Non thermostatic shower for hard water area

Joined
11 Feb 2020
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East of England
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United Kingdom
We have very hard water and my Aqualisa Midas Plus shower gets scaled up and the valves are stiff to turn.

I have to replace the temperature cartridge every couple of years.

The shower runs off a Vaillant Combi Boiler.

Would a simpler non thermostatic mixer shower without a temperature cartridge be less prone to scaling up ?

The other thing I don't like on the Aqualisa is the flimsy plastic flow/temperature controls which frequently come unscrewed .... would prefer something more robust !!
 
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1. I doubt you would notice much difference between thermostatic and non-thermostatic with respect to limescale settling.
2. You would however likely notice the difference if someone flushed a lavatory while you were having a shower. Possibly scalding.
3. A proper water softener would cost somewhere around £1,500 to install and around £100 a year for salt / occasional maintenance. Say £250 a year over 10 years.
4. £250 a year is a fair number of shower cartridges.
5. Perhaps try removing the thermostatic and flow rate cartridges once a year, soak in de-scaler, and replace. Add some silicone grease to seals on re-assembly. If the shower has filters / non-return valves, de-scale these at the same time.
 
5. Perhaps try removing the thermostatic and flow rate cartridges once a year, soak in de-scaler, and replace. Add some silicone grease to seals on re-assembly. If the shower has filters / non-return valves, de-scale these at the same time.
I haven’t seen this mentioned on the forum but seems practical maintenance advice instead of using till faulty and then replace.
 

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