That means that if ABS and PVC are connected together, some type of adapter or fitting needs to be used. That's it, that's all that's allowed. The image below shows one such adapter on the right side.

Working with PVC, CPVC, or ABS pipes can be simple once you understand their differences, the right fittings, and proper adhesive use. Choosing the correct materials and avoiding common mistakes will ...

Average North American selling prices for polypropylene and PVC resins each have seen slight drops since April 1. Meanwhile, regional prices for engineering resins polycarbonate, ABS and nylon took ...