How much load can an average plasterboard wall take?
The lifetime guaranteed safety answer is zero load. And that's what I would stick to if I were you.
So when I start rebuilding my ensuite, after I finish ripping it apart, it's worth adding extra noggins to the studwork to support the radiator/basin/shower?
@Brommers started
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The lifetime guaranteed safety answer is zero load. And that's what I would stick to if I were you.