Backersafe 18" Immersion Heater and Thermostat Standard Copper Sheathed Immersion Heater for use in normal and soft water areas. Backersafe Immersion Heaters are manufactured to the latest Legislation of BSEN60335-2-73. Two specific clauses within this specification are aimed at eliminating the risk of boiling water. The most significant requirement is that the Immersion Heater be isolated from the mains supply, should the primary thermostat fail with the contacts closed, which would allow the water to reach a temperature in excess of 85¡C. SPECIFICATION: High grade stainless steel Safety legislation: BSEN60335-2-73 18" under-head length 2 1/4" BSP head Fitted with 15 amp thermostat 3000 Watts 240V B.E.A.B approved WHY BUY FROM US: _Fast, Free Delivery. _Experienced and Trusted Seller. _Expert Customer Service.