Step 8 · Install New Faucet Trim
With the wall repaired and sealed, you can install the final trim pieces. Remove the test cap and plastic depth guard from the valve. Slide the trim sleeve (if included) over the valve body, followed by the large decorative escutcheon plate. Seal the top and sides of the escutcheon with a bead of silicone caulk, but leave a small gap at the very bottom to allow any water that gets behind it to escape. Attach the handle according to the manufacturer's instructions; this usually involves a small set screw. Finally, screw on the new shower head (use Teflon tape on the threads of the shower arm) and install the new tub spout. If it's a slip-on type, slide it on and tighten the set screw. If it's a screw-on type, apply Teflon tape to the pipe threads and screw it on tightly. Turn the water on and test the function of the handle, diverter, shower head, and tub spout.