So what should I do? Call the company that installed the equipment at the beginning of the season and tell them they sold me a pump that was too big? Of course they're going to tell me I don't know what I'm talking about. I'm kind of in a bind here.

Oh and BTW, on the side of the pump it says it is 1.65HP.

If I go to a smaller pump will that give me less suction when I vacuum?