I've got freshwater-plumbed Vacuflush systems on the current boat, which work great. However, on my previous boat we had a standard Jabsco pump head plumbed to salt water. Odors weren't really a problem unless we left the boat for a few days or more. That was easy to solve by filling the bowl with fresh water from the shower/faucet fixture and pumping dry before leaving the boat for any length of time.Thanks for the replies all! Don't want to get sick, so won't hook the house water to anything in the head. Will hook up existing raw water rinse and give it a shot. Worst case scenario is to pour a glass of fresh water into the bowl and flush.