I bought a new o-ring and puberty it this worked for awhile but I started getting this small whirlpool at my outlet also when I turn off pump I get a gurgling sound and an explosion of air out of outlet. My pool supplier said my pump lid top maybe warped also.any ideas
Did you lube the lid o-ring well? If not, you should do that first.
If that doesn't fix it you should check the skimmer to see if it's creating a vortex and make sure the weir is working freely. Also check and reseal the drain plugs on the pump.