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Failed Immersion and Fitting Willis Jacket External Heater

Posted: Thu Oct 06, 2016 11:22 pm
by florence44
My immersion heater has failed in my indirect copper hot water cylinder, and it is proving impossible to remove the failed immersion.
On searching for an answer to my problem, I found that a small copper tank called a Willis Jacket External Immersion heater could be fitted externally to the hot water cylinder.
Has anybody ever heard of them,or fitted one, and were they any good ?