my heating system is oil, whater is currently heated by immersion. the expansion tank fills over a number of hours even when the immersion is not on. the ball system in tank is working from what i can see, i had my wrap around boiler removed recently. i cannot see were the water is coming from. I have found that if i remove roughly a bucket full of whater stops the drip.
i would be greatful of any insight you might have.
i would be greatful of any insight you might have.