I create unique urinals and like to have them flush while on they are on display. In the past I have used a garden hose connected to a water source, a collection bucket and a sump pump that takes the water out of the display - usually into a garden or drain. I don't always have a water source or a place to drain it. I am wondering if there is a clever way to make a self contained system that would allow me to keep water in a pressurized tank with enough pressure for a flush valve then recirculate the water back into the tank so I could have pressure to the flush valves and reuse the water continuously. Is this possible? Thanks