I’m fitting a concealed shower and can’t work out how this outlet will work with the tanking. I’ve done this a fair bit with bar type shower mixers, and I’m used to sealing the tanking around the 2x 15mm pipes sticking out the wall with bar mixers, but for this one it looks like there’s just going to be a hole drilled through the tiles and tanking? Or can I mount the wall plate elbow so it’s flush with the wall and tank up to it? Hope the question makes sense, cheers.

