Hello, my well pump pressure keeps dropping causing well pump to kick on every 20 minutes. I have a shut off valve after pressure tank to house. When closed nothing changes. I just replaced the 2 line well pump thinking check valve was bad. I also installed an in line check valve be for well pump. Still same problem? I drained pressure tank to set air pressure to 28 psi. Tank was empty when drained. No water past the bladder.I had to reprime pump to get water flowing again. Still same problem?? Do I have a bad foot valve? Shouldn't the check valves stop the water from flowing back to well? Any help would be greatly appreciated.

I have a 95 foot deep 4 inch dia well. I don't really know what type it is, but the motor is above ground mounted to the bladder tank. Not sure if that is also the pump, or if there is a pump part of it submerged. Two pipes come from the well; a third goes from pump to house. The bladder tank and pressure gauge has been bad for years; previous owner installed a 2nd one in crawlspace which I was planning to replace shortly because the pump often ran longer than it should. The pump is at least 20 years old and due for replacement. If the pump is just that motor assembly mounted on the tank I can probably do that myself. I don't know what I'm doing but it looks straightforward, bolt off and bold onn. If there is something down in the well that went bad I'm in trouble, because I don't have the money to have someone come out and fart with that. I just returned from 3 months away. When I left I drained the pipes and blew out the pump and lines. Its an artesian well so I shut off the line that feeds the motor, sending all the water to the overflow line out in the swamp. When I came back Wednesday night I primed it and it fired right up. Have had no issues in the last 2 days. Tonight (Friday night) I suddenly had no water. Went to the well house and could hear the motor running. Unplugged it, primed it with 2 gallons of water, and fired it up. Same as before-motor sounds like its running but no water. For the night I shut off the artesian overflow in hopes I have a trickle of artesian water pressure by morning. If nothing else the pump/motor should be well primed. But I'm not sure what my next step is, other than getting the name/model of the pump/motor so y'all know what I've got here.