What would cause air and sputtering in water lines?

Well, my problem is fixed. I had a Culligan Super S whole house filter installed yesterday. The problem is now gone. I can't figure out why this cured the problem other than adding a little bit of restriction immediately after the water tank. This would be easy to duplicate. Just close the valve after the tank a little and see if this cures the problem. A failed air volume control valve located at the pressure tank could allow air to escape from the tank and into the water system. The valve may not be bleeding off extra air in the tank. Turn off the power to the well pump and turn on a faucet until all the water and air is gone. Turn off the faucet and turn the power on for the well. If this solves the problem for short time(a week or two)then replace the valve.