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Hello ... it's a long story but I need to change a 4 port oil boiler into a 2 port boiler. The boiler in question has a connection at each corner. Which connections are most likely to be the flow in and flow out ... 'in' bottom and 'out' top on the opposite side or 'in' and 'out' on the same side?
Thank you.
Posted : 20/09/2010 8:33 pm