I added the bottom plate that uses the rubber suctions cups. The bottom plate doesn't seal well as the pump keeps it from doing that. Page 65 of the instruction manual does not list a coupler, is there another name for it?
I used parts number 12,13,8,11 and 15, to set it up for use in the sump. 24 hours later and there is still nothing coming out the overflow pipe of the skimmer.