Quote Originally Posted by NTL1991 View Post
Sorry, for some reason I was thinking the motor was what would change the flow rate, but now I understand its not the motor but the impeller design. I'd have to swap the whole pump assembly including the motor.
Actually, if you are handy, all you have to do is change the impeller and the seal, and MAYBE the diffuser. You do NOT have to change the motor. You can run a big motor with a small impeller, and get almost the same electrical efficiency you would with a smaller motor. (Big impeller + small motor = SMOKE & FIRE!)