Things You'll Need
Delta designed its Roman tub faucets so they can easily be removed by a homeowner, for whatever reason. You will find that you only need a few minutes and two tools to remove the faucet and to install its replacement. Delta uses plastic valve cartridges instead of numerous tiny parts, making the job even easier and eliminating the risk of dropping a small spring or rubber seat down the tub's drain.
Close the main water valve in the house to cut off the flow of water to the faucet. Double-check the water is completely shut off by opening the faucet using both handles.
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Locate the small hex screws that sit in the base of both control handles on the faucet. Use an Allen wrench to loosen the screws until the handles are loose enough that you can slide them up and off the faucet.
Use a wrench to turn the nuts that sit just below the handles counterclockwise until they back off the faucet assembly. Grab the tops of the valve cartridges with a pair of pliers and pull them directly up and out of the water pipes.
Turn the diverter rod, if the water spout has one, counterclockwise until it comes out of the spout. Pull the spout directly upward to remove it from its position.
Install the replacement faucet by reversing the steps you used to remove the old one.