Install clawfoot bathtub faucet

The taps for this clawfoot tub have a 3/4" thread outlet on the back of the taps. I am just wondering what is the normal way to connect the tub to the shutoff valve? I suppose I could install reducing couplings on the taps, or make a custom supply line in pex, but maybe there is a better way?

thx.

Normal way to do it is to use "leg tub Risers".Available in several finishes,we usually get them from Elizabethan Classics.In this day and age its become kind of a specialty item.

anyway it's not a pipe thread it's a running thread.
So don't pipe it together.

Thx Lancaster, your post pointed me in the right direction. The actual part I needed is called a Bathcock Elbow.