Thanks, the difference in power was not stated, jut the difference in part number. I have a large solar heater field, plus pool is 24K gallons approx, and looking at adding a supplemental heat pump, so that is why I was thinking of the larger horsepower. My current supposed 1.5 hp Doughboy power pak II is just barely squeaking by when the solar is on, and I cannot use my suction side cleaner and solar at the same time- not enough power.
Looking at Pentair Optiflo as well. Do you think it is better to order and save money, or go to a local-ish store so that warranty repairs do not require shipping?
Also, any significant difference between Pentair Optiflo and Dynamo? I think our local-ish store offers the Dynamo, but the clerk was not good with part numbers. Going to have to go there and figure out for myself.