How to Connect HDPE Pipe to Copper

Written by lisa wampler
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HDPE plastic tubing is used for installing water lines in new homes. This material costs much less to manufacture than the copper used in old homes. However, if you have an older home you most likely have copper pipes. Just look under your kitchen sink and you will find out if you have copper pipes. If you need to couple HDPE plastic pipe with copper pipe -- you can easily do so with a rubber coupler.

Skill level:
Moderately Easy

Things you need

  • Mitre saw
  • 600-grit sandpaper
  • Rubber coupler
  • Phillip's screwdriver

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  1. 1

    Cut the copper pipe with a mitre saw. Remove the burr from the copper pipe with 600-grit sandpaper. You must have a flush cut on the end of the copper pipe that measures 90-degrees off the tubing wall.

  2. 2

    Slide the rubber coupler half way onto the copper pipe.

  3. 3

    Cut the HDPE pipe with a mitre saw and remove the burr. You must also have a flush cut on the end of the HDPE pipe that measures 90-degrees off the tubing wall.

  4. 4

    Slide the HDPE pipe into the rubber coupler until the end of the copper and HDPE pipe butt together.

  5. 5

    Tighten each cam-style band clamp with a Phillip's screwdriver.

  6. 6

    Turn on the water supply and check the rubber coupler for leaking. If you see any, tighten the clamps until the leaking stops.

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