This question is regarding Sirrus 1850/968 Thermostatic Cartridge without Thermostat - SK1850-2

Sk1850

My shower pressure is good on cold as soon as I turn the heat up it looses power. I have serviced the cartridge but problem still exists. I tried your trick with the thermostat dipping in cold water then hot but the small piston did not come out of the wax. Do I need a new thermostat if so is the Sirrus/Gummers Opac TS1500/TS1503, Thermostat and piston assembly compatible
Asked 8 years ago by Paul
www.showerdoc.com/grohe-wax-thermostat-00798000

If you need anew thermostat then the above should be suitable.

Answered 8 years ago by Anonymous

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