Kidde Soda-Acid Fire Extinguisher Value Guide

The Kidde Soda-Acid Fire Extinguisher is a quintessential piece of early 20th-century safety history, manufactured by the renowned Walter Kidde & Company founded in 1917. These brass and copper vessels are highly collectible for their industrial aesthetic and represent the transition from primitive firefighting to modern chemical suppression technology.

What affects the value of Kidde Soda-Acid Fire Extinguisher?

• The condition of the brass and copper exterior, specifically the absence of major dents or heavy oxidation, significantly impacts the $150-$200 price point.
• Completeness of the unit, including the original internal components and the exterior hose, increases collector interest.
• The legibility and preservation of the original instructional labels or etched metal plates.
• Provenance or markings indicating specific historical use in notable commercial or industrial settings.

How to Identify Kidde Soda-Acid Fire Extinguisher?

• Look for the embossed or etched Walter Kidde & Company nameplate on the front of the brass or copper cylinder.
• Verify the presence of the internal glass acid vial or the cage mechanism used to hold the sulfuric acid.
• Check for the characteristic black rubber hose and nozzle, which are often missing or replaced on authentic units.
• Examine the top screw-on cap for heavy brass construction and original threading consistent with 1920-1940 manufacturing.

History of Kidde Soda-Acid Fire Extinguisher

Walter Kidde & Company, founded by Walter Kidde in 1917, became a prominent manufacturer of fire safety equipment. Soda-acid fire extinguishers were among the earliest and most common types, operating on a chemical reaction between sodium bicarbonate and sulfuric acid to expel a stream of water and foam. These extinguishers were widely used in commercial, industrial, and residential settings before being largely replaced by more effective and safer modern alternatives.