On 29/08/2016 22:23, John Rumm wrote:

There is probably one good message to take from that... don't work on a
cylinder when its still full of *hot* water - it only magnifies the
problems when something goes pair shaped! Let it cool down first.


Or pear shaped, even.

It's still advisable to loosen the heater with the tank full, such that
it can be removed more easily after the tank has been drained - but
obviously don't unscrew it fully with the tank full!
--
Cheers,
Roger
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