Hi all,

Health warning : I am a complete numpty at plumbing and have never
done any plumbing work in my life, so you'll have to speak to me as if
I was a slighlty retarded kid...

So, here goes :

One of my sealed CH pipes is banging like mad when the boiler goes on.
I think I have located the noise to an underfloor pipe which used to
feed 2 radiators. These radiators have been removed in the summer and
the pipe capped off. However, there is still a 2m section of
horizontal pipe remaining.

From reading this archive, I believe an airlock might be causing this.
The question, you've guessed it, is what can I do about it? Do I need
to bleed the entire system (and if so, how?, and how do I fill it up
again afterwards, in particular wrt corrosion inhibitor etc). Or is
there a simpler way?

TIA

Greg