This question is regarding Gummers Wax Thermostat Element - SK740012

Checking Themostatic valve

I'm using this to replace an Ultra thermostat in a Ultra 3/4 Dual Control Shower Valve. Putting it in hot water only gets max 1mm of movement compared to cold - is that broken?

And I suspect I need the spring it connects to (as the thermostat keeps dropping inside the spring loops. What is the part required for that (do I also need the brass spring back piston assembly?
Asked 11 years ago by Anonymous
From what you say I suspect that you have not put things back correctly.

www.showerdoc.com/shower-spares/sirrus-by-gummers/GUM-SK1500-3-Sirrus-Thermostat---Piston-SK1500-3

The picture here shows the way things should go, ignore the "O" ring, this is where the spring should be.
If the thermostat moves 1mm I would change it.

Answered 11 years ago by Anonymous

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