I built a pool this spring with a Jandy 2 speed pump. It is a big pump -- 2.5 HP and at high speed it would shoot water 20-25 feet in the air out the fountain if you directed all the flow there. If you did the same on low speed, it would go up about a foot. (Obviously this is not how I normally use the pump, but it somewhat of a basis for measurement for comparison).

My understanding is that low speed drives the pump at half power. Is it correct to expect that you would get roughly half the water coming out (or a little more, because your flow resistance would be lower)?

Thanks-

Jason