Remco Aquajet RV 5.3 gpm pump

[hrdestiny]

I just installed the above pump. It works great with very good pressure to all fixtures. The only thing I have noticed is when I shut fixture off the pump will shut off then immediately do 3 or 4 very short pulses. I'm just trying to see if this is a normal thing with a variable speed pump. Any ideas?

[Twomed]

Mine (same pump) does that with really cold water (Yellowstone) but not back here in FLA with warmer water. Have tried adjustments...no joy, nature of the beast.