Step 6: Testing the Pump
Since the check valves are threaded, they can be moved around, changed out, or positioned in many creative ways.
Using additional PVC pipe and fittings opens up many different options. The imagination is the limitation.
You could try making this into a pump to move water vertically, or leverage it with your feet for more of a bilge pump type approach.
This pump seemed to move just over 2 cups of water per cycle.
With the vertical pump approach, I could pump around 3 gallons per minute.
With the horizontal approach, I could move over 5 gallons per minute because I could put my weight into it and move it faster.