My sprinkler pump was leaking so fixed the leak and now I can't get
the pump to suck the water from the well again. The pump works and I
can get the air tank to about 20 PSI by adding water through the prime
plug while the pump is working. At about 20 PSI the water starts
coming back through the prime plug and I have to close it. The air
pressure stays at 20 PSI and there is no water coming from the well.
How can I get the pump back to work again? Here is a picture of my
system: http://www.existonline.com/temp/sprinkler_pupmp.jpg

Thanks,
Jack