I'm sure this must be simpler than I'm making it out to be. Can anyone tell
me how on earth you're supposed to attach concealed shower outlets to the
wall?? The type in question look a bit like Screwfix part no. 58943.
Wickes (where I got it from) reckon the pipework effectively holds it in
place, but I'm dubious of this. It comes with a rubber washer the size of
the outlet itself and that's it. By the looks of it an angled tap connector
fits of the back.
Any ideas? The thread isn't even long enough to reach through the wall. ?!?
The thread is 1/2" BSP so you're in Meccano-land as to how you connect
to it. I think I did the one in my own bathroom with a wall-plate elbow
buried in the wall (it's from a shower mixer valve that's embedded in
the wall) and then screwed the outlet into it. I probably wrapped PTFE
tape around the thread so it'd hold tight at the right angle. If you
wanted to connect to it from the other side of a wall you could connect
a 1/2" BSP female X 15mm solder or compression fitting to a bit of pipe
and take that through to the other side. In this case I might be
inclinded to Araldite the outlet's thread into the fitting so that the
pipe through the wall becomes an integral extension of the outlet
connector (using a solder-type fitting, natch)
Cheers for the reply! I'm building the wall (aquapanel and tiles) in situ
so I'll not be able to get to the back of it once it's tiled. The
wall-plate elbow sounds like the way to go but I still don't see how I can
fix everything in place and then tile over the top, if that makes sense -
not without breaking a tile in half, cutting a semi-circle in each half, and
carefully sliding them under the outlet. Seems like a bit of a bodge
though - is there not a better way of doing this? Why don't they come with
fixing kits so you can fit the outlet *after* you've tiled?
Use a wall plate elbow (probably 15mm x 1/2 BSP) screwed to a batten
fixed between studs. Fix so that the outer face of the elbow will be
flush with the tile surface. Then do your tiling, having made sure
that the elbow is on the joint between adjacent tiles so that you can
cut a semi-circle in each tile. When tiles have been grouted fix the
outlet to the elbows - don't forget the PTFE tape.
Thanks for the info. Can I just ask, if I'm doing it this way (fitting the
tiles *before* fitting the wall outlet), why do I need to have a semi-circle
cut in each tile? Surely I could just have a 1/2" hole in a tile at the
point where the outlet needs to get through the wall.
I guess this will work providing I manage to get the adhesive exactly the
right thickness and also fix the wall plate elbow at exactly the right angle
so that when the outlet is tightened it's not at a bizarre angle. I
certainly can't think of a better way of doing it so cheers! :-)
You could do that. It all depends where you expect your grout lines to
I, for example, had my shower valve & outlet all positioned based on
200mm tiles & 2mm gaps. Then when I got the tiles I found they were
actually 198mm wide. That _would_ have looked like a crap bodge, 1/4"
off a grout line, so I had to move the valve & outlet.
Yeah, make best estimate of tile & adhesive thickness when fixing the
elbow. If you briefly screw the outlet into place immediately after
fixing the tiles, it'll squash the tile/adhesive to the right level +/-.
I finally fixed my outlet with a good dose of silicone joint compound on
threads, locked in place & no leaks.
Just to report back on this one, it went slightly awry but not the end of
the world. Even though I carefully measured the depth of the wall plate
elbow beforehand it's slightly *too* recessed - so when it came to
tightening up the shower outlet to squeeze the adhesive down I cannot FULLY
tighten it for fear of cracking the tile. I think I've come up with a plan
involving some silicone, PTFE, plumbers mait and lots of washers stacked on
top of each other. So, I have a couple more questions...
1. Fibre or rubber washers?
2. What's the best thing to use to seal the thread between the wall elbow
and the shower outlet? Lots of PTFE, plumbers mait or something else?
Thank you! :-)
I would try wrapping hemp around the thread and sealing over it with a
sealant like Fernox LS-X. The hemp should expand on contact with water
and give a mechanically tight seal, and the sealant should seal the
You will probably find it a bit difficult to drill the 1/2" hole in
exactly the right place so that the tile lines up with those around
it. I presume also that you have a suitable 1/2" drill for tiles?
A bit of tolerance on the adhesive thickness won't matter 'cos you can
adjust the distance that the fitting screws on to the elbows by
more/less PTFE tape. My shower fitting (Triton bar type) came complete
with 2 offset couplers which can be adjusted so that you get the
shower fitting exactly level even though the elbows are a bit out of
line or not exactly on the correct centres. IIRC they give about
+/-5mm horiz/vert adjustment. It's a bit fiddly but it worked
eventually. I'm not sure if these can be bought separately from the
shower, you could try Screwfix.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.