Step 2 · Disconnect Faucet Supply Line
Place a small bucket or bowl directly underneath the angle stop to catch any water that spills out. Using an adjustable wrench, turn the coupling nut on the faucet supply line (the flexible tube going up to the faucet) counter-clockwise to loosen it. Once loose, you can typically finish unscrewing it by hand. Have a towel ready to catch drips and wipe the area.