A friend of mine has an elderly hot water storage tank that is heated
primarily by Economy 7 electricity. The tank has a single immersion
heater aperture into which fits a vertically mounted dual element
immersion heater.

This immersion heater has two element fitted to the single boss, one
being 36" long and provides whole tank heating overnight at the E7 rate,
the other element is 12" long and provides a "top up" if required during
the day but at full tariff electricity.

It seems that the long element has failed and despite spending all
morning looking I have been unable to find a replacement (it looks like
the modern practice is to have two short horizontal elements one at the
top and one at the bottom of the tank.


Can anybody point me at a supplier that still sells dual element
immersion heaters? (If not it looks like a whole tank replacement job)

Thanks.


--
Chris