About a week ago we had a deep well jet pump replaced with a submersible and replaced the pressure tank witha Well Xtrol wx202 20 gal tank. The new pump is a Wellsub brand 1/2 hp 220V pump in a 125' well at about 115'. How can we tell if the new tank is sized properly? I'm noticing that when we run our washing machine the pump will cycle on and off about 2-3 times until the washer is full. The tank is running at 30/50 psi and the pump cuts in at about 34psi. I'm just wondering if we got the wrong size tank. TIA