Andy Hall wrote:


Then don't do it. This is a cylinder of hot water at 60 degrees,
stored under mains pressure - up to about about 4 bar. Really,
according to Building Regulations they are supposed to be (legally
speaking) installed and maintained by a plumber specifically trained
on pressurised cylinders.


Alternatively, you could just get the cylinder replaced with a new
pressurised one. However this really is a job that is supposed to be
done by a trained professional. If you were a 10/10 person on
plumbing then I'd suggest that you make your own value judgment on
whether to DIY, but since you say 8/10, then I would think carefully.
If you get it wrong then you can create a dangerous situation.


Mine was installed by a complete gibbon, and I had to help him read the
instructions.

It isn't quite as bad as you make out, because its cold water you fill
it with. And that won't go BANG - just **** out of any joints. The
standard way to pressure test a steam boiler is to fill it with water
and pressurise it...for that reason..

The real danger is, if it ever boils. Thats why its equipped with safety
valves and a pipe to vent steam out of. THIS is what needs to be
thoroughly tested. A boiler of steam DOES explode, and is lethal.

Even iof you do get a 'qualified' p[lumber to instrall it, I'd suggest
reading the nstructions and cheacking up on what he does, and making
sure any recommended tests are carried out.