If you’re tapping a sink with a valve then you will need a wrench to disconnect the water supply from the cold water shut-off valve. There will be standing water and you will need to drain it. You then want to attach a tee fitting (an adaptor used to connect separate pipes) to the shut-off valve and tightly fit it into place using pliers. Next, you to connect the sink water supply to the tee fitting and then connect your refrigerator to the third outlet of the tee fitting.
If you’re tapping a sink without a valve then you will need to use either a self-tap saddle valve or a tee stop valve. Make sure the diameter of the inlets matches that of your pipes. With a self-tap saddle valve, you will simply attach the valve to the pipe, and with a tee stop valve, you will have to remove the section of the sinks water supply line that you plan to cut. After cutting out a section of the water supply pipe, you will deburr the interior and exterior of the pipe. Finally, you will securely attach the valve to both ends of the piping.
Adding a water line will require you to run a line through your cabinets or flooring so that you can tap into the nearest water supply pipe. You will need to locate the water supply line and drill a hole into it. You want to ensure that the path you use will not disrupt any wiring or separate plumbing fixtures. The hole must ¼ inch in diameter through which you will run the tubing. Then you will follow the same steps we listed when installing either a self-tap saddle valve or a tee stop valve.