Knob and Sleave Kit
The difference is the length of the rear skirt.
The surface valve has a longer skirt yours is recessed so the short skirt.
SK1850- 4C Concealed
SK1850- 4E Exposed
Answered 11 years ago by The Shower Doctor
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 Knob & Sleeve Kit Concealed Shower White - SK1850-4C
If you've landed here and this question is not about your specific product, please take a look at these similar items on our Sirrus by Gummers 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 Sirrus by Gummers
For any other support request please get in touch.