When the time comes to replace your
clawfoot tub faucet, you have many options. According to
The Facts On Faucets, an article featured in
This Old House, a good idea is to replace the old faucet with one of a similar style. This means, if you have a faucet that mounts to the bathtub wall as opposed to the rim or bathroom wall, that style bathtub faucet should be your first choice.

Another factor to consider when replacing a
clawfoot bathtub faucet, is the size of the drillings. Drillings are holes drilled into the tub by the manufacturer. The number of drilled holes can vary as well as the distance between the holes. If the measurement results are not standard and you have a unique distance between the drillings, you will want to purchase a faucet with
variable centers. The distance between holes is no matter to be concerned about because these tub faucets are equipped with
swing arms.

The article
Claw Foot Tub Installation: New Plumbing, includes step by step photos and instructions on installing the necessary plumbing for your
clawfoot tub. Depending on how much replacement is needed, you may be able to skip some of the beginning steps.
Included when purchasing a new
clawfoot bathtub faucet, are installation instructions. Enlisting the help of a plumber is recommended on most instructions to ensure the product warranty is valid. These
installation instructions are an example specifically created for a
Randolph Morris Wall Mount Tub Faucet with Handshower (with variable centers, as mentioned above). Depending on the type of clawfoot tub faucet you choose, the installation instructions will vary. Installation instructions for the tub faucets can be found before purchase, below the Specifications section at the bottom of each product page.

View different styles of
clawfoot bathtub faucets and
faucet sets which include a faucet, drain, and supply lines. Also learn how to choose the
correct style faucet for your clawfoot bathtub.
Sources:
This Old HouseDIY