To validate the warranty of your unvented cylinder you must have your cylinder serviced annually by a suitably qualified service engineer. Homeowners should keep proof of annaul maintence.
English
![logo_white.png]](https://knowledgebase.jouleuk.co.uk/hs-fs/hubfs/logo_white.png?height=50&name=logo_white.png){kind=logo}
To validate the warranty of your unvented cylinder you must have your cylinder serviced annually by a suitably qualified service engineer. Homeowners should keep proof of annaul maintence.