Most that I've seen have a simpler solution and that is a double action foot pump for the sink rather than an electric pump. Less power draw, sea water for washing and rinse with fresh. Thought of doing the same here, but we carry 150 gallons of fresh with no off shore plans. If we were to venture out, would likely install a double action sea water foot pump at the gally sink with a valve to select between fresh and sea water.
I just redid our sole and had to open up the "fresh" water lines--- somewhat gross! Remember that the fresh water tanks have an air tube to a thru hull. The lines and water filter housing that sat empty for months were gross. I think that using a valve and running sea water thru the same fixtures as fresh wouldn't be my idea of totally sanitary. but I'm only now considering my fresh water tank as a light grey water tank and bringing gallons of bottled water.
Both our tanks remain clean and fresh. Alternate each as we use. Also use PUR brand galley sink faucet filter for our drinking water.
Of course.
Th phrase you want is recommissioning.
