If it is a conventional back boiler heated by a coal fire, it is probably a
direct as opposed to indirect system. There will be 2 large pipes going to
the hot water cylinder in the airing cupboard - or wherever - to permit
These must be disconnected at the hot water cylinder, and the holes in the
cylinder must be blanked off. You must first drain the hot water cylinder
(and its associated header tank - unless there is a gate valve or stop tap
in the feed pipe (the pipe which runs from the bottom of the header tank to
the bottom of the hot water cylinder).
Once the pipes are disconnected at the hot water cylinder, you can
disconnect the bottom ends from the back boiler. Unless there's a drain tap
on the back boiler, you'll need to catch or mop up the water held in the
boiler itself and in the pipes.
The boiler should be easy to remove once the pipes are disconnected.
You can leave the pipes in place - just removing a bit from each end for
access or cosmetic purposes.
I,m presuming that when I had central hearing installed 20yrs ago that they
disconected the back boiler. There are no "blanks" on the tank. Would they
use the back boiler connections for the CH?
Unlikely. So by "back boiler", we just mean a heat exchanger for a solid
fuel fire, and not a central heating boiler?
If so, it'll probably just be a case of physical removal. I'd trace the
current central heating pipes to ensure that the back boiler isn't still
connected to the system, though. It should be pretty obvious, particularly
if the central heating is a fully pumped modern system.
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