RS PRO Heating Element, 3 kW, 220 V ac

Introducing the comprehensive range of industrial immersion heaters from RS PRO. These rod adjustable thermostats feature an Incoloy sheathed heating element perfect for hot water heating. These products work particularly well in heavy duty/hard or aggressive waters.

• Wired in single or 3 phase suitable for applications requiring either a single current or multiple.

• Control thermostat in the Incoloy 825 pocket, with all dual cut out heaters coming with a rod thermostat (supplied).

• Can be immersed in lengths up to 11 - 30 inches.

• BSP threaded brass head.

• Hoseproof polypropylene terminal enclosure which can be rotated in any position.

• Fitted with thermostat and jointing gasket.

Safety features:

• Dual cut-out.

• Separate secondary manual reset safety cut-out (alongside the dual cut-out) which is directly fitted to the actual immersion heater head.

• Hot water heating.

How do water heater elements work?

A water heating element is a pair of upper and lower heating elements that fit into a water heater of some sort. An electric current is passed through the elements which then heats the cold water.

What causes water heater elements to burn out?
Below are some causes:

• Power surge - a sudden voltage increase to the element caused by a power surge can be enough to burn out an element.


• Wires - a bad connection can cause an element to stop working.


• Thermostat tripping out- these have a high limit switch that shuts off power to the elements when temperatures exceed normal.


• Minerals - sediment collects at the bottom of the water heater tank, encasing the lower element. The element is forced to work harder, and will eventually fail.


• Air pockets - these allow the upper element to burn while not immersed in water, resulting in failure.

it is recommended that heaters over 3kW should be used on a 3 phase supply.