This question is regarding Mira Excel/Select Thermostatic Cartridge - 903.33

Water Pressure

My combination boiler is set to 1.5 bar....should the cartridge be set to high or low? The one I am replacing was to "low"
Asked 7 years ago by Peter
If your Mira Excel / Select is supplied by a combi boiler then the setting on the rear of the cartridge should be set to HP using the red key supplied with the shower at the time of purchase or that is supplied with a replacement cartridge.

Answered 7 years ago by Anonymous

View Product and Order Online:

Do you require any further help with Tap or Shower Cartridges?

Please click the following link if you would like to see other answers or ask a question regarding the Mira Excel/Select Thermostatic Cartridge - 903.33

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

If you would like to buy this cartridge or look others from the same brand, please view our Replacement Mira Cartridges (All)

For any other support request please get in touch.