The Draper Immersion Heater Wrench is a heavy duty box wrench designed for the installation and removal of electric immersion heaters in domestic hot water cylinders. This specialist plumbers tool features an integrated tommy bar for additional leverage when working with stubborn or over-tightened heater elements. Sized at 3 3/8" AF (85mm octagonal), this wrench is specifically engineered to fit standard immersion heater nuts found on hot water cylinders with moulded insulation. The box wrench d
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