Zone valve question

Discussion in 'Boiler Forum' started by, Oct 20, 2012.

  1. New Member

    Oct 20, 2012
    New Jersey USA
    I have a well mclain cgi gas fired hot water system boiler. We added a room on the second floor and want to make a seperate zone with a seperate thermostat. The boiler has one circulator pump which is on the return side of the system. Where should I install the two zone valves on the return or on the feed side of the boiler. Also I have been looking at the TACO zone valves. One last thing the original feed for the first floor was piped using 1 inch and the room on the secon floor was piped using 3/4.
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