This 1 3/4" BSP boss incoloy sheathed immersion heater is 11" long and specially designed for use with unvented cylinders. It features dual cut-out protection and comes with a 2 year UK warranty.

• Incoloy sheathed domestic immersion heaters
• 1 3/4" BSP boss to fit unvented hot water cylinders
• Dual cut-out protection - both rod thermostat and manual reset
• BEAB approved
• 2 year UK warranty