Some of you guys have some great ideas so let see who has an idea for this. I have a toliet system on my boat and my marina does not have a pump out station. WE only want to use it for liquids...no pooping..lol. SO my idea is to make some type of make shift pump so i can pump the gray water into a container and take it to my local rv place on my way home. Any ideas on what to use? The boat is a 28 foot rinker 260vee, 1993 model. I was thinking maybe an areator(spelling?) pump used for fishing with a garden hose on both sides and just hook it up to a battery.