Jon,

This happens when the pump has been off for a period of time. Once I purge the air it doesn't happen again until the pump has been off for a relatively long period of time. It also doesn't happen every time. I am supposing that it is air in the lines and that the pump is having a tough time getting to a steady pressure to shut off. I actually don't really know that air is the culprit, but when I open the fawcets their seems to be some discharge of air. As long as I can get the pump to stop running and I don't have water leaks I really am not concerned about it.

Go pick on JDUB.