Drag the red slider bars to set the initial height of the water in each tank.
Click the red valve to start the flow of water from one tank to the next.
Drag the pressure gauge into the water column to check the pressure at different heights in each tank.
Select the Flow tab (above) to see a graph of the water velocity. Select the Water Height tab to see a graph of the change in water height for each tank.
You may use keys w,a,s,d to move the pressure gauge.