Yeah, that didn’t seem right... the main C9 pump being directly associated with the primary filter. My filter doesn’t appear to be that way, so I was scratching my head when you said that, but then I’m a relative novice on the subject. I do remember, however, discussions of Dave’s suggestion to add the boost pump.
My rig has never had the associated issue, and my shorter coach I think positions the tank closer to the pump system than others that may experience inadequate pressures. If I ever manage to get to Dave’s Arizona facility I figured on having him analyze our whole configuration, and implement his advice accordingly.
Joel