Using fresh water is not a good idea. Fresh is precious enough without pumping it into the bay. If you try to anchor and it does not hold, you haul it up and have to hose it off. Move, anchor again, then hose again when you haul again. That's fresh water going to waste. It's no harder to get salt water than fresh water plumbed in. On a boat you should not waste water or electricity or ice. on my B323 i put a thruhull/valve in the cubby under a vee locker. A couple feet of hose to the pump under the vee.