grey cartidges fail after 2 years max
The first cartridge failed after approx 1.5yrs - we endured it for another 6-12months, as I hadn't realised this was what had been causing the lack of control or stability to the water temp until a plumber pointed it out.
The cartridge was found to be badly corroded at one end of the temp sensitive helix where it it is held in place (the metal clamp holding the helix end appeared to be the rusting culprit) - so it had been moving freely sometimes and jamming partially in place at others explaining the erratic water temp.
I replaced it with another grey aqualisa cartridge.
1.5 - 2yrs later the second cartridge is showing the same symptoms.
Question: why would the cartridges fail so quickly & why are they corroding? Surely they should be manufactured to not rust apart after so short a time?
Many thanks for any help you can provide.
Regards, Mark.
My first thought is if you have a combi boiler then you have the wrong cartridge!
In my experience the rust forms at the end of the bimetallic coil however also in my experience there has never been enough rust to impair the operation of the cartridge.
I think if you want a fuller reply you will have to go directly to Aqualisa.
Answered 11 years ago by The Shower Doctor
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Aqualisa Thermostatic Cartridge - All water systems (Grey) - 022801
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