Age of valve
If you send images of your shower / thermostat or cartridge we should be able to help identify what thermostat is needed.
www.showerdoc.com/grohe-avensys-wax-element-00798000
www.showerdoc.com/sirrus-thermostat-for-use-with-old-metal-piston-sk740013
www.showerdoc.com/grohe-avensys-slider-for-therm-07587000
Al the newer versions have the thinner longer thermostats with the plastic slider and they can be tested using this link to a video below -
www.showerdoc.com/sirrus-thermostat-for-use-with-old-metal-piston-sk740013
Answered 8 years ago by Anonymous
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