Wet Chemical Extinguishers
Air Pressurized Water (APW) extinguishers
Air Pressurized Water (APW) extinguishers cool burning material by absorbing heat. Effective on Class A fires, they have the advantage of being inexpensive, harmless and relatively easy to clean up.
Water Mist extinguishers
Water Mist extinguishers use a fine mist of deionized water to block conduction of electricity back to the operator. They are commonly used in hospitals because they are harmless and non-contaminant.
Foam-based extinguishers form a frothy blanket or seal over burning fuel, preventing oxygen from reaching the fire and can be used to progressively extinguish fires without flashback. Foam extinguishers might be used in vapor suppression; fuel fires containing alcohol; wildland operations; and the steel industry.
Class K (kitchen) extinguishers
Class K (kitchen) extinguishers contain a potassium acetate-based, low PH agent that discharges as a fine mist to help prevent grease splash and fire reflash while cooling cooking appliances. They are ideal for all cooking appliances.