I think the jet nozzle at the bottom of the well is clogged with the same stuff you see in the faucets. Max of 25 PSI makes me think the jet is plugged. Won't do any good to replace the pump if the jet is plugged. I would consider going back with a submersible because it won't have those kind of problems. Use 160# poly in the well with long barb fittings and at least two hose clamps each.