Help with square thermostatic cartridge removal.

[GabeBury]

Hello, I am trying to replace the cartridge but I can not see where is the grub screw, please find the picture and kindly advise how I can remove the cartridge. Regards

 

[Ben-gee]

You need to unscrew the cartridge using the brass hexagonal flats that are somewhat recessed into the body. This will require a socket of the appropriate size, possibly a thin walled socket - or a box spanner.

 

[GabeBury]

You need to unscrew the cartridge using the brass hexagonal flats that are somewhat recessed into the body. This will require a socket of the appropriate size, possibly a thin walled socket - or a box spanner.

Thanks a lot, i will take the whole bar out for better control and acccess. and will get back with the outcome. areciate your time and help. regards

 

[GabeBury]

You need to unscrew the cartridge using the brass hexagonal flats that are somewhat recessed into the body. This will require a socket of the appropriate size, possibly a thin walled socket - or a box spanner.

Amazon product
I bought this cartridge from amazon, is it gonna fit as a replacement for

Adora Thermostatic Cartridge MB1122​

?

 

[Basher]

The cartridge you mention is this:

Crosswater Adora Thermostatic Cartridge For Blade Multifunction Valve - Mb1122 | Spare Part

Official Stockists of Crosswater Adora Thermostatic Cartridge For Blade Multifunction Valve - Mb1122 - Buy it now from the UK's leading supplier of Crosswater Cartridges & Thermostatic Cartridges

www.showerdoc.com

The Amazon one is very different, so No. Why not buy the correct one?

 

[GabeBury]

The Amazon one is very different, so No. Why not buy the correct one?

Hello, I just did not know what to buy as I wasn’t aware of my mixer make nor model, still wondering how a brand new mixer get a faulty cartridge in less than 2 days after it’s first use

 

[Basher]

Hello, I just did not know what to buy as I wasn’t aware of my mixer make nor model, still wondering how a brand new mixer get a faulty cartridge in less than 2 days after it’s first use

I agree a new mixer should't be faulty. If it's a new installation, were the pipes were flushed out before the mixer was fitted?
Could you tell us the nature of the fault?

 

[GabeBury]

I agree a new mixer should't be faulty. If it's a new installation, were the pipes were flushed out before the mixer was fitted?
Could you tell us the nature of the fault?

The mixer worked super nice for 2 uses, water temperature was true to the boiler setting, after that till now it’s just warm enough when it’s at max. Same temperature, never hotter or colder, the hot water pipe hot before the mixer bar.

 

[Basher]

The mixer worked super nice for 2 uses, water temperature was true to the boiler setting, after that till now it’s just warm enough when it’s at max. Same temperature, never hotter or colder, the hot water pipe hot before the mixer bar.

You imply that the valve is still changing the temperature, but the output doesn't get hot enough any more - is that correct?
If you press the button to bypass the 38 degree stop (or whatever it is!) and turn the knob round futher, does the water get hotter, or are you saying at absolute max setting, it's still not hot enough? There's normally a way of changing the relative position of the knob/stop, so it covers the correct range of temperatures.
But I don't see why that should suddenly change if it was working fine to start with.

 

[GabeBury]

You imply that the valve is still changing the temperature, but the output doesn't get hot enough any more - is that correct?
If you press the button to bypass the 38 degree stop (or whatever it is!) and turn the knob round futher, does the water get hotter, or are you saying at absolute max setting, it's still not hot enough? There's normally a way of changing the relative position of the knob/stop, so it covers the correct range of temperatures.
But I don't see why that should suddenly change if it was working fine to start with.

the valve is still changing the temperature, but the output doesn't get hot enough any more, also at absolute max setting, it's still not hot enough.
That’s why I thought it has to be the cartridge

 

[Basher]

the valve is still changing the temperature, but the output doesn't get hot enough any more, also at absolute max setting, it's still not hot enough.
That’s why I thought it has to be the cartridge

If you take the knob off, can you turn the shaft of the cartridge up (ie in the hotter direction) any further?
I just wondered if it was where the knob has been put on that is stopping it being turned up.
May not apply to your model though - could be worth a try?
Other than that, and assuming the hot water is hot enough, I'm afraid I don't have any other suggestions 🤔

 

[GabeBury]

If you take the knob off, can you turn the shaft of the cartridge up (ie in the hotter direction) any further?
I just wondered if it was where the knob has been put on that is stopping it being turned up.
May not apply to your model though - could be worth a try?
Other than that, and assuming the hot water is hot enough, I'm afraid I don't have any other suggestions 🤔

If i take the knob off,I can turn the shaft of the cartridge up (ie in the hotter direction) and same result. Don’t you agree it could be a faulty thermostat cartridge.?

 

[Basher]

If i take the knob off,I can turn the shaft of the cartridge up (ie in the hotter direction) and same result. Don’t you agree it could be a faulty thermostat cartridge.?

Yes, I do agree, could indeed be. As long as the hot water is really hot, that seems to be the only explanation!
Can you return the faulty one to the plumber or supplier of the shower to get a replacement f.o.c.?

 

[GabeBury]

Thanks, I shall update the thread once I tried relacing the cartridge, just waiting on the box spanner to arrive.

 

[GabeBury]

Yes, I do agree, could indeed be. As long as the hot water is really hot, that seems to be the only explanation!
Can you return the faulty one to the plumber or supplier of the shower to get a replacement f.o.c.?

Hello, I managed to change it, there is a hot water now, but when I open the flow valve to the max I hear a hard knocks, I believe it’s a pressure issue, could a cartridge cause such a thing .?

 

[Basher]

Hello, I managed to change it, there is a hot water now, but when I open the flow valve to the max I hear a hard knocks, I believe it’s a pressure issue, could a cartridge cause such a thing .?

Well done for sorting it.
It's possible there are/were entrapped air pockets in the water after changing the valve, that could cause such noises.
However that should go away after first use.
I'm not aware that a ceramic cartridge valve, or thermostatic valve, can cause such a thing.
Maybe others may know?