Peggy,After our conversation a while back about the Wilcox-Crittenden head on our C400, we purchased a Sea Era II ( the larger household size) and I installed it. We love the toilet and since it is the pressurized fresh water model, no more smells. When I installed it, I T'd the fresh water from the sink cold line, and added a shutoff valve before the solenoid that opens when you flush. My question: to save water during sailing and possible spillage when well heeled over, I close the shutoff valve and flush the mellowed yellow to keep the bowl dry as possible and upon either the brown flush it down and/or anchored/docked, open the shutoff to allow fresh water to flush the bowl.Am I setting myself up for problems with e.coli by doing this? Should I always flush with fresh water or can I keep using the method I discribed?Thanks once again for your recommendation on the SEII. Gary