I had DE blowing back into the pool through the returns while vacuuming. I removed the tank lid to find the air relief screen clogged and crushed as well as a 6" crack in the manifold.

Ordered a new manifold and cleaned the grids.

After installing the new manifold, I was unable to replace the tank lid because the air tube was too tall and would hit the underside top. That may be how the previous manifold was damaged. I did not install the original. It came with the house.

I cut down the air tube so that it would fit.

Is this acceptable?