This question is regarding Aqualisa Aquavalve 900 - Concealed PBV - Shower Spares

Aqualisa C900.20

this has started to let-by. Would it be due to limescale build-up? If so Could a flush of citric acid cure it
Asked 6 years ago by Simon
It is likely to be a faulty / damaged "O" ring or internal damage , which may be due to limescale.
Flushing may solve or exasperate the problem.

Answered 6 years ago by Barrie Seabright

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