With hw on only feel all pipes round the valve about 6"-12" away from valve if all 3 are hot then the valves passing to heating when not on.
The heating pipe should be cold when hw only selected.
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