My expansion tank would not take any air (full of water) I trawled the net looking for advice on how the tank works and how to ease pressure in the tank to recharge with air. Excellent video which sorted my problem - Thanks.
For a start the test was done outside, the decking gives that away. The pellet went into a big box of rags, perfectly safe. The child was around the corner of the house out of sight.
Before criticising on what you don't know - 'think about it'
My expansion tank would not take any air (full of water) I trawled the net looking for advice on how the tank works and how to ease pressure in the tank to recharge with air. Excellent video which sorted my problem - Thanks.