Step 2 · Disconnect Water Supply Lines
Position your bucket under the supply line connections. Using a basin wrench for hard-to-reach nuts or an adjustable wrench for accessible ones, loosen the coupling nuts that connect the flexible supply lines to the threaded tailpieces of the old faucet. Turn the nuts counter-clockwise. Once loose, you can usually unscrew them the rest of the way by hand. Be prepared for a small amount of water to drain out. Let the lines drop into the bucket.