This question is regarding Sirrus by Gummers Wax Thermostat and Piston - SK1500-3

Bristan Thermostatic Cartridge

Hi, I have this Bristan shower as in the attached picture. Would I be right in saying these are the two halves to the valve assembly? SK1500-3 & SK971006. The issues I having are that the pressure is normal when the valve is first opened, when it heats up the pressure slows right down and sits red hot. Any advice would be greatly appreciated.
Asked 6 years ago by Shaun
You sound like you may have a blocked or restricted filter on the cold side, but check your hose and head are not blocked as well.

Answered 6 years ago by Barrie Seabright

Hi Barrie,

Thanks for the reply.

Do you sell a replacement kit for this model? Or is it a case of simply dismantling and cleaning?

I assume you can identify it from the picture?

-Shaun

Answered 6 years ago by Shaun Barnett

www.showerdoc.com/bristan-colonial-sequential-brass-cartridge-sk971006

The above is the cartridge in your shower, and there is a list of the showers it fits into at the bottom.

You should chose which shower is yours and check where the inlet filters etc are and maybe check them to see if they are blocked.

Answered 6 years ago by Barrie Seabright

View Product and Order Online:

Do you need any additional help to find the correct spare part?

Please click the following link if you would like to see other answers or ask a question regarding the Sirrus by Gummers Wax Thermostat and Piston - SK1500-3

If you've landed here and this question is not about your specific product, please take a look at these similar items on our Bristan Other Spares Spares page. Alternatively, if you're looking for any other brands you should view our full range of Shower Spares.

If you do not want to proceed with a repair or you want to buy this item or similar, please consider one of our Replacement Bristan Other Spares

For any other support request please get in touch.