Hi & welcome to our listing for a Genuine Dyson Vacuum Side valve Cartridge. This part is known as 90122101.

 

This is a Genuine Dyson part.

 

This is the part located on right hand side from the front of the machine, and the side valve clips into it, if you have a broken or damaged side valve then this replacement could get your machine back up and running.

 

This will fit the following models:

 

Dyson DC4 Upright vacuum all version.

 

If your model is not listed or you have any questions please feel free to contact us using the contact seller link above.