Running waste pipe through load bearing wall

Joined
18 Feb 2026
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United Kingdom
Hi all,

I’m renovating my bathroom and currently the waste water & soil pipes run above floor to the main stack in a hallway cupboard next to the bathroom. I would like to run both pipes under the floor but upon further inspection it looks like the wall between the cupboard/ hallway and bathroom is load bearing as there is brick work under the floor separating the two.

If this is the case am I able to drill through the wall to run the waste pipes without weakening it’s structural integrity ?

Many thanks in advance
 

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