Amerex Water Mist Fire Extingu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$518.99
Amerex WM 2 1/2 Water Mist Fire Extinguisher, 2.5 gal, Class A:C, 2A:C UL Rating, anodized aluminum valve

Amerex Water Mist Fire Extinguisher 2.5 Gallon 2A:C Rating Anodized Aluminum Valve

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Model: WM 2 1/2
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Amerex WM 2 1/2 Water Mist Fire Extinguisher

The Amerex WM 2 1/2 is a 2.5-gallon stored-pressure water mist extinguisher rated 2A:C by UL and ULC. It uses de-ionized water discharged through a misting nozzle that reduces electrical conductivity, making it suitable for Class C electrical hazards alongside ordinary Class A combustibles. Intended for environments where a clean, low-residue agent is required: healthcare facilities, data centers, clean rooms, and office buildings.

Key Features

  • 2A:C UL/ULC Rating - Effective on Class A ordinary combustibles and Class C electrical fires
  • De-ionized Water Agent - No conductive residue; safe for sensitive equipment and occupied spaces
  • Misting Nozzle - Fine spray pattern limits electrical shock risk and maximizes cooling and soak
  • Anodized Aluminum Valve - Corrosion-resistant construction for long service life
  • 80-Second Discharge - Extended duration with 10-12 ft effective range at 100 PSIG operating pressure

Specifications

  • Capacity: 2.5 Gallon
  • Agent: Water Mist (de-ionized water)
  • UL/ULC Rating: 2A:C
  • Operating Pressure: 100 PSIG
  • Discharge Time: 80 seconds
  • Effective Range: 10-12 ft
  • Overall Height: 24.5"
  • Overall Width: 9"
  • Depth: 7"
  • Product Width: 11"
  • Shipping Weight: 8 lbs
  • Temperature Range: +40°F to 120°F
  • Valve: Anodized Aluminum

Manufacturer Resources

Larsens Catalog

Product Specs

Temperature range:
+40°F to 120°F
Overall height:
24.5"
Overall width:
9"
Capacity:
2.5 Gallon
Chemical:
Water Mist
Discharge Time:
80 seconds
Range:
10-12 ft
Valve Type:
Anodized Aluminum
Shipping Weight:
8 lbs
UL and ULC Rating:
2A:C
Discharge time:
80 sec
Nominal Operating Pressure:
100 PSIG
Product Group:
Device Protection and Alarms
Product Subgroup:
Fire Extinguishers and Accessories
Product Type:
Water Mist Extinguisher
Product Details:
Water Mist
Department:
Safety
Product Width:
11 "
Product Depth:
7 "

Amerex WM 2 1/2 – Frequently Asked Questions

1) Can you use a water mist extinguisher on live electrical equipment?
Yes. The Amerex WM 2 1/2 water mist extinguisher carries a 2A:C UL and ULC rating, and the C means it is rated for energized electrical equipment. The misting nozzle is what makes that possible: it breaks the discharge into a fine spray rather than a solid stream, which is what provides safety from electrical shock. The agent is de-ionized water, so there is no conductive mineral content. This is the reason it gets specified for server rooms, telecom closets and around medical equipment where a standard 2A water can extinguisher would be a hazard.
2) Can a water mist extinguisher be installed in an unheated garage or loading dock?
No. The Amerex water mist unit is listed for +40F to 120F, and below that the de-ionized water charge is at risk of freezing, so it cannot go in an unheated garage, loading dock, parking structure, attic or exterior cabinet in a cold climate. Water mist belongs in conditioned interior space. For an unheated area with the same Class A and C hazards, an ABC dry chemical extinguisher is the normal substitution because it is rated well below freezing.
3) Will a water mist extinguisher put out a kitchen grease fire or a flammable liquid fire?
No, and this is the one to get right. The Amerex water mist unit is rated 2A:C only. There is no B in that rating, so it is not for flammable liquids, and it is not a Class K unit for cooking oils and fats. Discharging water on either one can spread the fuel. For a commercial kitchen hood line you need a Class K wet chemical extinguisher; for a flammable liquid hazard, a unit carrying a B rating such as ABC dry chemical or CO2.
4) Water mist or a clean agent extinguisher for a server room or hospital equipment area?
Both leave less behind than dry chemical, but they do different jobs. A water mist unit like the 2.5 gallon Amerex is rated 2A:C, so it carries a real Class A rating for ordinary combustibles, paper, trash, bedding, and its de-ionized mist cools and soaks the fuel over an 80 second discharge. A halocarbon clean agent puts out nothing behind at all and is the choice when even a fine water mist on the equipment is unacceptable. The usual split: water mist where people and paper are the main fire load and the electrical risk is secondary (patient care areas, classrooms, offices with server closets), clean agent where the equipment itself is the thing being protected. Water mist is also the one to pick over ABC dry chemical anywhere you do not want powder residue on electronics.
5) What rating does a 2.5 gallon water mist extinguisher count for when spacing Class A extinguishers in a building?
It is rated 2A:C, so it counts as a 2A unit for travel distance and floor area calculations, plus it covers Class C. For a hospital, school or office where the code official is working to a Class A hazard, the 2A is the number that goes on the schedule. Because it also carries the C, one water mist unit can cover both the ordinary combustible load and the energized electrical risk in the same space, instead of hanging a water extinguisher and a separate electrical-rated unit side by side.
6) Why choose water mist over a regular 2.5 gallon pressurized water extinguisher in a school or office?
Two reasons. A standard pressurized water unit discharges a solid stream and is rated 2A only, with no Class C, so it cannot be used on energized equipment. The Amerex misting version is rated 2A:C and its fine spray plus de-ionized fill removes the shock concern. Second, the mist pattern puts far less water into the room than a stream does, so collateral damage to carpet, electronics and paper is smaller while the cooling and soaking action on the Class A fuel is actually better. In a computer lab or a classroom with AV gear, that is the whole argument.
7) What does the pressure gauge need to read on an Amerex water mist extinguisher?
Nominal operating pressure is 100 PSIG, so the needle should sit in the green with the gauge face reading at that nominal value during a monthly inspection. A stored pressure water type unit that has drifted low needs to go back for service rather than being topped off in place. Anything outside the operable range on the gauge, or an extinguisher that has been stored outside its +40F to 120F range, gets pulled.
8) Is the valve on the Amerex WM 2 1/2 water mist extinguisher brass or aluminum?
Anodized aluminum. On a water type extinguisher that matters more than it does on a dry chemical unit, because the valve and cylinder are in constant contact with the charge, and the anodized surface resists the corrosion that would otherwise show up over years of stored pressure service. It also keeps the unit light for a 2.5 gallon capacity, which is the difference between an extinguisher an office worker can lift off a bracket and one they cannot.
9) What mounting hardware comes with the Amerex water mist extinguisher, and what else is needed to finish the installation?
Plan on supplying the mounting hardware, the bracket or cabinet, and the extinguisher signage separately. The install itself is a wall mount in an accessible, visible location inside the +40F to 120F range, with a clear access path. For a recessed or semi-recessed cabinet installation, size the tub for the 24.5 inch height first. Amerex covers the unit; the bracket, cabinet and sign are the line items people forget on a submittal.
How fast can I get the Amerex WM 2 1/2 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Amerex WM 2 1/2 come with a warranty?
Absolutely. The Amerex WM 2 1/2 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Amerex WM 2 1/2?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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