Compression Fitting

A compression fitting is a part of piping that helps connect two pieces together without allowing any air or water so escape. The most common in copper piping that is protruded outside of a wall. A compression fitting is easy to install and allows the piping to be re-designed if the owner needs it facing a different direction in future years.

  • Step 1: Turn off the water source to the piping.
  • Step 2: Put the nut around the pipe and follow with the compression ring.
  • Step 3: Screw on the nut as tight as you can and then finish it off with a wrench.
  • Step 4: Turn the water on and check for leaks.

The compression fitting has a seal that encloses the pipe when it is tightened. Do not try to use joint compound or tape to help seal the piping because it will actually weaken the seal over time.

Compression Fitting Installation Tips

If you are replacing a compression fitting, or working with piping that is currently in use you may want to use a pail to gather water. Even after a water source is shut off, some water will still be settled somewhere in the piping and may come out as soon as you unscrew the nut.