Help wanted or new ideas appreciated. I live in s.e. Texas and my well is 20 years old. I have a well with a submersable pump 3-500' deep, high pressure release valve at well head outside, bladder tank, check valve, pressure switch and gauge in garage. The problem with air in system started about a year ago and I have tried to troubleshoot and suspect the next step is to pull the wells down pipe up to see if it has a check valve and if it is defective. The strange thing about this air in system is that the amout of air greatly increases after it rains? The air will be mixed with water as it come out of the faucets and the goes away for a few seconds and may return several times as the well turns on. The original set up has a galvanized gravity holding tank with a schreader valve before the check valve. The holding tank devolped a leak and I replaced it with the bladder tank and all was working normal without any air. Years later the air started. I first replaced pressure release valve and the core in the schreader valve due to a water leak and it was ok for a few months then I capped off the schreader valve thinking it was drawing air in past the schreader valve. Found out that the blader tank did not need the schreader valve and that was probably my problem. We have had some dry weather and the air problem was 90% better then after it rained the problem is back. I then replaced the check valve, pressure gauge, pressure switch and eliminated the schreader valve and thought it was back to 90-100% better but again the air is still there. Now I think I need to somehow leak test from the check valve to the down pipe? The gauge does not indicate any leaks as far as pressure loss and the well water is clean except when the air is mixed in it gets cloudy when put in a glass it will turn clear after awhile. Sorry for the long post as I am not a plumber.