12V/240V Twin Immersion Heater Element | 2 1/4″ BSP | 300W/750W
The Surejust 12V/240V twin immersion heater provides dual voltage heating capability in a single 2 1/4" BSP element. With a 300W 12V side for use on battery power and a 750W 240V side for shore power or mains, it is an ideal solution for calorifiers that need to heat from both on-board electrical systems and shore power connections.
Please note: the lid design may differ slightly from the product photograph.
- 300W 12V side
- 750W 240V side
- 2 1/4" BSP thread
- Dual voltage in a single element
- Suitable for marine calorifiers and hot water cylinders








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