In a nutshell there is a very loud vibration noise coming from one of the header tank pipes (exiting the tank). The pipe is physically shaking and I can feel it in my hand.
From what I have read I thought it might be water hammer, however yesterday it went on non-stop for over 15 minutes - so not so sure.
I realise it is going to be very hard to diagnose but I have uploaded a video which hopefully somebody might be able to have some ideas on...
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!