AI Appraisal Estimate

This is a vintage 2.5-gallon soda-acid fire extinguisher manufactured by the Home Chemical Co. of Rochester, New York. The cylinder is constructed primarily of polished copper, featuring a prominent, large rectangular brass identification plate riveted to the center. The brass plate is embossed with clear instructions ('TO START TURN BOTTOM UP') and technical specifications, including a 'TESTED 350 LBS' rating and Underwriters' Laboratories certification marks. The top of the unit features a heavy threaded brass cap used for filling and maintenance. Attached to the side is a red rubber discharge hose with a black nozzle and brass fittings. In terms of condition, the copper body displays a moderate amount of surface patina, light tarnishing, and several small dents and abrasions consistent with its age and industrial use. Some green oxidation (verdigris) is visible near the joints and rivets. The rubber hose shows signs of aging, including stiffness and surface cracking. Based on the construction style and markings, this piece likely dates from the early to mid-20th century (circa 1920s-1950s). The craftsmanship is characteristic of commercial-grade fire safety equipment of that era, emphasizing durability through heavy-gauge metal and riveted construction.

Based on my examination of the Home Chemical Co. 2.5-gallon soda-acid extinguisher, I find it to be an authentic piece of mid-20th-century industrial safety equipment. The construction techniques—specifically the riveted brass ID plate, the Underwriters' Laboratories stamping, and the heavy-gauge copper cylinder—are consistent with manufacturing standards used in Rochester, NY, between 1920 and 1950. The 'Turn Bottom Up' instruction indicates a standard soda-acid chemical reaction mechanism. The condition is fair to good for a functional antique; while the copper retains a pleasing luster, the visible verdigris at the rivets and the degradation of the rubber hose (stiffness/cracking) are typical age-related defects. The small dents slightly detract from the aesthetic value for high-end collectors who prefer 'mint' polished surfaces. Market demand for these items remains steady among firefighting enthusiasts and 'industrial chic' decorators, though common 2.5-gallon models like this are relatively abundant compared to rarer 1-gallon or hand-pump varieties. Valuations are currently capped by the high cost of shipping these heavy items. It is critical to note that this appraisal is based on visual analysis of physical characteristics. Complete authentication would require an in-person inspection to verify the integrity of the interior lead lining and to ensure the internal cage and acid bottle (often missing or broken) are present. Furthermore, digital images cannot confirm if the unit has been decommissioned; for safety and liability reasons, I must assume the pressure vessel is no longer for active use and should be treated as a decorative historical artifact only.