We had a heater installed and they switched out our skimmer and basket. I believe the skimmer is a Hayward SP1091WM, which is round, but the basket seems oval shaped. The installer wasn't prepared and I believe ran to a local store to get parts (long story). I'm wondering if this basket came with the skimmer, or if he bought it separate and it's not the correct one. It seems ok, but I 'm just curious. I was always told, round hole, round peg