[Canadian Man]

OK here it goes;
Most people will tell you pvc is the only thing you want to use, which MAY be true. Reason being- it's potable(safe for drinking water).
ABS almost all people will tell you not to use it because it's not potable.
I have heard that there is two kinds of ABS out there. One is treated in a type of anti mould kinda treatment and one is not.

So weather you use ABS in your plumbing setup or not is a shot in the dark. There are a few people on this board that have some part of their plumbing setup with ABS and they apparently didn't have any problems.

ABS and PVC do have their own types of glue and there is also glues to go from ABS TO PVC. Either way the proper glue is what you want to use and also it is recomended to use primer on the joints. You don't have to let the glue dry for a long time as well. For most of my plumbing projects 5 to 10 minutes is all I give it and flick the switch.

As far as silicone goes you want to use a silicone with no anti mildue or anti mould ingrediants. Dont use silicone on your PVC joints only glass.

Hope my babbling helps