; low-point drains on dry systems |
| Annual | Full system inspection; all sprinkler heads; pipe condition; hangers and seismic bracing; fire department connections (FDC); backflow preventer; alarm valves; waterflow test |
| Every 3 Years | Dry system trip test; full forward-flow test on backflow preventer |
| Every 5 Years | Internal pipe inspection (obstruction investigation); sprinkler head sample testing for older heads (50-year replacement rule applies) |
What California Requires
California adopts NFPA 25 statewide under the California Fire Code (Title 19). Local fire marshals in Kern County — including the Bakersfield Fire Department and Kern County Fire Department — enforce these requirements and can issue violations for properties that are out of compliance.
Penalties for non-compliance can include:
- Written notices of violation from the fire marshal
- Fines and reinspection fees
- Insurance policy complications or claim denials
- Required system shutdown until compliance is restored
Annual Inspection: What's Actually Included
When a licensed contractor performs a full annual NFPA 25 inspection, here's what they check:
- Every sprinkler head — condition, orientation, clearance (18-inch rule), obstructions, corrosion, paint
- All control valves — position, accessibility, tamper seals
- Pipe condition and hangers
- Water pressure and flow
- Alarm and supervisory devices
- Fire department connection (FDC) — caps, threads, clapper valves
- Backflow preventer
At the end, you receive a signed inspection report and a compliance certificate you can provide to your insurance carrier or fire marshal on request.
The 5-Year Inspection: The One Most Owners Miss
NFPA 25 requires an internal pipe inspection — called an obstruction investigation — every 5 years. A licensed contractor opens the system at specific points to check for buildup, debris, corrosion, or microbiologically influenced corrosion (MIC) inside the pipes.
This inspection is more involved than an annual check and typically costs more. But skipping it is a compliance violation, and more importantly, a blocked pipe can mean a sprinkler that fails to suppress a fire when it matters most.
Does This Apply to Residential Properties?
Single-family homes with residential sprinkler systems (NFPA 13D) are subject to a lighter inspection standard — typically an annual visual inspection is sufficient. However, multi-family properties with 5 or more units are treated as commercial under NFPA 25 and must follow the full schedule above.
How to Stay Compliant Without Tracking It Yourself
The easiest way to stay on top of every required interval is an ITM maintenance plan — a scheduled Inspection, Testing, and Maintenance contract with a licensed C-16 contractor. The contractor tracks your schedule, sends reminders, and handles every required visit under one annual agreement.
Kern Sprinklers matches Kern County property owners with licensed C-16 contractors who offer these plans. Learn more about maintenance plans →
Schedule an Inspection in Kern County
If you're not sure when your system was last inspected — or if you've inherited a property and have no records — call us. We'll match you with a licensed local contractor who can assess your system and get you a compliance certificate.
Call (661) 384-7908 or request a quote online →