Tank or Cylinder Anode

Rust is a major problem when water meets most metals. It is a result of a reaction between oxygen, water and metal. Therefore, in plumbing, as these elements are together in abundance there needed to be a way of either stopping rust or at least slowing the process by which it occurs. That solution was to fit something called (to give it its full name) a sacrificial anode. This is fitted inside the water cylinder and is in the shape of a rod. It works by rotting itself, instead of the tank rotting. It counteracts the affects of the chemical reaction between the tank metal and the water in it. When the anode is in good condition the tank damage is greatly reduced. The condition however cannot be seen externally. So the tank or cylinder needs isolating and draining. When the drain off is complete, find and remove the anode with a wrench.

Around twice a year you should really visually inspect the anode for deterioration, this gives an idea of how long the anode will last. It is a good idea to include its inspection in your maintenance schedule accordingly. Kentish Town Plumbers know about anodes. Anodes are available in different shapes and sizes, so have the details of your system so that you get the correct one. This information should be on a label on the water-heater.


Remove and replace:

Isolate the power and the cold water inlet to the heater. Undo the hexagonal bolt that secures the rod in place, then take out what remains of the sacrificial anode rod. Fit the new one in its place. A Kentish Town Plumber can replace this. Fit the new piece in the reverse order. Be sure to use Teflon tape on the threaded fitting to prevent it leaking. Turn the water and power to the water heater back on.