1.   Immersion heater spanner Electric immersion heaters fit into a large screwed boss on the top or side of a hot water cylinder.

2.   Kerosene immersion heaters were supposed to keep the water boiling to sterilize our mess gear.

3.   Separate airing cupboard with foam dipped hot water cylinder, immersion heater and timer for boiler.

4.   There are also special timers for single-element immersion heaters.

5.   Water heating can also be taken care of using immersion heaters or gas multi-point heaters, with or without a timing system.

6.   To feed I s would suspect the immersion heater.

7.   I happen to know that she has an immersion heater and a large stash of tea bags in a desk drawer.

8.   Is there some kind of immersion heater to keep the water flowing in that sump, something like a sump heater for a diesel car?