I've got a 7 year old Gould well pump and a 35 yr. old well tank that I was instructed (when I moved into the house) by the previous owner to drain and re-pressurize the bladder with air twice a year. I've done such, but this past time was the first time I've run into a problem. After inflating the bladder to 38 psi. (pump shuts off at 58 lbs.) and refilling the tank, I'm getting air coming through the pipes when the pump turns on and starts to pressurize to 58lbs. The air usually starts coming through about 15 seconds after the pump turns on. I suspect the bladder might be bad, only because when I first drained the tank, I wasn't getting any water coming out of the air valve by the tank. The second time I drained it (once I realized there was a problem) and I shut off the supply line to the tank and unscrewed the cap to the air valve, I had water coming out of the valve. I also have a whole house filter installed by the tank and it should be pointed out, everything was working fine before I drained the tank today. Any help would be most appreciated.
Tony