First post, thanks in advance for any help you can provide on this issue.
I replaced my 9 yr old single-speed 2HP pump with a new Pentair VS 3HP pump (11018).
I've got it hooked up to a Zodiac (Jandy) iAqualink kit and everything is working great.
That is everything except when I run the spa mode, even at max speed (3450 setting), the spa doesn't bubble like it did before, and the pressure coming out of the jets is unimpressive. The outlet jet covers are spinning like crazy, but no bubbles.
if I put my hand over one of the jets, a few of the jets start to mimic the bubbling/jet action I expect, but still not anywhere near what it was.
A couple other points.
1) I rebuilt much of the 2" piping to locate the new pump and relocate my booster pump in the same area, the design is pretty close to the original but is different from before.
2) My filter is the Pentair clean & clear 420 (with four cartridges)
3) With my old pump the needle on my filter pressure gauge would always register "1" on the gauge (out of 5), with the new VS pump at full rpm the gauge bumps up to a reading of "2", and the pressure from the filter relief valve on top is like a fire hose. So the pressure is certainly there and greater at the filter than ever before. When I dial down the variable speed, the water pressure on the filter gauge drops accordingly.
4) Between the filter and the spa the line goes through an old check-valve that I did not replace during the reconfiguration (reused that portion of the pipe) then it goes through the heater unit.
Finally, with water pressure in the filter being so strong at full speed, my only thoughts are that the check-valve went bad, something is clogging the pipes, or the difference between the old and new pump somehow makes a difference on the bubbling effect.
Looking for input on how to troubleshoot this effectively.