Had problems w/my pump cycling. I have a galvanized tank hooked to a bladder tank. I drained gal. tank. same problem. Then checked air in bladder it was 22lbs. charged to 28 (switch set to 30/50.) Pump no longer short cycles but now it will run every so often w/out running any water. Pressure switch and bladder tank about 5 yrs old. Could the pressure switch be leaking? thanks for any help, site has been very helpful already!