Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 538
AIR INLET VALVE WHERE THEREIS AN AREA IN FRONT OF BUILDING The Perfect Self-Scouring Anti-syphon Basin Trap (Figs. 4 and 5) is the mostpractical and best proportioned Anti-syphon Trap at present devised. It has great re-sisting power against syphonic action and has a large evaporating surface. This…
Building materials
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