PASS — Pull, Aim Low, Squeeze, Sweep Is the Four-Step Extinguisher Operation
Claim: PASS (Pull · Aim · Squeeze · Sweep) is the universal four-step sequence for operating a portable fire extinguisher. Each step has a specific failure mode if skipped: a missing pin pull means the lever won’t actuate; aiming at the flames (not the base) disperses the agent above the fuel; squeezing too fast empties the cylinder before the fire is out; stopping the sweep too early allows the fire to re-establish. The technique is learnable in 30 seconds but must be learned before the fire.
The four steps and their failure modes
| Step | Action | Failure mode if skipped/done wrong |
|---|---|---|
| Pull | Remove the safety pin from the handle | Lever won’t actuate — extinguisher appears broken |
| Aim | Point the nozzle low, at the base of the fire (not the flames) | Agent disperses into smoke above the fuel source; fire continues |
| Squeeze | Depress the lever slowly and evenly | Jerky pressure empties the cylinder faster; also splatters agent unevenly |
| Sweep | Move the nozzle side to side across the base, advancing toward the fire | Stops too early = fire re-ignites at the edges; standing still = uneven coverage |
Operating parameters
- Starting distance: 2.5 metres (6–8 feet) from the fire base.
- Discharge time: approximately 8–15 seconds for a standard 5 lb ABC unit.
- Move closer as the fire diminishes — don’t stay at maximum range for the entire discharge.
- If the fire does not diminish in the first few seconds: stop, back out, evacuate. The fire is larger than the extinguisher can handle.
Relationship to the fight-vs-evacuate decision
PASS is the how of fighting a fire. The whether — the four-condition rule (small, contained, 9-1-1 called, clear exit) — must be checked first. PASS should only be initiated after the fight decision is made. Starting PASS without confirming exit availability is the classic sequence error.
Scope
- Applies to ABC dry chemical, BC dry chemical, and wet chemical (Class K) portable extinguishers.
- CO2 extinguishers use the same PASS sequence but have a shorter discharge time and require holding the handle (not the horn, which freezes to −79 °C).
- Does not cover fixed suppression systems (kitchen hood systems, fire sprinklers).
Sources
- Vancouver Fire and Rescue Services — PASS technique and 2.5m operating distance — https://r.jina.ai/https://vancouver.ca/home-property-development/fire-extinguishers.aspx
- CCOHS — PASS steps and floor/wall fire sweep variations — https://www.ccohs.ca/oshanswers/safety_haz/fire_extinguishers.html
- Kidde Canada — PASS technique with 5-foot minimum distance and squeeze emphasis — https://www.kiddecanada.com/en/safety-hub/fire-extinguishers/choosing-a-fire-extinguisher-for-your-home
Idea Compass
North: Where this comes from
- fire-extinguishers (Home Systems) — the parent note; PASS is one of its core procedures
- Vancouver Fire and Rescue Services — the local authority for PASS guidance
East: Tensions / failure
- Fight-vs-Evacuate-Decision-Rule-for-Home-Fires (Home Systems) — the decision that precedes PASS; you can execute PASS perfectly on a fire that’s already too large and still lose
- Aiming at the flames (not base) — the single most common technique error
South: Where this leads
- evacuation-plan (Home Systems) — the plan that activates if PASS fails or the discharge ends before the fire does
- Post-discharge recharge — after any use, the extinguisher must be recharged before it is returned to service
West: What’s similar
- EpiPen use sequence (jab-click-hold) — same pattern: a simple sequence with a specific failure mode at each step, trained before the emergency
- smoke-co-detectors (Home Systems) — the alarm that gives you the seconds to decide and reach the extinguisher before starting PASS