Originally Posted by
Bruce Wrenn
Drain tank completely, then shut off valve to house. Next turn on pump, and let it pressurize the tank to cut off point. Turn off electricity, and wait 15 minutes, then check pressure. If it's fallen, you have a leak between pump and foot valve. If it hasn't fallen, then your leak is between pump and house.
Won't work if the foot valve/check valve is leaking and pump lost it's prime.
Won't work if there's a leak between pump and water level in well casing. The pump will suck air instead of water.
Confidence: The feeling you experience before you fully understand the situation