I'm getting a few bubbles in my basket when filter gauge is at 14lbs. They reduce greatly if return valve is fully open and pressure drops to 10 or so,but I need more than that to run cleaner. I've checked my liquidator hook ups by unhooking ball gauge,replacing control valve,and covering hookups at the liquidator itself and at the pump drain inlet. There is no water at all on my pad. Replaced the gasket in the basket lid,re-lubed lightly(maybe I need to be generous with the lube),but after this the blasted little bubbles keep appearing.They appear to come up from the union of the lid and the basket body. I'm thinking maybe a hairline crack in my lid that I'm not seeing. Does anybody know of a way to check it without buying a new lid?? Just hate to buy a new lid if it isn't needed.

Check the drain plugs on the strainer body.

As for leak detection, get a garden hose and dribble water over the areas you think might leak. If the bubbles disappear, it means it's sucking water instead of air, and you know where to narrow the search.