S slink New Member Joined Feb 7, 2020 Messages 1 Reaction score 0 Location maine Feb 7, 2020 #1 This fitting is on my hydronic heating system before the expansion tank, what the heck is it for? Thanks
This fitting is on my hydronic heating system before the expansion tank, what the heck is it for? Thanks
V voletl Well-Known Member Joined Dec 17, 2014 Messages 800 Reaction score 250 Location New York Feb 7, 2020 #2 Could be a flow control. If you just have circulator pumps they are installed to prevent heat migration before circulator had internal checks.
Could be a flow control. If you just have circulator pumps they are installed to prevent heat migration before circulator had internal checks.
