What on earth have you done to it
In all the time I have been servicing oil boilers, I have never had to change this part. What on earth have you done to it, and why did you need to disturb it?
I doubt whether Worcester even have a part no for it, but it will be available on special order from Riello. Do you realise how much you need to dismantle to replace it?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local