Hi! I'm taking out my tub/shower combination and replacing it with a shower only, with just one showerhead, a handheld on a slide bar. I was planning it this way to save money on plumbing, so I wouldn't have to switch out my valve. I'd like to have the supply elbow come out at the place where the tub faucet is now.

However, since my water will only need to come out at one place (the supply elbow), and currently water comes out at two places (tub faucet and shower head), am I going to have to change out or otherwise adjust the valve anyway to turn off one of those outlets?

Any thoughts you can give me on this matter are much appreciated.