Hello I am currently working on a home project which I have taken out my bathtub all together. I have planned on making it shower only and purchased the shower head and adjustment handle to add on. My question is the old system has a 3 knob system which I want to convert to just the on round handle that has hold and cold on either side and only works for the shower head can you explain please:confused:

It Doesn't Matter How Many Knobs. You Still Only Have One Hot And One Cold Inlet Line To Hook Up.