Title says a lot, but I'm trying to determine if I have a suction-side air leak that's causing the air in the basket, or if the leaks on the filter side are causing air to get into the filter.
I checked yesterday (Sunday) morning and the pump had about 4-5 inches of air that wouldn't go away. The water level was below the top of the intake to the pump. Flow at the returns was very low. So I backwashed the filter and during that process the pump basket filled completely with water. Ran the filter for most of the day/evening on Sunday and the water level didn't drop dramatically in the basket.
Pump was off for about 10 hours and this morning, after the pump had been on for an hour or so, i noticed there was a bit more air than the day before - about an inch of air. Is it possible that the leaky pressure valve in the filter, or the leaky crack in the bottom of the filter caused air to get into the basket? Or does an increasing amount of air in the basket seem to indicate a suction-side leak?
Here is a brief video of the pump basket.
Additionally, there was sand at the bottom of the pool, and after brushing it to the main rains, it ended up coming back out of the returns. Not sure this is relevant, but thought worth mentioning.