Myers HJ50D well pump

Long post. My mother still has a deep well that provides water to the outside faucets of her 50 year old home. One day she called me and said the pump which is in the basement was running for no reason. I told her to unplug it. She took it upon herself to call a plumber to look at it. He said the pump was shot. Not believing him, I took the pump to a very reputable repair shop an they went through it and said it was fine. I reinstalled it and after priming still no water. Problem must be in the well I thought. I pulled 57' of plastic line out of the well and thought I found the issue! The larger line totally came loose from the ejector. Simple. Not wanting to ever go back down that well again, I flushed the lines with water(from the neighbors),installed a new foot valve, and cleaned the ejector inside and out. Water flowed through all three holes. Reinstalled the lines and slowly primed the pump feeling positive I fixed it. No!! I primed the pump with a t-fitting in the large suction line and after pouring 20 + gallons I would place my hand over the spot where the cap should be and plugged it in. Nothing. Prime and repeat. Nothing. Instead of feeling suction on my hand from the large suction line I was getting pressure! I would take the palm of my hand away and water would shoot out the suction line. Strange. I put the cap on the t-fitting instead of the palm of my hand and the pressure was getting so much in the pump the new shaft seal started leaking!! All necessary valves were open and the pump sits on a big pressure tank that was empty. Why would the suction line develop pressure like that?? Finding a qualified pump repairman is very hard to find nowadays. Thank you for any help in this matter, Ryan

You can only "LIFT" water a max of 30 feet... Normally under 20 ft is good... If you are over that  you either use a submerged pump, or a "deep well" pump... Sounds like that is what you have ?... Should to TWO PLASTIC Lines going down to the foot valve, one larger than the other.. What you are doing is priming one line to the pump to get it started.. The pump then puts maybe 20% of the water BACK DOWN the other tube toward the check valve.. There is a venturi at the bottom that the PRESSURIZED water sprays thru and pulls additional water from the well and carries it up toward the pump which is helping to SUCK the water up...... water then exits the pump and again, maybe 80% goes to the house and 20% goes back DOWN THE PIPE to the venturi to help LIFT additional water............ so yes.. your suction line can feel like it has pressure inside.

Edited by steve(ill) - 03 Jan 2022 at 1:05pm

if your PUMP is good, then normally the venturi is worn out, or the NOZZLE is broke / gone.

the little white NOZZLE shoots into the lONG VENTURI... If you big pipe broke off, it might have broke the VENTURI off ?