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Typical old hydronic system, 1.5 inch steel pipe through basement with cast iron radiators.. A Runtal is installed with poor flow in the kitchen of 1/2 copper lines, as we know there is a lot of options- if a Grunfos Alpha is installed on the 1/2 copper lines & plugged in to a regular outlet will it sense flow when the main zone kicks in and happily pump more flow to the Runtal radiator? My thought is that it won't get the jolt it needs to kick in...