How to Join a PVC Pipe to a Copper Pipe

When connecting PVC and copper pipes together, there is always a possibility of creating weaknesses. You must take the necessary precautions to make sure the stability of your pipes remains in tact. To save money, you can use the more expensive brass pipes for most of your plumbing, but then use cheaper PVC pieces as you update.

Step 1 - Turn Off the Water

Make sure that the water is shut off at the main supply valve or at the in-line valve connected to the pipes you are working on. Turn on the faucets to allow all of the water to flow out.

Step 2 - Prepare the Pipe

Use a rag to thoroughly dry the copper pipe both inside and out. Then use the emery cloth to get rid of the top layer of copper to provide a better bond. You must make sure that the cut copper pipe is as smooth as possible. The pipe should be shiny for two inches from the cut end of the pipe.

Step 3 - Prepare the Copper Adapter

Use the emery cloth to sand the inside of the copper male adapter. Once you have finished this, the inside of the connector should be completely shiny.

Step 4 - Apply Flux

Apply flux by brushing it around the copper pipe and inside the copper male adapter. Make sure that all of the surface is coated properly to provide a good bond.

Step 5 - Fix the Copper Pipe and Connector

Fit together the copper pipe and connector. Slide the slip end down over the copper pipe until it won't go any further. Then twist it around so that all of the flux is distributed evenly.

Step 6 - Solder

The propane torch needs to be used to heat up the slip joint, when the flux has reached its melting point solder can be applied to the joint. This solder should melt and will collect in the joints. Ensure that all of the joints are sealed properly.

Now wait until the copper pipe has cooled down and then wrap the threaded section in Plumbers tape.

Step 7 - Add PVC Adapter

Screw the PVC female adapter onto the copper male thread. Tighten it by hand until you can't turn it any more, and then finish the job with a pipe wrench.

Step 8 - Connecting the PVC Pipe

The PVC pipe and adaptor need to be primed by using Purple Primer. Then cement can be applied all around the joint so that the two bond together properly. Once you have coated the pipe and connector with cement slide the pipe down as far as it will possibly go.