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taco 00 IFC could overpump?
I would use the IFC on certain applacations...... Like with a outdoor reset boiler ,on a zone valve set up or where the radiation is lower then pump or a on demand boiler with one zone.I would not use a IFC say on a converted gravity system running a coil. Once that water moves a little spring is not going to hold it back....
It has it's place.....