This can be a problem when joining cpvc to copper especially when using threaded connections.
Copper to cpvc compression fitting.
My experience with cpvc is not good in fact i hate any plastic pipe to include pex.
Lead free copper and cpvc cts silicon alloy slip x soldier transition union 3.
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.
Warning avoid eating smoking or any other hand to mouth contact while soldering copper or using cpvc solvent and glue.
Bevel the edges of the pipe with a file.
Plastic and metal expand and contract at different rates.
Scrape away any burrs from the copper pipe and rub a drop of dishwashing liquid on each end of the copper to act as a lubricant.
One option is to use union adapters.
Sharkbite pvc fitting uip4008a inch x inch cts pvc connector to copper pex cpvc hdpe or pe rt for potable water 4 8 out of 5 stars 97 12 54 12.
The rubber washer should flex enough to keep the connection sealed.
Wrot copper cup x fipt adapter fitting.
Cut the cpvc pipe at the point where you want to install the compression fitting with a tubing cutter to produce a clean square cut.
Cpvc lead free slip x copper alloy compression union 1 model c4733 7 lf.
Here s a video on how to change back to copper no matter the make up i.
Slip the compression nut from the compression fitting onto the pipe then slip on the compression ring.
Fit the compression fitting onto the pipe or fit the pipe into the fitting as applicable until the pipe stops inside the fitting.
Loosen the threaded nut on the compression fitting about two turns before pushing the pipe into the fitting.
You can connect pvc or cpvc to copper in several ways.
Push on a cpvc compression fitting.
Cpvc compression fittings are also available for in line connections when adding a new service to an existing line.
