Guide

Class K extinguishers near cooking lines — placement FAQ

Updated 2026-09-09

If the line cooks with vegetable oils or animal fats, inspectors expect a listed Class K portable within walking distance of the hazard — and a placard that says to pull the fixed hood system first. This FAQ is an operator placement checklist. Adopted code editions vary; your AHJ wins. A Class K on the wall does not replace hood cleaning or a UL 300 wet-chemical system.

Short answer Put at least one listed Class K (wet chemical) extinguisher within 30 ft of travel of cooking equipment that uses oils/fats (NFPA 10 / IFC secondary summaries). Mount so the top is ≤5 ft for units ≤40 lb gross weight, with ≥4 in floor clearance. Where a fixed hood system protects the line, post the “actuate the system before using the portable” placard. ABC dry chemical does not satisfy the Class K requirement for the cookline.

Quick placement table

Question	Typical rule (secondary)	Cited hook
Do I need Class K?	Yes when appliances involve combustible cooking media (veg/animal oils & fats)	NFPA 10 §6.6.1 · NFPA 96 §10.9.2 (Amerex / US Made summaries)
How far?	Max 30 ft travel distance — path staff walk, not straight-line through equipment	NFPA 10 §6.6.2 · IFC 906.1
Mount height	Top ≤5 ft if ≤40 lb; heavier units top ≤3.5 ft; ≥4 in off floor	NFPA 10 §6.1.3.8 (secondary)
Placard?	Yes if an automatic system protects the hazard — actuate fixed system first	NFPA 10 §5.5.4.5.3
Primary vs backup	Fixed wet-chemical / UL 300 system is primary; portable Class K is secondary backup	NFPA 96 §10.2.1 (secondary)
Fryer sizing (IFC)	Often one 6 L (1.5 gal) per up to four fryers ≤80 lb medium each — confirm adopted IFC	IFC 906.4.2 (Amerex / US Made)

FAQ

Can I use the ABC extinguisher by the door instead?

No for the cookline Class K requirement. Secondary manufacturer and supply guides explain why: ABC powder can knock flame down briefly but does not cool hot oil the way a wet-chemical Class K agent does (saponification + cooling). Keep ABC for other building hazards; put Class K on the cooking line.

Does the hood suppression system replace the portable?

No. NFPA 96 secondary summaries treat the automatic system as primary protection and portable extinguishers as required backup for flare-ups and re-ignition after discharge — including when the fixed system is offline waiting for recharge. Missing Class K is still an inspection fail even with a perfect Ansul/system tag.

Where should it hang?

On the walking path staff would actually take to the fryers/griddle — measure travel around counters
Visible and unblocked (not behind a door swing or rolling rack)
Prefer near an exit path from the cookline so the user is not trapped behind the fire
Placard next to the unit when a fixed system protects the line

How does this relate to hood cleaning?

Different jobs on the same inspection visit. Grease cleaning (hood → plenum → duct → fan) reduces fire load in the exhaust path. Fixed suppression protects appliances/plenum/duct when a fire starts. Class K is the handheld backup. None of the three substitutes for the others.

Solid-fuel (wood/charcoal) — same rules?

Not exactly. Secondary summaries note NFPA 10 §6.7 and IFC 906.4.1 treat small fireboxes differently (water-type 2-A and/or wet chemical sizing). Confirm with your AHJ before buying to a solid-fuel spec. See our solid-fuel monthly guide for exhaust cleaning cadence.

Inspection-ready

Listed Class K within 30 ft travel of oil/fat appliances
Gauge in green; pin + seal intact; nozzle free of grease film
“Actuate system first” placard present when a fixed system exists
Monthly visual check initialed on the tag; annual service by a certified tech

Common write-ups

Only an ABC near the cookline
Unit mounted but travel path is 40+ ft around the island
No placard next to a suppressed cookline
Assuming the Class K “covers” a missed hood clean or expired suppression tag

Field checklist (send yourself this list)

Walk the path — from furthest fryer/griddle to the extinguisher; tape-measure the walking route
Read the label — look for a K (often 1-A:K); confirm wet chemical, not dry ABC
Placard — if hood system present, confirm “actuate fixed system before portable” wording your AHJ expects
Mount — top height and floor clearance; nothing stacked in front
Tag — monthly initials; annual service date not expired
Staff — secondary NFPA 96 notes call for new-hire + annual instruction on portables and manual system actuation

Who it’s for / not for

For: kitchen managers fixing an inspection note, new openings outfitting a cookline, anyone who only has ABC by the fryers
Not for: designing a UL 300 system, substituting for a fire-protection contractor, or treating this FAQ as your adopted code text

Sources

Amerex — What is a Class K fire? (manufacturer; cites NFPA 10 / NFPA 96 / IFC section hooks for placement, placard, primary vs backup)
US Made Supply — Class K commercial kitchen requirements (secondary supply guide; travel distance, mounting, IFC fryer sizing, placard)
US Made Supply — NFPA 17A wet chemical overview (secondary; fixed system vs portable Class K)
Service’d Fire Equipment — NFPA 10 placement & spacing (secondary; Class K 30 ft vs other classes)
Presidio Trust — commercial cooking extinguishing systems standard (PDF) (official local standard citing Class K + placard alongside NFPA 96 / 17A / UL 300)

Next step

Walk the cookline with a tape measure tonight. If travel to the nearest Class K is over 30 ft, or you only have ABC, or the placard is missing next to a suppressed line — fix those three before the next fire walk.