On Thu, 20 Aug 2009 20:43:25 +0100, Harry Bloomfield
wrote:

You can maybe get away with more than one pipe, but not to be relied
upon unless it is designed for more than one pipe. Basically you throw
the whole lot away and get a new kit - unless it is a commercial kit
which is refillable/expensive

I never knew that. I realised the can would run out eventually but I
thought it would last for a few jobs first. Is the jacket thrown away
each time too?

I looked in the airing cupboard and there was a gate valve to isolate
the hot water. Unfortunately it has rusted and cannot be turned
because of the rust! However there was a drain cock so I could drain
the tank, meaning I did not need to buy a freezing kit.

I ran into other problems though, the tap connector nuts were seized
in place because of scale, so I've started another thread about that
(please help!)

Thanks again,
Stephen.