The element has failed in one of the two immersion heaters on my hot water cylinder. The problem is, I'm having real difficulty removing it so I can fit a replacement.
I bought this spanner, but can't unscrew the immersion by hand:
Does anyone have any tips? The cylinder is probably about 12 years old and this is a hard water area, so I imagine it's scaled up on the inside. Any point in trying to soak penetrating oil into it overnight? As it's a combination (fortic) type cylinder, it wouldn't be cheap to replace.
Thanks for any suggestions, Rich.