When I was back in MD water pressure was an acceptable 60-65PSI. Here in Jersey it dropped to a paltry 40-45PSI. My 150gpd RODI went from about 120 gpd to a sad 50gpd and I did nothing about it until last week when I ordered an aquatec 8800. It came in yesterday and now I am almost at a full 150gpd. How did I manage to avoid doing this from the first time I hooked up the RODI and saw that pressure gauge? Put your money on sheer lazyness.