Illinois Malleable Iron Co. · Illinois Malleable Iron Co. · leaf 297
r large jobs. This trap is suitable for heatingsystems containing not more than 3000 square feet of radiation. Price 56.00 Special Note.—The Dewey Vacuum Valve can be arranged in combination withpractically any number of quick vent air valves so as to meet the demands of any heat-ing system, no… … Diagram showing proper installation of Dewey Tri-Duty Air and Vacuum Trap, / CHICAGO, ILLINOIS 269 CHICAGO HEAT REGULATORS
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