I'm fitting an external shower valve, one part of this fitting has the valve screwed onto it, what does the 15mm fitting screw into on the wall. There is nothing in the box for this or in the instructions and Victoria Plumb don't know!!!
It might be the last of it until they come to try and get spares for their shower/taps etc in a few years time, at which point they'll discover they aren't available! At least it seems like the shower you're fitting can be easily replaced...
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