Original heating trade vintage catalog for HOFFMAN SPECIALTY COMPANY, INC. Main office and factory was located in Waterbury, CT. Executive office was located at 500 Fifth Avenue, New York City, NY. Steam Heating Equipment. Manufacturers of Adjustable Port Radiator Venting Valves, Siphon Air Valve, Vacuum Pump, Condensation Pump and Thermostatic Traps. Disbound from a large 1938 heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library.