I just "upgraded" from the Hayward single speed 1.5hp power-flo matrix to the 2-speed version of the same pump to save on energy costs by running it 24/7 on low. I have very similar psi output at high speed between the two pumps at 9 psi. Now what puzzles me is that at low speed my gauge is registering 0 psi.
I do feel water coming out of the return at low speed, but it is barely enough to make my skimmer wier gate work. It is pulling surface debris into the skimmer, but the pressure is not enough to pull the junk down into my skimmer net.
What psi should I expect from the low speed or is this just a gimmick pump that should really only be used on high? Does it seem broken at low speed?