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Concealed shower 2 dodgy cartridges?

Discussion in 'Plumbing and Central Heating' started by Matt887, 5 Feb 2021.

  1. Matt887

    Matt887

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    I have a friend whos had a bathroom fitted by someone. The shower is concealed and never got hot from the start. The plumber returned and swapped the cartridge and the shower worked fine for 3 days. Then it stopped getting hot again. Is it likely 2 dodgy cartridges is the fault? The shower is from victorian plumbing. I wonderd of if could be a pressure issue. Thanks.
     
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  3. terryplumb

    terryplumb

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    Quite possibly either. What provides the hot water , is it from a hot water cylinder fed from a loft tank ?
     
  4. Matt887

    Matt887

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    It's a combi boiler I think.
     
  5. terryplumb

    terryplumb

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    Combi runs on mains water pressure ,so that shouldn't be an issue. But you may be wrong on type of boiler ??
     
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  7. Matt887

    Matt887

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    If hot water from a cylinder you mean could be unequal pressures?
     
  8. Matt887

    Matt887

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    I was possibly thinking the mains pressure could be too high effecting the cartidge.
     
  9. terryplumb

    terryplumb

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    Yes ,that's possible . Thermostatic mixers need balanced pressures.
    Gravity fed showers would need cold from the tank in loft. And hot from the cylinder.
    If it is a combi boiler both would be under mains pressure.
     
  10. Matt887

    Matt887

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    I've had it before on a combi system we're the shower wodnt get hot unless had the stop take turned right down. Or fit a flow restricter or pressure reducing valve.
     
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