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Replacing boiler question?
I am about to have my CI boiler replaced with a new TT wall hung. I have a question about the size of the return piping. For my current boiler, the return piping is an inch and a 1/4 and for the TT 110, the return is 1 inch. My question is this, can I just keep the same near bolier piping 1 1/4 ( p & s) with 5 zones and reduce it to inch. I also am adding a 1 inch dirt separator to the new piping.
One of the zones is for my indirect. I know the TT has a separate DHW hook up. Do I just redo the piping to the indirect and eliminate that zone from the near boiler piping. The near boiler piping is all black iron. Thanks in advance