Hi all...I've got a pressure tank that's got me a little concerned. All seems to be working properly except when the pressure switch comes on it fills the tank normally until it reaches about 40 lbs. then it shoots right up to about 55 lbs. shuts off the pump and then the gauge quickly drops back to about 40 lbs. I wouldn't say it is short cycling but I don't think it is filling the tank like it should. I'll do a check but I would say it's not giving more than 4 or 5 gallons of water before it kicks the pump back on. This is I believe a 30 gallon tank and is not more than 5 years old. Any thoughts on what might be causing this? Thanks Dan