a compression tee fitting or a saddle valve. Plumbers recommend removing a section of the cold water pipe to solder in a regular 1/2-in. copper tee. If you have CPVC (plastic) or steel pipes ...

Use pliers or an adjustable wrench to remove the cold faucet water line from its valve below the sink. Screw the female compression fitting on the tee adapter to the male threads on the existing ...