Well I was reading the label on the filter and was surprised to see in the instructions that "rinse" should be done after backwashing! No one ever told me to do that with a DE filter. I thought it was only for sand filters. Does the 'rinse water' go back into the pool or out the waste line? I never even noticed that the multiport had a rinse position at all. Gee, I thought I was paying attention....
Hal