I am guessing that you are referring to the pressure on a sealed system if you are anything between 1-1.5 Bar when cold is fine it will increase slightly when hot , doesnt matter how big or small your system is if the expansion vessel is properly sized
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