Immersion fuse keeps blowing and slight leak

Hi, Hoping there is someone that can help me. Earlier this year my immersion heaters fuse switch blew (I have a very old copper tank) so first thing I did was get the thermostat changed. It then worked for a bit but the same thing happened. My plumber then changed the immersion element to a completely new one after lots of back and forth, and after working for a day the fuse blew as I was switching it off again! It has been stressing me out all year.. especially considering how stressful this year has already been... I am due a rewire of my flat so am wondering if the electrics may be at play or if it is something else anyone can advise? The fuse is 13amp.

So my second question is, there is a very very tiny leak from just under the element (this is post the previous issue). It is very small so not enough to cause considerable damage but it does need to get tightened, how easy is it to tighten the immersion element with a wrench to prevent this? Is there a way to do it with without having to call a plumber or removing it. Thanks in advance appreciate any help as my frustrations are high!

 

Thank you, the switch has just been replaced so I’m assuming it could be the immersion wiring as it is very dated. Thanks for this.

 

Hi I am not unfortunately, literally have little to no knowledge of electrics but will get it checked when rewiring commenced hopefully!

 

Ahh that’s such a shame, do you know how much this roughly costs? Thanks for your help