I don't know about others but when ever we pull a pump we always replace the pipping as well, even if we are re-using the same old pump.
You may have breaks underground on the run from the well to the house. If you can isolate the house, use an air compressor to add water up to the piping going into the pitiless adapter the idea is to try to pressurize the line between well and house you may find you have leaks.
If you do have leaks my suggestion is to replace the whole line. I have a customer right now that has 50 psi at his well, pressure tank, and at one lawn hydrant. But some where in-between the pressure tank and his house there is leaks, he gets 15-20 psi at the hose bib just before the house.
Last edited by chukar; 10-29-2013 at 06:05 AM.