What determines the use of a vertical or horizontal well pump? If you have a vertical, how do you convert to a horizontal? I just purchased a house with a well and the well pump (vertical) runs but no water. Tried priming nothing, going to pull line to check foot valve b4 disassembling pump it is a Sta-rite MSE-7, is this a shallow well? Been long time since I worked on pumps. It has a small tank guess 30 gallons believe bladder type has a valve on top, do I need to put air in tank, 0 pressure now, if so what is psi. Info appreciated.