I need to change a diverter valve on a Vaillant plus 828e do i have to drain the system or can i just take old valve off and refit with new one if somebody could advise me this would realy help me
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.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local