Finishing up a bathroom remodel. Need to get vanity installed for master sink. This is the location where I'd put a recirculating system for an eventual tankless HW heater. Question: do these systems require power at the remote end? Should I have my guys install a power outlet accessible under the master sink for this purpose to support that end of a recirculation system (using existing house pipes.... foolish me did not think to add a dedicated recirculation line -- but the floor was not fully open for that at the time so I will forgive myself for the oversight .