Step 7 · Connect Water Supply Lines to New Faucet

This is the step most people slow down on. Take it one move at a time — there’s no rush, and you can rewind the clip as many times as you need.

Now, reconnect the main water supply. If your flexible supply lines are old or stiff, this is an excellent time to replace them. Wrap the male threads of the hot and cold shutoff valves with 2-3 clockwise wraps of Teflon tape. Connect the hot water supply line to the new hot water handle tailpiece and the cold water supply line to the cold handle tailpiece. Hand-tighten the connection nuts, then use your basin wrench or adjustable wrench to give them a final quarter-turn until snug. Avoid over-tightening.