What sort of life should you get out of an indirect hot water cylinder. Mine is 32 years old. I had to have a tall skinny one installed to fit the airing cupboard. The airing cupboard is now dismantled as I was taking down the lath and plaster and was going to rebuild a bigger airing cupboard to take 450mm cylinder. It would make some sense to fit it now before I have the walls plastered and rebuild the cupboard if it is not expected to have much life left.
Kevin