Discussion of this guys chamber and fittings rating ends here.
Chances are the bell reducer is DWV, which means it's not meant for pressure and could possibly fail. It is up to you if you want to change it or not. I'd recommend it. Then again it could be pressure rated, to check read this topic:
http://www.spudfiles.com/spud_wiki/inde ... _Rated_PVC
You guys spent a page and a half bickering about this, pointless. Just comment on the guys cannon from now on.
stevenarroyo,
If a pipe has a higher rating then another, no matter the size or material, always go with the higher rating if you can. Unless you're not going to be going close to the rating and the other pipe is a better option...Well there are many factors, but thickness isn't everything.
If it's been rated to an American plumbing standard for pressure, it should be good.