thanks for the advice. What is there to fail on an auto air vent? surely it just releases air. should I not worry about the fact that there is water dripping from the pump?
Thanks for your response. Do you think I could use the Fernox leak sealer F4? I am not exactly sure how that stuff works, but it seems to be pretty good for small leaks.
Thanks
I have replaced all of the radiators in our ground floor 2 bed flat over the summer. In doing so I boxed in some of the pipe work in the master bedroom and the lounge.
When the weather turned cold about a month ago, I switched the heating on. In the master bedroom the noise knocking pipes...