I do 1" PVC from the pan and 3/4 copper from the discharge to the exterior terminated between 6 & 24" above the grade. I don't know whatthe distance req's for the pan drain is. There may not be a tee - a valve of any kind and the ID may not get reduced. I also seem to remember that there may not be threads at the termination point of the relief line. OH..OH, the discharge line may not be located in an area where damage can occur should the valve release!
"It's now. You just go for it now and you worry about the future and the past later." -Steve Nash
And when I leave come together like butt cheeks
-Grits n Gravy