Plumbing

fittings for mixer shower after tiling - advice needed

Anonymous user 28/02/2024 - 3.23 PM

Hello, I need some advice regarding fittings for a mixer shower I intend to have installed after my tiling is done. At the moment I have a hot and cold 15mm pipe (from my combi) sticking out through the wall and they are 150mm apart and pretty close to level (+-5mm). If I need to alter them I would like it done before tiling, so I can attach a mixer shower afterwards. I've not chosen the exact shower yet, as I'm waiting on a friend who said they could get hold of a good one at a reduced price. It will likely be a Grohe or Hansgrohe and have a rainshower fitting overhead. I should have fitted a shower plate before plastering, but didn't know about them at the time. I'm pretty sure that whatever kind of shower I have installed will need a thread to screw a nut onto and that a pipe alone is no use. I would have to break the finished tile and dig out enough wall to fit a compression of some sort. Years ago I fitted a Grohe bar shower and had to dig out my old wall for the s union adapter. As tiling is yet to be done I can fix it so the finished tile won't get ruined. I need advice on what fitting I should put onto each pipe and roughly how much should I have sticking out beyond the finished tile? (I am thinking of removing some plasterboard and fitting a good quality S union onto the pipe and having it stick out around 20mm beyond the tile, assuming adhesive and tile will be 20mm on top of the plasterboard. How does that sound? Do both Grohe and Hansgrohe always have a standard fitting that screws onto a 3/4 thread?) Any help and advice would be hugely appreciated.