When we replaced the suction line, we also added a Tee and a ball valve so we could flood the suction line on the well side of the check valve. Do you think that ball valve, even though closed, could be letting air into the pump?

It could be several things.
1/ The check valve could have some dirt in the flapper allowing water to seep out over night.
2. Could be a leak in the suction line and you're sucking air **OR**
3. The water table has fallen and the points sucking air until it builds up again.
Is this a new problem or has it just started up? Back to you. BTom

Reseal your pipe joints and install a footvalve. If you suspect the new valve could be a problem, then try removing it and see if the problem clears up. I don't think the water table is the problem since you are, as I understand it, still getting water, just mixed with air. If the water table dropped, I would think you'd lose prime and wouldn't get anything.

We resealed all the pipe joints with teflon tape when we installed the new suction line and the new check valve. My well is a single line well and does not have a foot valve. I'm not losing the prime at all. I'm just getting little air pockets when I open a faucet upstairs or when I run the washer or when I run the hose outside. It clears up after you run the water for a minute or two but then later it starts spurting air again. I read online somewhere that I needed to flush my holding tank and I did that this morning. Seems to be better but still a little air.

Do you have any idea how far down the well it is to water? It does sound like it might be sucking at least some air.

I don't see why a pressure tank would need to be flushed in the sense of somehow removing air. Your bladder tank should be all air above the bladder, and all water below the bladder. If there is air below the bladder, and you are confident your wellpipe is properly sealed, then it would have to be sucking air in the well.

Do you mean a tee and ball valve similar to this?Attachment 37429

Just curious as to why you would want to flood the wellpipe below the CV if there is no footvalve. Just asking.

I realize you don't have a foot valve. That is why I am saying you should add one. Won't hurt a thing, and may fix your problem. Definitely worth a shot. They really aren't that expensive or hard to install.

Now, you say holding tank. Do you mean pressure tank? Can you post a pic of the "holding tank"?