In message , IMM writes

"raden" wrote in message
...
In message , Richard
writes
How do I descale the heat exchanger on my gas fired central heating
system.

If it's badly scaled up, you need a descaling pump and the appropriate
chemical (see the Fernox or Kamco websites)

As it happens ... I have a descaling pump, I'm in Watford

Maxie, how much do these cost to buy?



I would have thought you would have known such things. I have no idea
what mine cost, but they're not cheap.

For anyone interested

http://www.kamco.co.uk/descaling.htm

might be a useful site to look at
--
geoff