If you want to connect a metal hot water pipe (such as iron or copper) to a PVC pipe, you will need to use a transition coupler to make the connection. A transition coupler is a special connector fitting that is made out of two different types of materials. Using a transition coupler is not that difficult, and this simple how-to guide will show you everything you need to know.
For Connecting to Metal Pipes with No Threads
Step 1 - Clean Ends of Pipes
Use a piece of sandpaper and clean the edges of the PVC and metal pipes.
Step 2 - Install Clamp On Transition Couple
Slide the clamp on transition coupler fitting onto both the PVC pipe and piece of metal pipe that you will be connecting. Then, take a screwdriver and tighten the screws on the clamps that are used to create the compression seal.
When Connecting to Metal Pipe with Threaded End
Step 1 - Clean Pipe Ends
Use a piece of sandpaper to clean the end of the PVC pipe, and the wire brush to clean the threaded end of the metal pipe.
Step 2 - Install Coupler on PVC Pipe
Apply PVC primer to the inside of the PVC side of the coupler and also the outer edge of the PVC pipe. Then, use PVC glue to connect the coupler fitting to the piece of PVC pipe.
Step 3 - Connect Coupler to Metal Pipe
Wrap Teflon tape on the threaded end of the metal pipe. Then, take the compression nut and spin it onto the threaded end of the metal pipe. Once the nut is hand-tight, take the adjustable wrench and turn it in an additional 1/2 turn.