Removing immersion heater

[Dereekoo]

I've changed a few, never known one split.

A winner!!

 

[dilalio]

So DIYer turns off water at mains - tries to graunch off immersion with improvised tool and it doesn't move. Next uses extension bar on tool - puts boot against opposite wall of airing cupboard and heaves. Tank creases and splits at boss boss joint. Jet of water sprays out of split and keeps going till header tank empty and kitchen flooded.

So, DIYer should get control of system in lieu of catastrophic failure.

Identify if isolators to cistern ball valve and cylinder cold feed are present.
Ease and adjust to check working order.
If seized, drain CWSC via hot taps.
Take opportunity to replace and install isolators.
Drain some water from cylinder via drain cock - if it works. If not, syphon from top having removed hot outlet.
Refill CWSC, with cylinder feed now isolated with new lever valve, whilst beginning to attempt removal of immersion heater.
Try various methods until it gives.
Drain more water from cylinder until below level of immersion boss.
Then fully remove.
Paste up new immersion so it is easy to remove in future.

 

[Nige F]

I used heat on bottom entry immersions - left the lamp on it until the gasket went Bang ! Have to disagree with dilalio re paste - used ptfe on the threads