"EXT" wrote in message
anews.com...
Air leaked out of tank: bad fill valve. OR Leak in bladder: water filled
the air half of the tank behind the bladder.

So how does one test for this? The tank, when the pump has cycled to it's
normal 60 lbs high point, has 36 lbs of pressure at the air valve. I've
read a little about this and apparently it should read 4 lbs less than the
low kick in win no water. Does the 36 lbs translate to anything non drained
and fully preasurized?