Dave.. I'm hoping I can piggy back on this thread to ask a question as I don't have a link to start my own thread on the homepage. Long story short, I have a Hayward CE 75 de filter with filter fingers. It is not building up pressure when I vac and dirt is shooting back into the pool on start up.. I've replace the diaphragm the top plate and a few suspect fingers in the filter.. Other than the bottom plate could there be anything else causing it..? The suction and return rate are working great.. Just doesn't seem to be filtering.