Posted 2/18/2017 10:14 (#5847744 - in reply to #5847423) Subject: RE: don't want to hijack the thread but
West central ND
Kw if you're referring to the valve on top of the expansion tank it is an air eliminator. It was 10 years before I added any. The simplest method I have heard it a gear pump on an electric drill. I used distilled water to mix with the antifreeze. Total liquid capacity was only about 35 gallons. Shop is 60 X 72. 4500 feet of 1/2 pipe.
Adding water to in floor heat system
