Standard Draft — written, not yet applied plumb.gas.hood-shutoff
Gas shutoff tripped by the hood suppression system
When a kitchen hood's fire suppression system discharges, the gas to every appliance under the hood shuts off automatically, and stays off until someone resets it by hand, so the gas line carries a valve the system trips.
| When | The app uses |
|---|---|
| the hood suppression system discharges | gas to the appliances under the hood shuts off automatically, including an appliance under the hood that needs no protection of its own |
| after a discharge | manual reset |
- Source
- NFPA 96 · 10.4 Fuel and electric power shutoff · read the public text
- Editions checked
- 2017 · 2021
- Used by
- not applied by the app yet
- Amendments
No state or local amendment to this rule is on file. Not on file means the model code as written — check your jurisdiction.
An industry standard the trade builds to.
A fire on a cook line keeps burning as long as the burners do. When the hood's suppression system fires it has to shut off the fuel and power to everything it protects, and a gas appliance under the same hood goes off with them. The gas side of that is a valve on the gas line, ahead of the first drop so one valve cuts the whole line, tripped by the suppression system and reset by hand once the fire is out.
On a bid the valve is a gap the sheets often leave: the plumbing plan may not draw it, and the suppression contractor, the hood supplier or the plumber may each think someone else furnishes it. It is an RFI before the bid, not a change order after.
What the app does with it
Nothing yet: the app does not apply this rule. It is on a course card (the plumbing course, Chapter 6, "Where does the hood's valve go?"), which has you place an RFI note on the gas line where the valve has to sit. The app does not add the valve.
Verify against your edition
NFPA 96 itself was not opened for the sign-off. The substance was read in the fire code's extract of it (NFPA 1, 2021 edition, 50.5.3, "Fuel and Electric Power Shutoff"): on actuation every source of fuel and electric power that produces heat to the protected equipment shuts off automatically, a gas appliance under the same ventilation equipment shuts off too even if it needs no protection, and the shutoff is reset by hand. The International Fire Code's commercial cooking section asks for the same interconnection, which is the one an AHJ enforcing the I-codes reads first. For the two values above: Settled 2026-09-27 by Claude on the owner's delegation, from the dossier's research and the model code text; not checked against a printed book or a local amendment. The sub-section numbers under 10.4 are NOT settled: they move between editions and were seen only in search snippets, so read them in the edition of NFPA 96 your fire marshal enforces. The valve is usually furnished with the suppression system and set in the gas line by the plumber, but who furnishes and who sets it is a contract question the sheets answer, not the standard. The electrical side of the same shutoff (a shunt trip on the circuits under the hood) is the electrician's. Looked up again 2026-09-27: secondary sources quote the 2021 sub-sections as 10.4.1 (every source of fuel and electric power that produces heat to the protected equipment shuts off automatically), 10.4.3 (a gas appliance under the same ventilating equipment that needs no protection shuts off too), 10.4.4 (the shutoff devices need a manual reset) and 10.4.4.1 (an electric gas valve is restored through a manually reset relay), with 10.4.2 exempting steam supplied from an outside source. They agree with each other and with the fire code's extract, and nobody has yet read them in NFPA 96 itself, so the sub-numbers stay unsigned.
Cited by section, not reprinted: the code text belongs to its publisher. Company practice is not a rule here — it lives with your pricing.