First question: What pressure will you be needing?
Second question: What's your freshwater washdown budget
? Do you have lots to spare?
I use a double pump unit for my saltwater washdown because I need to knock the mud off the chain and deck
in a hurry. I can then follow up with adjusting the nozzle to a gentler spray pattern to rinse the stuff over the side without spattering it all over the cabinside.
I plan on installing a valve to select from salt
to freshwater after I do the RO installation
. Then I can have the option I envision you are considering.