The hand water pump in my '66 Shasta Compact was not working correctly (I think maybe it had been frozen one too many times in the cold of Northern Minnesota winter storage) so I replaced this system with a 12 Volt Flo-Jet RV water pump. This type of pump only runs when there is "demand," that is when the tap is turned on. You will need to install a power switch to turn the pump off when the tank is empty or when traveling. I installed my switch directly under the sink so it is easy to operate when you are standing at the sink. I removed the hand-pump assembly and replaced with a drinking water tap that I purchased at a home improvement store. This particular tap had an adjustable water control -- just like one at home so you can run a little bit of water to wash finger tips or create a deluge by twisting the handle. This arrangement made the old drain under the trailer unnecessary as the pump does a good job pulling all of the water out of the tank - something I do every time I break camp and prepare to get on the road. Flo-Jet provides a set of quick disconnects to make winterization easier too. I love this new arrangement and enjoy the ability to pump gallons of water easily when I need it. The pump connects to the 12 volt system. See my post in that section for the solution I came up with to provide 12 volt power. Let me know if you have questions or need tips on either!