Flo-Rite Plumbing. Specialist in Hot Water Systems in Brisbane and the Gold Coast
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Hot Water Anode Replacement 1300 785 989

Anode Replacement – the easiest way to extend the life of your hot water system.hotwatersacrificialanode  

HOW TO PREVENT erosion to your hot water system is so easy?
You can literally double the life of your HOT WATER System by replacing the sacrificial ANODE!
What is a Sacfrifical Anode?
An Anode is a magnesium rod installed inside your hot water tank and is the only thing that
protects your tanks steel cylinder from severe corrosion resulting in premature tank failure.   
Every hot water tank comes with one and will only last about 4-5 years, but once your Anode is depleted
there is nothing to stop the destructive affects of corrosion on your tank - keep the tank you've got and
look after it, replace the Anode in it and it will last up to twice as long.
If your hot water tank is over 5 years old then you need to replace your Anode NOW!

  • You will save $$$ by making the hot water tank last up to 3 times longer
  • You will save $$$ on electricity or gas when your tank is operating efficiently.
  • You will save $$$ on the hassle of frequent hot water replacements.
  • You will be helping the environment – less tank replacements
  • You will put less pressure on our valuable resources - electricity, gas & water.
  • Your hot water will be much cleaner for use in the household

Flo-Rite Plumbing offer a FREE ANODE INSPECTION on your hot water tank.

We Expose What They Don't Want You To Know And How You Can Add Years To The Life Of Your Hot Water Tank…
Saving You Thousands of $$$
Why do Hot Water Heaters have an anode in them?

Every brand of mains-pressure hot water storage heater with a vitreous enamel (glass) lined tank,
is fitted with one or two sacrificial anodes, to ensure that corrosion cannot take place during the
warranty period of the tank.  

By simply replacing a water heater’s anode as required, (just when that is will depend on the size,
type and model of the water heater) the same protection is provided that keeps ships afloat, underground
steel pipelines and tanks corrosion free and even Australia's and the World's sea-based oil drilling platforms
intact.  That’s why the manufacturer put the anode there in the first place.

What causes corrosion?

Corrosion in water heaters is associated with the passage of minute electrical currents which travel through
the metal and the water.  Corrosion takes place at the anodic areas (the anode) which are the places where the
current releases ions to dissolve in the water.  Cathodic areas develop at other sites (the water tank walls)
where the circuit is completed and at these places, provided there is an effective anode working inside the
electric or gas hot water tank no corrosion can, or will, take place.  Anodes corrode - cathodes do not.  
Once the original anode stops working, the steel tank will react with any dissimilar metal, particularly
non-ferrous metals such as the copper element and brass plumbing fittings.  Once this occurs, the water heating
tank wall becomes anodic and corrosion (rust) commences and the hot water system will very quickly rust through.

How Anodes work?

Anodes are manufactured from a special grade of magnesium and they protect steel by a sacrificial
electro-chemical action.  Magnesium is electro-negative relative to steel.  When a magnesium rod is fitted to a
steel hotwater tank filled with fresh water, a current will constantly flow through the water between the rod
and any exposed steel area on the tank wall.  The circuit is completed through the tank back to the magnesium rod.  
This protective current is produced by the magnesium releasing ions, and this results in corrosion in the anodic
area.  This type of rust protection is called “sacrificial”. The magnesium (the anode) corrodes instead of the
steel tank (the cathode).  This principle of electrolytic corrosion control is called cathodic protection.  
Because cathodic surfaces cannot rust, the  hot tank is protected.

This principle is nothing new.  No experienced boat owner would risk the propeller, rudder, shafts or other
exposed metal equipment on his boat, when all it requires to ensure that they do not corrode, is to keep an
effective sacrificial anode in place on the hull of the craft or on the motor itself in the case of outboards.  
The same system is used on all commercial shipping, oil drilling platforms as well as underground pipelines and
storage tanks.  It’s far more economical to replace the anode than to allow the vessel itself to corrode.  
This logic also applies to domestic and commercial  hot water heaters.

What about older heaters?

The older a water heater is, the greater the likelihood of it having little or no remaining active anode and at
the same time, having experienced an appreciable deterioration of the "glass" lining, thus leaving areas of'
exposed steel wall where corrosion may have already started.  While that corrosion cannot be reversed, it can
certainly be arrested by the introduction of a new anode, which can get to work by reversing the electrical flow
and converting the hot water tank wall back to a cathode (parts of it will have become anodic after the original
anode ceased operating).

Once there is any discolouration of the hot water, the heater is usually too badly rusted to be saved by fitting
a new anode.  
Original equipment replacement parts

The sacrificial anodes Flo-Rite Plumbing supplies and fits are manufactured by the same company which supplies
anodes to the heater manufacturers themselves.  They are genuine, original equipment anodes and will therefore
not void manufacturers' warranties.  They are manufactured to exacting standards as laid down by
Standards Australia and are approved by every water authority in Australia.


All gas hot water, electric hot water and solar hot water mains-pressure water heaters with a vitreous enamel
or bonded ceramic coating utilize a sacrificial anode to provide additional corrosion protection.

RHEEM, BEASLEY and QUANTUM  solar heaters.  



These are mostly found in older homes and they are rarely supplied new nowadays due to the fact that the hot water
supply relies on gravity alone and as such, it is not very satisfactory for showering.


Instant hot water systems are small, wall-mounted instant water heaters which heat the water continuously
as it passes through them.  Common brands are BOSCH, PYROX, ZIP, RINNAI Infinity, BAYARD  and RHEEM Integrity.


These water heaters look similar to the ones that do require an anode.  They are generally the same size and shape
but the hot tank is either stainless steel or copper and does not require an anode. Brand names to look out for
with a stainless steel tank are AQUA-MAX gas heaters and EDWARDS and BEASLEY, in both electric and solar types.  
Heaters with a copper tank include SAXON COPPERFLOW and RHEEM COPPERMATIC.  These copper tanks are no longer
available due to the high cost of manufacture.  There are probably some other, less common brands still in service,
so check the specification label and other information printed on the hot tank in order to correctly identify the
type of water heater.


For  water heaters in the BRISBANE and GOLD COAST area, the anode should be inspected as close as possible to the
times detailed above. Under average conditions, it is normal that an anode will require replacement at these times.  
Even if there is apparently still sufficient magnesium left, it is often heavily coated with mineral deposits and
it is therefore unable to provide effective protection for the heater’s tank.

All sacrificial anodes, when manufactured, were extruded onto a central core of 3mm diameter mild steel wire.  
Thus, as an anode corrodes away, it progressively exposes that wire core.  Generally speaking, the sphere of
influence of an active anode is approximately ten centimetres (four inches). Thus, if the amount of exposed wire
at the top or bottom of the anode exceeds this amount, it is safe to assume that that section of the heater's tank
is no longer receiving protection from that anode.

We have found that anodes fitted to Rheem hot water heaters and Vulcan hot water systems wear more at the top and
those fitted to Dux hot water heaters (previously Hardie Dux) are more inclined to wear at the bottom.  
This creates a situation when checking Dux heaters where there is insufficient headroom to fully remove the anode
to inspect the bottom.  It cannot be assumed that the anode is still OK just because it is solid at the top.  
In this situation, it is best to follow Dux's recommendation and replace the first anode at five years or, at the
very latest, as detailed in our timetable above.  For the benefit of installers, you can judge the amount of wire
core exposed at the bottom by tapping the anode against the inside wall of the tank.


Most water heaters have an identifying sticker, or label, detailing the heater’s capacity, model and serial numbers
plus other technical details relating to its operation.  This sticker will show the date of manufacture of the
heater and a close estimate of when it was installed will be two or three months after this date. If the sticker
has faded or been damaged, you will have to check back on receipts or ask the previous owners of the home.  
If it's not possible to determine the age of the hot water system, then a water discolouration check and an
inspection of the anode is the only way to determine the remaining life of the heater.

The identification label on Rheem and Vulcan cylindrical electric and indoor gas heaters is located around the top
of the heater. Dux electric heaters have the label in the middle of the heater at the front.  Square outdoor gas
heaters have the sticker located inside the pilot light cover plate.


Many  water heaters are installed indoors in the garage or laundry, or under the eaves on the outside where there
is insufficient headroom above the heater to remove the old anode and fit the replacement. In these cases, the old
anode is removed by cutting it in sections and the replacement anode is a specially developed flexible type.  
Nevertheless, a minimum amount of space above the heater of 35 to 40cm is required to fit the new anode.


Most water heaters BRISBANE and the GOLD COAST last around 7 to 15  years. There are always exceptions and we have
seen heaters 20 or more years of age which are still providing good, clean hot water. On the other hand, we have
also seen water heaters which have rusted through at 4 or 5 years of age. Obviously both extremes are quite rare,
but they do happen. Experience has shown us that, once rust gets started, it takes about two years for it to eat
right through the tank wall. Therefore, the average heater only starts to rust at the 7 or 10 year mark. For this
reason, we have set a limit of 10 years for replacing anodes in standard model heaters, after which we are reluctant
to replace the anode. Again, exceptions are sometimes made when the heater looks in good condition and where the
anode is still working. (That is when grey metal is clearly visible, indicating anodic reaction is still taking place.)  
Water quality is tested and if there is no discolouration, the anode will be replaced.


If the water heater fails within 12 months of the replacement, we simply refund the cost off you new tanks installation.  
Once the heater has lasted 12 months, we know that we have replaced the anode in time before the rust has gone too far
and that the heater can be expected to last the life of the new anode.
This guarantee does not apply to anodes sold on a supply-only basis where we have not had an opportunity to inspect
the water heater prior to installation of the anode.

To book your FREE Anode Inspection Contact us with an Online enquiry or call us now on A hot water anode or “sacrificial anode” is essential in keeping your hot water tank in its best condition and extends the lifespan of your water tank, as it prevents corrosion of the tanks. ... Anodes are steel core rods surrounded with either magnesium, aluminium or zinc and are installed on the top of hot water tanks. 

Sacrificial Anode Replacement to your hot water system, hot water heater, hot water tank, hot water unit.hot water anode replacement brisbane gold coast

Ever Heard of a Sacrificial Anode?

A sacrificial anode is a vital part of your hot water system. Having it inspected can be the difference between an efficiently working system and a costly replacement tank. Manufactures recommend that you maintain the anode in your hot water system in order to prevent damage from rust and corrosion.


Due to the hardness of Brisbane and Gold Coast water we recommend inspection at no more than 5 year intervals and replacement if required.

When it comes to hot water in Brisbane and hot water on the Gold Coast, we are the experts. If you are looking for water heating repairs or replacement, we offer the best advice you need to make an informed decision.  Whether you need a hot water anode replaced, a hot water element replacement, hot water thermostat repairs, or replacement hot water systems, heaters, tanks or units, a circulating pump for hot water, we offer the best hot water system prices in Brisbane and the Gold Coast.  We are Licensed & Insured Solar Hot Water, Gas Hot Water Service, Heat Pump and Electric Hot Water Service specialists as well as Plumbers, Drainers and Gas Fitters.  All of our technicians have Plumbing, Drainage, Electrical and Gas Fitting Licences.

Our service vehicles are fully equipped to carry out hot water repairs to all major brand Hot Water Systems, Hot Water Heaters, Hot Water Tanks and Hot Water Units including brands like Rheem, Vulcan, Dux, Bosh, Solahart, Aquamax, Saxon, Quantum, Conergy, Stiebel Eltron, Zip, Pyrox, Beasley, Edwards, Supakwik and more.  We offer hot water solutions tailored to suit your changing needs and are an accredited service and warranty agent for all leading brands of electric, gas, heat pump and solar hot water systems. Working closely with manufacturers and energy authorities will ensure our products are of the highest standards and up to date with changing regulations. Best of all we guarantee quality service at competitive prices. Turn to us for free advice and quotations for your new hot water heaters or hot water units and receive prompt attention from our experienced and qualified staff.

Contact us now on Brisbane 1300 785 989 or Gold Coast 0403 600 293

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