Thank you for your question. The 3 setting diverter is needed if you have two components of water like a hand shower and a shower head. If you are only wanting the 51205-CZ hand shower installed, you will want to install just the R10000 MultiChoice Valve body along with the valve trim kit. Here is a link to the valve trim kits:
When you get to this link, filter 'Shower Valves' under 'Type'. You can also filter other options here as well.
Date published: 2018-05-19