When running in "normal" mode, the filter says about 8PSI In Cleaner mode, ~16PSI. I have no idea about GPM... I think I found that once in the remote, but can't find it again. I want to say regular mode is about 30GPM and Cleaner ~60GPM One of the jets has always been strong. The rest have always been weaker. I cannot tell any difference in the others... they all seem to work about how the used to.