How to Change a Bathtub Faucet in 9 Steps

Shut off the main water valve to your home before starting. Run your bathtub (if possible) for about 30 seconds or however long it takes to drain out.

Find a rag or cloth to place over the drain once you've emptied your pipes of water to prevent any screws or small objects from falling down it.

Some handles will have a cap located on the top of the handles. Remove the cap and then unscrew the handle to remove it. Other handles will have a setscrew in the side. Unscrew the setscrew, being careful not to lose it, and remove the handle. If the handles are too tight, you can purchase a handle puller that will help remove it without damaging the plumbing.

After removing the handles, you’ll need to remove the sleeve that protects the stem or cartridge by pulling it out or unscrewing it. Then, you’ll remove the stem—the part of the faucet that controls the water temperature. The tool for this could vary by manufacturer, so you may need to visit the hardware store to purchase one.

Before you can remove the spout, you’ll need to know which type of spout you have. Threaded spouts screw onto the pipe, while slip-on spouts are secured to the pipe using a screw. Each spout requires a different method for removal.

If You Have a Threaded Spout 

Score the sealant around the spout with a utility knife to make it easier to unscrew. Twist the spout clockwise to unscrew it. This can be difficult and require both hands. If you can’t unscrew it on your own, use pliers or a wrench.

If You Have a Slip-On Spout

Score the sealant around the spout with a utility knife to make it easier to remove. Use a screwdriver or Allen wrench to remove the screw that secures the pipe to the spout. Pull the spout off the wall.

Bring your old unit to the store. A specialist there can help you find a newer model that'll fit the space.

It's also a good idea to measure the spigot extending from your wall. Most extend 6 inches from the wall, or they’re built into the wall. Your new bathtub faucet will need to match this setup. You may also need to purchase plumber’s tape for the spout if you don’t already have some.

Now's a good time to shop around for other bathtub renovation projects. For example, you might consider refinishing your bathtub or adding a liner if it's older.

To install the new stem, simply place it in the hole and screw it into place and tighten it with a socket wrench or appropriate tool. If there are two handles, repeat the process being sure not to overtighten the stem. Replace the sleeve by screwing it back into place and tightening it with a pipe wrench.

Install new handles by sliding them over the new stem and securing them in place with the screw. Replace the screw cover. You should also use a caulk gun to add caulk around the base of each handle. This will protect the wall from any water that may run from the handle.

The way you install your new spout also depends on the type: 

Threaded Spout 

Before you attach the new spout, wrap plumber’s tape around the threading of the wall pipe. Hold the spout in position, then twist it clockwise to screw it in place. You may need to use pliers or a wrench to tighten it completely. In this case, make sure you use a rag between the pliers and the spout, so you don’t scratch the finish.

Slip-On Spout 

Slip the spout over the end of the wall pipe. Make sure it’s set in place so the base is flush against the wall and the spout faces down. Insert and tighten the screw to secure the spout.

Add fresh caulk around the edges of your spout where it meets the wall. You might consider buying a bathtub faucet cover and installing it over the new spigot. This step may be optional depending on your plumbing setup and the new device you choose to install.

Once everything's in place, turn the water main valve back on and test the new faucet. If there are leaks, check the screw or make sure you turned the faucet enough times to lock it into place. Adding caulk around the edges and allowing it to dry may also solve the problem.