Oh, yea....forgot about that. Yes, turn the water off and let off the pressure inside by just opening one of the faucets - I usually use the bathroom since it's the furthest away from the connection - and you're set. Also....if you have water in your FW, sitting in the heat and sun is going to make it really nasty, really fast. Suggest you empty that to begin with. We almost never use our FW, but did on 1 trip and totally forgot about it. We started getting this really awful odor and couldn't find it until I went to put chemicals in the black tank and used the FW to add. ICK! There was the smell. We had to sanitize and start all over.