You will need a compression "tee" fitting and a compression stop valve available at your local home improvement or plumbing center.

  1. Shut off the main water supply to your home.
  2. Select the location for the valve on your water line, preferably a vertical pipe, if available. This reduces the possibility of sediment getting into the icemaker.
  3. Open the faucet to drain the line, and then close the faucet.
  4. Cut the copper water line and place the compression ring on the pipe. Slip the end of the compression ring onto the end of the pipe that will meet the other piece. Slip the ring on just far enough to see that the pipe is fully through the compression ring. Do the same thing with the other end of the T-fitting.
  5. Tighten the compression nut using your fingers, and then use a pair of pliers to turn the compression nut another half turn. Do this on both sides of the valves.
  6. Once the T-fitting is in place, use the same procedures from section 5 to install the stop valve.
  7. Turn on the water and inspect all the joints for leakage. Tighten nuts if leaks occur.
  8. Rout the fill tubing from the refrigerator to the new stop valve. Slide the compression nut and ferrule onto the tubing.
  9. Turn the water on to flush the tube into a pail for at least 1 quart or until the water runs clear.
  10. Shut off water at the new valve.
  11. Connect the tubing to the valve by hand, and then turn one extra time with a wrench.
  12. Connect the ferrule and pressure nut to the hose at the refrigerator end.
  13. Attach the nut to the refrigerator valve. If applicable to your refrigerator, run the tubing through the hose clamp to hold it at the preferred angle.
  14. Turn on the water at the pipe valve. Check again for leaks. Tighten nuts if leaks occur.
  15. Plug in the refrigerator.
  16. Set the ice maker to the "on" position as indicated for your specific model and discard the first two or three batches of ice to flush the system.