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Hot Water Heater Replacement Anode - 500mm Magnesium

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  • Hot Water Heater Replacement Anode 500mm Magnesium
  • Hot Water Heater Replacement Anode 500mm Magnesium - 20mm - 3/4" BSP
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  • Hot Water Heater Replacement Anode 500mm Magnesium - Tech Tip


Hot Water Heater Replacement Anode 500mm Magnesium  

Could your Expensive Hot Water Tank be rusting away?

A Sacrificial Anode in a hot water tank is manufactured from a metal alloy with a greater negative electrochemical potential than the metal it will be used to protect, in this case your hot water tank. The sacrificial anode corrodes instead of your hot water tank, SIMPLE! Magnesium and aluminum are the two types used by the hot water tank manufacturers, plumbonline stock the full range of sizes in "rod" straight and "flexi" which can be bent for easy replacement were access is an issue. Water heater tanks are notorious for rusting out especially in certain water conditions. Once the tank rusts through, there is only one solution - replacement.

All water heaters leave the manufacturers already fitted with at least one sacrificial anode to protect against rusting. The sole purpose of the anode is to corrode away instead of the tank. Checking the anode at least every 3-5 years or earlier depending on your water quality and replacing if necessary will add to the life of your water heater at a very small cost. Not to mention avoiding the inconvenience of having a new water heater installed, there is never a convenient time for this to happen.

What is a Sacrificial Anode?

The anode is a metal rod usually magnesium, aluminum or zinc. The anode is usually screwed into the top of the tank or built into a special holder, plumbonline stock Aluminium or Magnesium anodes in "rod" or flexi" format.

How does it work?

Electrolysis eats away the metal anode instead of the metal of the tank. Once the anode is gone the electrolysis will then attack the tank and it will begin to corrode. If your water heater has an annual service agreement it is a good idea to ask your licensed plumber to check the anode during the service call.

What do you get?

  • One (1 Qty) 500mm Long Rod Magnesium Anode
  • Hex Nut with 20mm / 3/4" BSP thread
  • plumbonline's rapid order turnaround, even for late afternoon orders
  • Delivery to your door

How to change your anode

  1. Turn off water and fuel supply (gas or electricity) to water heater.
  2. Partially drain the water heater using the Pressure relief valveLocate the anode rod on the water heater; usually located under a plastic lug or metal disc at the top of the hot water service.
  3. Use a 20mm or 3/4 -inch deep socket 27mm (approx.) to unscrew the anode rod from the hot water service.
  4. If the anode rod won’t budge, slip a steel pipe onto the socket handle for extra leverage. lift out and discard the old anode rod.
  5. Wrap teflon tape around thread of new anode rod; insert anode rod into water heater and tighten.
  6. If limited space above the Hot Water Service prevents the installation of a standard anode rod, install a flexible type.
  7. Turn on the water and fuel supply to the water heater.
  8. Wait for the tank to reach temperature and check for leaks and replace the disc or lug.
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