I am a new pool owner and have been getting air in the filter basket. I replaced the lid gasket and I am still having the same issue. I have checked the plastic drain plugs on the front and side of the the filter basket, they seem ok. I replaced the rubber washer and used that pool lubricant on the threads, and I hope this isn't a really stupid question but the drain plugs never really seat, they just seem to keep spinning when I tighten them, is that normal or a problem?
When the water is returned to the pool there are air bubbles in the return. It is not a constant stream but seems to alternate between clear and then air bubbles in a cycle.
My last question is sand in the pool a red flag or is that normal?