For that setup in the pic do you have to unscrew it to get into it? Does that affect the cement or whatever they use to seal the pipe? Is it still possible to go at it from the top using the tool you mentioned if I were able to get at it?It wouldn't affect cleaning that much. We have an offset like this on our stove. I had to put it in when I switched from the Castine to the T6. The sooteater easily goes right through it without issue.