A domestic water heating cylinder uses one or sometimes more electrical elements to heat its water. The water is stored in the cylinder and kept a certain temperature. After years of loyal and constant service, these elements can be plagued by something called scale deposits. These deposits can reduce their efficiency and they can become overheated and even short circuit. You can carry out a regime to clean the deposits from the elements, however, if you don’t feel confident to carry out the task, then, you should call a professional service like Hampstead Plumbers.

To begin the process you will need to isolate the power to the heater and then follow these steps:
Firstly, empty the cylinder by turning off the cold water valve fitted on the top of the water heater. Connect a rubber hose to the drain valve at the bottom of the water heater, and open the drain valve and a hot water tap.

Once the tank is empty, you can use a screwdriver to undo and remove the access cover to the element. It is possible that you may need to move some insulation in order to see the element.

Disconnect the wiring and remove the element(s) as there could be more than one fitted. The element(s) are normally secured attached with a series of bolts, or they have a threaded base that screws straight into the cylinder.

Once removed, clean the element, with a solution of sodium carbonate and water or vinegar mixed with water. (2 tablespoons of vinegar or 2 tablespoons of sodium carbonate in 1 quart of hot water) and a cleaning pad. A Hampstead Plumber can install heating elements.

Should the element be corroded you will need to fit a new element. Cooler than normal water, erratic hot water, and a smaller than normal supply of hot water are all signs of an element that is corroded. Re-fit the cleaned or new element(s).

Reconnect the wiring. Fill the water heater by shutting the drain valve and turning on the cold water supply valve, making sure that the hot water tap that is situated the furthest from the heater is left open to purge all the air from the system.
Check for leaks and replace the insulation and panel covers, and then turn the power supply back on. “