TerryT

Possibly the pics HEIC format made it unavailable. I uploaded again as JPG.

I have a Chemtrol control system which utilizes 2 probes. The unit holding the probes will not properly bleed the air out. I attached a picture. I assume the tube in the top is designed to bleed off the air but that is not happening. I think it has to do with pressure differences as the water flows through the unit. If I close the exit valve and shake the unit the air leaves but eventually comes back. If I open the bottom tube while water is flowing through it pulls in air. If I close the exit valve it will then push water out the bottom tube but not air. AirLock.HEIC