What is a red tag on a fire suppression system?

A red or deficiency tag means the technician found a problem that keeps the system from being fully compliant or operable. Tag colors and terms vary by state and company; read the written report for the exact deficiency.

Can I keep cooking if my hood system fails inspection?

It depends on the deficiency and your local fire marshal. If the system cannot operate, the kitchen may be told to stop using the protected appliances until it is repaired. Ask your inspector and AHJ.

Do I need a new system if I add a fryer?

Not always, but the system has to be evaluated. The inspector may be able to add or re-aim nozzles within the manufacturer’s design limits, or the system may need modification.

Is a dry-chemical kitchen system still acceptable?

Many jurisdictions expect commercial cooking systems to meet UL 300, which older dry-chemical systems do not. Ask your fire marshal and inspector about your specific system.

What Fails a Kitchen Hood Fire Suppression Inspection?

Updated October 2026. General information, not legal advice. Your local fire marshal (AHJ) and the system manufacturer's manual control.

A failed semi-annual inspection usually means the technician found a deficiency and either tagged the system as needing repair or, if it cannot work, put it out of service. Fire marshals also cite kitchens on routine visits when the tag is expired. Most failures fall into a handful of predictable categories.

Common reasons a system fails

Appliances moved, swapped, or added. Nozzles are aimed at specific appliances. A new fryer, charbroiler, or wok station outside the design coverage is one of the most common write-ups.
Expired inspection tag. More than six months since the last service.
Fusible links not replaced, greasy, or the wrong temperature rating for the appliance.
Nozzles clogged with grease, missing blow-off caps, or pointed the wrong way.
Pull station blocked, hidden, or missing its seal.
Gas shutoff valve or electric shunt trip does not shut the appliances off when the system trips.
Low cylinder pressure, a damaged cylinder, or a cylinder past its 12-year hydrostatic test date.
Older dry-chemical systems or systems the manufacturer no longer supports. Many AHJs expect UL 300 wet-chemical protection.
Missing Class K portable extinguisher.
Heavy grease buildup in the hood and duct, which is a hood-cleaning issue but often noted on the same visit.

What happens next

The inspector leaves a written report listing deficiencies. Small items such as links, caps, or a seal are often fixed on the spot. Coverage problems and obsolete systems need a quote for modification or replacement. Until the system is compliant, the kitchen risks a citation from the fire marshal and problems with its insurer. Local rules on re-inspection and shutdown vary, so check with your AHJ.

How to avoid a failed inspection

Call your inspector before you move or add any cooking appliance.
Do the monthly owner check and keep a log.
Keep the pull station clear and visible.
Keep hood cleaning on schedule so nozzles and links are not buried in grease.
Book the next semi-annual visit before you leave the current one.

Find a licensed inspector by city

HoodInspect lists wet-chemical kitchen suppression inspectors (not hood cleaners) in Dallas, Houston, Austin, Atlanta, Miami, New York City, Los Angeles, San Diego, Chicago, Phoenix, Washington DC, Philadelphia, and Denver.

Frequently asked questions

What is a red tag on a fire suppression system?: A red or deficiency tag means the technician found a problem that keeps the system from being fully compliant or operable. Tag colors and terms vary by state and company; read the written report for the exact deficiency.
Can I keep cooking if my hood system fails inspection?: It depends on the deficiency and your local fire marshal. If the system cannot operate, the kitchen may be told to stop using the protected appliances until it is repaired. Ask your inspector and AHJ.
Do I need a new system if I add a fryer?: Not always, but the system has to be evaluated. The inspector may be able to add or re-aim nozzles within the manufacturer’s design limits, or the system may need modification.
Is a dry-chemical kitchen system still acceptable?: Many jurisdictions expect commercial cooking systems to meet UL 300, which older dry-chemical systems do not. Ask your fire marshal and inspector about your specific system.

Sources

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