Yeah, low most of the time, high for backwash.

I can't tell you what to do, I can only tell you what I have. You have to make your choice of either spending money on new or waiting till THIS pump burns out as well in 2 years--and the betting is strong that it will.

But if it were me, and a matched set burned out 2 times in 5 years, well, I wouldn't have kept the same brand after the second burn-out.

I have a 20,000 gallon AG FantaSea, 40'x16' and I use a 200lb Hayward sand filter with a top-mounted multivalve. I mated that with a Hayward 1 hp 2 speed SuperPump (an IG pump) and have been running trouble-free for now 8 years. The SuperPump does require a 220v line.

My run to the return is ball-park 15', about on the same level as the multivalve, and my drains are my skimmer and low drain--skimmer's about 15' and low drain's about 8' from the pump--again about the same level.

There are other choices and certainly companies like Hayward and Jacuzzi and others make all-in-one filter and pump combos with matched sizes.