Well pressure tanks
The Washington State Department of Health describes a bladder pressure tank as air and water separated by a flexible membrane, precharged with air at the factory.
The pressure tank
Washington State Department of Health says a bladder pressure tank lasts 5 to 7 years on average.
Washington State Department of Health says a tank is waterlogged when the bladder fails and water fills the air space; such tanks should be replaced.
Washington State Department of Health lists water spitting out when you press the air valve pin, rapid pump cycling, and rusty water as signs of a waterlogged tank.
Washington State Department of Health says that with the tank drained, the air charge should be 2 psi below the pump's start pressure.
Washington State Department of Health gives 30 to 50 psi and 40 to 60 psi as common pump on and off pressure ranges.
Nebraska Extension explains that in older galvanized tanks the water absorbs air, which must be replaced or the tank waterlogs and the pump starts almost every time water is used.
Nebraska Extension says bladder tanks come precharged to about 20 psi, and the charge can be raised through the air valve near the top.
Common questions
How does a well pressure tank work?
The Washington State Department of Health describes a bladder pressure tank as air and water separated by a flexible membrane, precharged with air at the factory.