Where are the temperature, volume and diverter controls located and how do they operate?A.
The Hansgrohe 27143 has a built in diverter and mixing valve. The controls are at the base. You also need the rough in which goes in the wall with the plumbing.
How do you operate to switch between head shower, hand shower, and faucet?A.
The Hansgrohe 27143821 has a diverter on the tub spout for the hand shower and shower head.