I am in the middle of a bathroom renovation. I would like to install two shower heads. I am not sure what the best way to set this up.

Can I use one set of valves to run both shower heads?

Will the 1/2 inch copper lines allow enough water volume to pressurize both heads from one set of valves, or do I have to install tow sets of water valves?

I would like to use one set of knobs for both shower heads and then an on/off valve to opperate the second shower head. Any advice or help will be greatly appreciated.