NDS 4 in. drain, waste and vent (DWV) pipe to 4 in. The old one used an s tube going straight down into the floor and now I want to install a p tube into the wall and then down into the crawl space below. Since it is not pressurized, I figured it would work as long as I … Mark the position of the end of the adapter onto the PVC with a felt-tipped pen. Connecting a plastic pipe to a metal pipe using a threaded connection is possible as long as you are connecting a plastic male thread to a metal female thread. Any ideas how to stop this leak? Connecting 2in copper drain pipe to PVC drain. Is there a sealer that will create a waterproof connection when fitting the PVC drain over the copper pipe, or an internal seal available? The tried and true method for connecting copper pipes has always been soldering, but it’s a difficult skill to master. PVC sink drain to copper? I'm trying to rehook up the kitchen sink pvc trap to the old copper drain pipe but the connector doesn't fit tight enough and the water links out. Insert the end of the PVC pipe into the PVC end of the PVC-to-copper adapter as far as it will go. Delta Metal Kitchen Air Gap. Author: GWP (PA) I am installing a new sink cabinet and sink in my kitchen. The inside of galvanized pipes gets thinner over the years. There is NO access to the subfloor, so creating a male copper to female PVC connection is not possible without major deconstruction. Typically, these come in two parts, often sold separately. sewage and drainage (S and D) pipe in the installation of non-pressurized drainage and sewer piping systems. 3. Is there any way to connect a 2" PVC shower drain to a 2" copper drain pipe? PVC DWV to Sewer and Drain Adapter is designed to connect 4 in. A variety of threaded fittings are available in the options listed below for connecting PEX pipe to copper or PVC pipes. Richard Trethewey shows another effective way to connect these pipes … After suffering 3 different leaks on my 2 inch copper drain pipes, I decided to replace it with PVC. I’m replacing my shower and I would like to join the new shower’s PVC drain pipe (2” nominal) to my copper drain pipe that is already in the floor (2” nominal dwv). goes into the 1 1/2 inch copper drain pipe, can I hacksaw it off, back far enough on the drain pipe to make sure I get all the tail piece, and join a 1 1/2 inch pvc tail piece to the 1 1/2 copper using a fernco adapter? My hope is that I can replace everything up to the 4 inch copper stack, but am not sure the best place to join PVC and copper. Each leak was at a joint, and I patch it last year, but took the dive and removed my downstairs ceiling for access. Connecting to 1 1/2" copper drain with pvc kitchen sink drain trap. One inexpensive method of connecting ABS to PVC drainpipes is to use male and female fittings. 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