Step 4 · Remove the Old Faucet Assembly
This is often the most challenging step. First, disconnect the flexible hoses that run between the hot/cold valves and the central spout tee. These are usually hand-tightened or require pliers. Next, use a basin wrench to reach up behind the tub deck to the large mounting nuts that secure the faucet handles and spout to the deck. The basin wrench is designed for this tight space. Latch its jaws onto a nut and turn counter-clockwise to loosen. It will take several turns. Once all three mounting nuts are removed, have a helper lift the old spout and handles from the top of the tub deck.