UH16 Series Gas Fired Steam Boilers
All boilers in gravity return systems must be equipped with a Hartford Loop as shown in Figure 3 and 4. 7. When piping the vertical risers from the boiler to the header, the bottom of the header must be a minimum of 24 inches above the water level line on the right side of the boiler. 8. Steam riser(s) and header shall be 2½” pipe size. 9.
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