UTICA BOILERS SFH Series Installation, Operation & Maintenance Manual page 15

7 - CONNECTING SUPPLY AND RETURN PIPING
OPTIONS UTILIZING 3/4" TAPPING
Figure #13 - Optional Location For Air Vent
Figure #14 - Optional Location For Expansion Tank (Non-Diaphragm Type)
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P/N 240009735, Rev. G [09/30/2016]