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How does an immersion heater spanner work?

How does an immersion heater
spanner work?

Shop for Immersion Heater Spanners

Close up of octagonal grip in head of immersion heater spanner An immersion heater spanner is designed to fit snugly over the top of an immersion heater element. The octagonal shape cut into the ring matches the octagonal shape around the base of the heating element.
flat immersion heater spanner attached to an immersion heater element As the spanner fits against all of the sides of the element’s base, the grip is tight and firm. Once the spanner is attached to the heater element, applying pressure to the handle will tighten or loosen the element.

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