Good point.

There are two ways to fix that:

1. Install a valve between the pump and the filter, and throttle the flow on high to 45 GPM or less. (or just, to the point where sand no longer backwashes out of the filter!) Throttling like this will have almost no effect on the low speed flow.

2. Order and install the 3/4 HP impeller -- part number SPX2700C. This is the only part that would need to be changed. This change would deliver a 3/4HP 2 speed pump, with a slightly oversized motor, but the actual electrical consumption would be almost identical to a purpose built 3/4HP 2 speed (which Hayward doesn't make). The motor might even last longer, since it would have less tendency to overheat.


Parts guide: https://www.hayward-pool.com/pdf/Par...Max-Flo-XL.pdf