Mine at home is a 1 inch ID. You can use a hose, I think that a lot of systems are set up with a hose fitting from what I have seen.

What do you have setup for the discarge? I have a 1 inch female pipe thread coming off the discharge valve so I can you any set up.

This is only a guess but if you only have one waste tank, you are holding 98 percent water, so you'll have no problems with paper.