Thermostatic valve

[bmsslamb]

I have a multifunction shower, monsoon head shower, massage jet cabin. The functions are selected from one knob and the water temperature from a knob below the function selector. I have a pressure regulator valve in line before the shower inlets and a 2bar pump supplies the needed pressure.
The thermostatic valve has stopped working giving only tepid water. I have removed the control knob revealing the brass spline, what I need to know is, how do I remove the valve?

 

[ChrisR]

That depends on the model!
Often a big box spanner is involved.
See showerdoc .com for lots of pictures of internals

I don't see why you need a p reducing valve after a 2 bar pump. Mines 4 bar...

 

[bmsslamb]

The manufacturer stated that I needed to have equal pressure on both hot and cold, hence the pressure equalising valve.

 

[bmsslamb]

The attached photos may help to explain my problem. Do I need a special spanner to extract the valve?

 

[seco services]

remove the circlip then go from there.

 

[bmsslamb]

The following internet site has a PDF of exactly how to do it;
www.browneshealth.co.uk/Thermostatic ​Cartridge.pdf

There's no need to remove the circlip

Thanks anyway