Thanks for the suggestions guys. Joel I don't know if you remember this tank or not, but I don't think I will be able to fit a durso style standpipe inside of the overflow. What I did have in mind after everyone's input is a 1" T fitting right off the bulkhead with a standpipe going up with a cap to let the air escape. As for the downward send, I will have the drain T off into two 1" pipes with valves, one to the fuge, and one to the skimmer section. Have I forgotten anything? I am using a 20 long that I made into a sump. I have the skimmer in the first chamber, the return pump in the center chamber, with the fuge in the final chamber. Let me know what everybody thinks. I do appreciate the feedback.