Two Air conditioners in the Passage 42...when the A/C circulating pump is operating, does it pump sea water through BOTH a/c units at the same time --- even if on unit is off?? My aft cabin a/c is on, and my forward a/c unit is off. Will circulating sea water flow through the forward AND aft units even if only one unit is on?? Thanks for a quick response for my WINTERIZING problem.