Yes but leave the pipes open to make sure any residual water can escape as steam rather than turning to steam with nowhere to go and making it go bang. Is this a temporary or permanent decommissioning of the back boiler?
thanks for your help originaly they where geting rid of the rayburn when the the central heating was installed with a new hot water cylinder [indirect] but then changed thier minds and wanted to keep it and as the new cylinder is in a different position and not able to be gravity feed and it would be a pain to connect some rads to it whitch would be the best thing and not knowing alot about rayburn stove other than there a pain to move i was looking for some advice so to sum up it would be permanent
You could also look at filling the boiler with kiln-dried sand - cap off the bottom tapping and fill from the top, but preferably dry the boiler out first. If you get a funnel with a flexible spout it's quite easy to do.
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