It's time to replace our old hot water cylinder, which I have just repaired, by soldering, after it developed a pin hole leak. The cylinder is in an airing cupboard in our bathroom, but I would like to relocate a replacement in the loft to free up space. and, as a DIY'er there are systems available that I am not allowed to install and I would prefer to avoid these. So, what are my options for a system that a DIYer can install in the loft? I case it's relevant, my water authority has a target water pressure to the outside stop cock of 1.5 bar. This is however, not guaranteed. I would also like