The suppression system over your cooking line is the one piece of fire protection that acts without anyone pulling a handle. It is also the one most kitchens stop thinking about once the tag is on it. The tag is not the record. Here is what sits behind it.
What the System Is
A wet chemical suppression system — many kitchens call it the Ansul, after the most common brand — runs nozzles over each appliance and through the hood and duct. Fusible links in the hood plenum melt at a set temperature; the system discharges, shuts off the fuel or power to the appliances, and in most installations trips an alarm. It is designed to put out the fire you can't reach and the one you didn't see start inside the duct.
It does that job only if it is maintained to its schedule, and only if the exhaust system around it has not been allowed to become the fuel.
The Inspection Interval
NFPA 96 and NFPA 17A require the suppression system to be inspected and serviced at least every six months by a trained, licensed technician. Fusible links are replaced at service. The system is also tested after any discharge and after any change to the appliances under it — moving a fryer, adding a charbroiler, swapping a range — because nozzle placement is specific to the appliance below it.
Six months is the ceiling, not a suggestion. A system that is seven months out is out of compliance, and the tag on it says so to anyone who reads the date.
Who Can Service It
Suppression service is a separate licensed trade from kitchen exhaust cleaning. In California it requires a state fire marshal licence; most states have an equivalent. A hood cleaning crew can and should check the system's clearances and note anything out of place, but the semi-annual service, the link replacement and the tag come from the licensed suppression company. If one invoice claims to cover both, ask for the licence number.
What the Tag Proves
The tag proves a licensed technician serviced the system on a date. That is all. It does not prove the exhaust system behind it was clean, that the nozzles still match the appliances, or that the hood and duct were not carrying a fuel load the system was never sized for.
That is why an inspector reads the tag and then asks for the rest: the hood cleaning report with grease depth in microns, the inspection interval your cooking type requires, the last date the duct and fan were cleaned, and any deficiencies noted and corrected.
The Record Behind the Tag
After a fire, the suppression system is one of five records that get asked for, usually in this order: the suppression service record, the kitchen exhaust cleaning report, the fire extinguisher inspection, the alarm test, and the sprinkler inspection if the building has one. A gap in any of them changes the conversation with the adjuster.
The most common gap is the second one. The suppression tag is current because the suppression company schedules it. The exhaust cleaning lapsed because nobody owned the date.
What to Keep on File
- Suppression service reports, every six months, with the licence number and the links replaced
- Any report of discharge, test or appliance change
- The hood cleaning report for every service, with measurements in microns and photos by section
- Your cooking type and the inspection interval it sets under NFPA 96
- One page that lists the dates, so the next date is never a surprise
EvidLY is built around that file: what has to be in it, when the next date is due, and whether the record would survive the day someone asks for it.
