T—T … DBTA1X No ra—Showing Arrangement of Vacuum Pump wLm turns arc he low the pump. ».— Specify the Dunham Vacuum System using Dunham Packless Radintor Valve andDunham Radiator Trap in the supply (at top) and return (at bottom) connections to andfrom each radiator (of hot water type). Dunham No. 3. 4 or…
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