Stop Cylinder Corrosion

Corrosion is a big problem when water and metal interact, so there is a piece of metal called an anode which is fitted in water heating cylinders. This piece of metal actually slows down the rotting process that follows this reaction in the cylinder, ultimately being the metal that rots instead of the walls of the cylinder. Usually this rust is only found when it is too late and the cylinder leaks. A Grove Park Plumber can supply and fit the right type of anode. So this is why the rod or anode is fitted.

The Anode: Sometimes referred to as a ‘sacrificial anode’ the rod just sits still in the cylinder and because it is constructed from magnesium and zinc, it will start to rot long before the cylinder metal does. This action will increase the lifespan of the cylinder quite considerably. Unfortunately all this takes place inside the cylinder and it is not possible to see the condition of the anode. Therefore you will need to remove it for inspection. A Lee Plumber is experienced with anodes. This operation can be carried out once every two years as the corrosion process is quite slow. These anodes can be replaced reasonably easily, and are available in different shapes and sizes, so make sure you have the correct detail ready for your system when you need purchase the replacement. The detail should be on the water-heater body.

Replacing an Anode:
1). Isolate the power supply to the immersion heater and the cold water inlet valve that sits on the top of the heater, then, unscrew the hex bolt securing the anode, and take out what is left of the anode.
2). Fit the new anode in reverse order of removal. You can wrap Teflon tape on the thread of the new anode to stop leaks.

Finally:
Re-instate the power and water supplies, switch the immersion heater back on and inspect for leaks.

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