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  • Fitted a thermostatic shower (mira) 4 years ago, combi boiler and it all worked fine.
    Recently the flow is noticeably weak, it still regulates the temperature, but just less water comes out.
    Hot water pressure in the other taps seems fine. The shower is more powerful when first turned on, but then seems to throttle back.

    Any ideas what's wrong?

  • Scaled up? London water is very hard and destroys things. Might need descaling?

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