You can connect pvc or cpvc to copper in several ways.
Pvc trap to copper drain.
Using drain cleaners as a first choice.
Better yet if you can find one just use a brass copper trap adapter like the following.
Apply pipe dope and wicking to the existing iron male fitting then install a threaded pvc female adapter tightening it with pliers.
But too many diyers reach for the liquid drain cleaner first and they pour in way more than the recommended amount.
This isn t the best way though because you can t tighten the fitting if it leaks.
Here is a 1 1 2 plastic p trap.
Measure last piece of pvc pipe and cut it to size using a pvc cutter or hacksaw.
Cast iron pvc abs steel or copper drain lines can easily be connected to your sink p trap.
We offer many sizes of trap adapters to fit any type of trap and outlet drain piping you could possibly run into.
As water drains down the steep slope at the wye it can create a siphon effect such that water will be sucked out of the trap.
And the empty trap will allow sewer gas to flow into your home.
Or simply remove the p trap and pour out the clog.
I want to attach the sink s tailpipe to a pvc p trap and run pvc behind the wall down into the crawlspace where it will be joined to the existing 1 1 2 copper drainpipe that runs horizontally into the main soilstack a few feet away.
One common method is to solder a female threaded fitting onto the copper pipe screw in a male threaded plastic fitting and finish up by gluing plastic pipe to the plastic fitting.
Pvc sink drain to copper.
Connecting a trap to a vertical drain with a wye fitting and a 45 degree elbow seems like a good idea.
If you want to solder a better solution than using a compression ring on the wall side would be to sweat on a copper x female adapter followed by a male pvc adapter and a pvc trap adapter.
The easiest way to remove kitchen and bath sink clogs is to use a snake or a barbed drain cleaning tool.