How do you mean? My 150-SSS and 250-SSS both had a plug that I could drain off into a container.I definitely agree. I found the same to be true with the Reef Octopus 150-SSS that I have - it dialed in extremely quickly. The only down side (which doesn't matter for most) is that it doesn't come with a built-in drain for the skimmer cup.
I just found it not necessary.
I skim pretty dry though.