Diverter valve stem leaking

Joined
23 Feb 2026
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Country
United Kingdom
Is this fixable without replacing the entire valve assembly?
FP_2026-11-15-243.jpg
 
Could this be cleaned up and refitted or is there some soft part that's likely knackered?

FP_2026-11-15-243 (1).jpg
 
The valve stem looks clean along the sealing section (and was also quite a snug fit) which makes we wonder if the leak isnt between the metal stem guide and the plastic housing.

FP_2026-11-15-244.jpg
 
Would vinegar be ok to try and clean or does that risk further corrosion or rubber swelling?
 

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