How to Convert PEX to PVC


Both PEX (cross-linked polyethylene) and PVC (most areas coded for CPVC, standing for chlorinated polyvinyl chloride) are water supply pipes used in homes. When joining these two pipes together in the same water line, the connecting joint used to make the transition is created by a company called SharkBite. The fitting has an interior release collar and stainless steel grab ring with small teeth, as well as an O-ring protector to align the tube. The O-ring also creates a seal between the fitting and pipe end, when the pipe is pushed into the fitting.

Things You'll Need

  • Tube cutter
  • Fine sandpaper
  • SharkBite depth gauge
  • Fine-point pen
  • SharkBite fitting
  • Position the PEX pipe and PVC/CPVC pipe one at a time in the jaws of a tube cutter, at the point where both pipes need to be cut and attached to each other -- be sure that the jaws of the cutter are at 90 degrees to the pipe. Close the cutter's handles together to cut cleanly through the pipe. Inspect the cut ends of both pipes: If any burrs or plastic fragments exist, roll up a sheet of fine sandpaper and sand around both the inside and outside ends of the pipes by holding the sandpaper at a 45- degree angle to each pipe. Continue sanding until all fragments are removed and the pipe ends are smooth.

  • Insert each pipe end into a SharkBite depth gauge and, using a fine-point pen, mark each pipe at the point where the end of the depth gauge meets the side of the pipe -- this mark will help ensure that the pipe ends are pushed correctly into the fitting, i.e., to the depth of the mark.

  • Insert one pipe end into the inlet on one side of the SharkBite fitting -- the end will meet slight resistance when it meets the grab ring inside the fitting. Push and slightly twist the pipe end by hand until it meets the tube stop inside the fitting and can't be pushed anymore. Check the mark on the side of the pipe to make sure it is within 0.05 inch (1.3 millimeters) of the end of the fitting. Repeat this fitting process with the other pipe end and the inlet on the other end of the fitting.

Tips & Warnings

  • Make sure the SharkBite fitting is the same diameter as the two pipes being joined together.

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  • Photo Credit Thinkstock/Comstock/Getty Images
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