Illinois Malleable Iron Co. · Illinois Malleable Iron Co. · leaf 305
ch 4.50 No. 6 No. 6 Hoffman Quick Vent Float Air and Vacuum Valve, for quick vent servicewhere it is desired to control or prevent the emission of either steam or water through thevalve, and also to prevent return of air to stack or line to which valve is connected. Ventport, 3/j6 inch; can bejnade…
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