I have a plumber that just installed the rough ins for four body sprays. I wanted to have the valves for the shower, body sprays and rain shower to to the right of the body sprays at the same level. He said he couldn't do that because any elbow in the pipe reduces the pressure and with all the things we have in the shower that is the last thing I want to do. I changed the set-up at his request but am now having doubts as after he finished today there are two holes in the adjoing wall ( which I discovered on my own) and the valves are not even close to being in a straight horizontal line so I am beginning to feel that he is just not as qualified as I would like. My other question is that he is installing a steam shower and wants to either put a hose attachement to it so that we can drain it or put a hole in the wall of the shower ( with some kind of casing) to drain the steam unit. I have never read of doing it either way. Everything I read says to connect to the drain pipe which he says he cannot do. Please help as we are spending a small fortune in the bathroom and I don't want to go any further with this plumber if he is doing things incorrectly.