I am trying to figure out why I am not getting enough pressure to my Polaris Quattro to maintain 28RPM and noticed that when the cleaner valve turns on it only opens half way, I assume so water continues to flow to the other return lines. Was thinking of opening the valve all the way, but not sure if that would cause any problems. Is it normal for the cleaner and other return lines to both be open? I do have a booster pump so maybe that could be the issue also.