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Posted by joe t on November 25, 2009 at 07:08:16:
In Reply to: Re: Cold Return posted by tk03 on November 24, 2009 at 17:18:10:
: I am not sure what you are referring to but the water needs to get back to the boiler or it will flood the main. Are you referring to the exhaust vent as the vent pipe to the chimney? The cold spot will have nothing to do with pressure. How are you feeding water into the boiler? I am assuming you have two returns, are they wet or dry?
Yes, the return piping down to the Hartford Loop was piped around the vent pipe to the chimney using two 90 deg bends. The system is counterflow with gravity wet returns. One return is hot throughout, the other has a 3ft cold spot.
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