Hello,

We have an 11 year old gunite pool with in-line hayward chlorinator. I noticed air bubbles continuously coming out of the 2 returns closest to the pump. There is no air in pump or filter while pool is running.

I thought the chlorinator was making an odd sound. There is no water leaking from it. When I leave dial on full, the bubbles coming out of the returns are small. When I turn chlorinator dial to off, after about 30 sec, bubbles are larger and more frequent. Of note, the cover for chlorinator seems a little more difficult to turn that last turn until it clicks.
I put some silicone pool lubricant on threads but it still does not turn as easily the last revolution.

Does this seem like it is our problem? Thanks.
Dave