Hello all and welcome to another season.

My pump runs for about 6 hours in the morning and then shuts off. When it first kicks on in the morning there is a lot of air in the system creating big bubbles of air from the returns in the pool. It bubbles for about 10 seconds and then clears up.

Items i have done to try to eliminate the large amount of air:
-- Replaced the pressure relief valve on top of the filter
-- Cleaned and lube o-ring on chlorine generator and the pump basket
-- Replaced the 0-rings in the back wash valve.

I'm assuming I have a leak somewhere but am at a loss on where else to look. I don't see any water on the ground that would indicate a leak. It appears to me that the filter is where the issue is as the pump basket and chlorine generator housing are full in the morning.

One thing to note is that this began just after a complete tear down and cleaning of the filter grids (DE filter). If the o-ring on the filter was not seating I would assume i would see water running down the filter as air was being introduced.

Any advice is greatly appreciated.