the grip-style mechanical fittings (Photos 3 and 4) can be used on both copper and CPVC pipe. Don't confuse CPVC pipe with the plastic polybutylene systems that were a problem more than a decade ago.

PVC and CPVC, PEX, ABS, galvanized steel and cast iron — can mostly all be connected to each other with appropriate fittings. With all the different pipe sizes and materials out there ...

PVC pipe is a valuable material to the backyard ... The possibilities could be further expanded by combining with these PVC fittings designed just for building stuff.