Channelling wall for 32mm waste pipe

A quick update on this: Unfortunately, on closer inspection I have come to learn that there is a joist very close to this wall. This rules out the possibility of concealed waste pipe eve if I channelled the wall. I could only do this now if I notch the top of this joist as well as channelling the wall. I doubt anyone is going to recommend that?


I will still send the waste pipe in between these joists and keep them below floor level but will now have a pedestal basin with the waste pipe and water pipes running behind this.
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Thought I'd drop a note on where I am at:


The waste and water for basin and cistern have been passed under the floor.

I'd welcome your feedback.
Personally I'd have put the pipe in the wall if you really wanted that way. Those chrome exposed traps are pants tho.
To put it in the wall, I would have had to take a chunk out of the joist that is sitting right next to the wall. That was a stretch too far for me.
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