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Posted by Daniel on September 08, 2009 at 21:21:01:
I reconfigured some of the heat system piping over the summer after completing an add on to my home. I re-started my boiler and everything works but my upstairs baseboards still heat up when my pump (Grundfos UPS-58) is turned off. Is my pump letting the heated water up, sort of like gravity feed. When I touch the pipe above the pump it is as hot as on the boiler side.
Is it my pump?