I'm in the process of building a custom 72"x52" shower that will have essentially two full spa like showers each with a rainhead, body sprays and a handheld shower. It'll be a Delta system so no more than two of the components can be on at once. My question is:
Do I really need two 2" or one 3" drains to cover this?
If so, which is best?
If the two 2" then do I just plumb them in in series or do they have to have separate drains?
If the one 3" will I have to run a full 3" drain line all the way to the main drain line in the house?
If two 2" how do I build a proper pan to slope it correctly?
Many thanks for the help.