Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 552
ach radiator to be equippedwith the M.ARSH Acme No 6 L. Autom.atic Air Valve, or the MARSH ACME No. 6, or the Marsh-Paul Automatic Air Valve. AUTOMATIC AIR VALVES. ETC. 481 NORWALL MANUFACTURING CO. NORWALL MANUFACTURING COMPANY M.\NUF.\CTURERS OF Automatic Air Valves, etc. 42 East 23d StreetNEW… … The Allex Automatic Air Valve, the Norwall Automatic Air Valve,the Norwall Automatic Air and Vacuum Valve, the Norwall Packless,Quick Opening, Radiator Valve, and the Norwall AirLine System of Vacuum Steam Heating. The Norwall and Allen Automatic Air Valves are madeentirely of metal. No perishable…
Building materials
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