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

IMPORTANT NOTICE!!
Your hot water system may be about to rupture or rust through and the ramifications are enormous.   HOW TO PREVENT erosion to your hot water system is so easy…  You can literally double the life of your HOT WATER System simply by replacing the sacrificial ANODE!
 

What is a Sacfrifical Anode?
An Anode is a magnesium rod that is 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... 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

At Call The Plumber Sydney we 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.  In Sydney, where the water quality is quite good, (an average TDS* reading of 90 parts per million) anodes in small water heaters can last for as little as 4 or 5 years before being expended and thus allowing corrosion to commence.  NB: Refer to the section - “How long should an anode last before it needs replacement” to see how long an anode should last for all sizes of water heaters.

                                                                                                                        (*Total Dissolved Solids)ids)

By simply replacing a 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.

To book your FREE Anode Inspection

call us toll free on 1800 65 92 30 today

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.  It's a simple matter to test for rust damage of the tank by filtering the hot water through several layers of closely woven white cloth directly from the hot tap for 30 seconds. (A make-up removal pad also works very well).  Any tank corrosion will cause some discolouration of the water which will be evident on the cloth.

Original equipment replacement parts

The sacrificial anodes which we supply and fit 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. 

WHICH TYPES OF HEATER USE AN ANODE FOR CORROSION PROTECTION AND WHICH ONES DO NOT.

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. 

The common brands are RHEEM, VULCAN, EVERHOT, and HARDIE DUX as well as  SOLARHART and RHEEM solar heaters.  Less common brands are BEASLEY, LANGCO, ZIP and QUANTUM.

WHICH WATER HEATERS DO NOT HAVE AN ANODE

1.   GRAVITY FED HOT WATER TANKS LOCATED IN THE CEILING.

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.

2.   ALL TYPES OF INSTANTANEOUS / TANKLESS GAS HOT WATER HEATERS.

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.

3.   STAINLESS STEEL AND COPPER HOT WATER STORAGE TYPE HEATERS.

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 LANGCO 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 heater.

WHEN TO INSPECT THE ANODE

For  water heaters in the Sydney metropolitan 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.

To book your FREE Anode Inspection

call us toll free on 1800 65 92 30 today

HOW TO TELL THE AGE OF A HEATER.

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. Early model Vulcan hot water heaters don’t have these details, so if you have one of these models, or if the sticker has faded or been damaged, they 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.

INSTALLATIONS WHERE THERE IS INSUFFICIENT HEADROOM.

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.

MANUFACTURERS RECOMMENDED TIMES TO REPLACE THE ANODE.

On the last page is the relevant section which has been scanned from the Owners Handbooks for both Rheem and Hardie Dux water heaters detailing their recommendations concerning the replacement of the sacrificial anodes fitted to their heaters.  This page is printed on the back of the letters we post out to clients before phoning them. The manufacturers have not been as specific as we have been in specifying inspection times for all sizes of heaters.  Our experience tells us that, the longer the anode, the longer its life.  Nevertheless, all  water heater manufacturers are very definite in recommending that anodes should be replaced in order to ensure maximum effective life of their heaters.

WHEN IS IT TOO LATE TO REPLACE THE ANODE?

Most heaters in Sydney last around 7 to 12  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 a few 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.

To book your FREE Anode Inspection

call us toll free on 1800 65 92 30 today

OUR ANODES HAVE A MONEY BACK GUARANTEE

If the 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. 

Extract from RHEEM OWNERS GUIDE (Portion of Page 5)

Extract from DUX WATER HEATERS OWNERS HANDBOOK (Portion of page 13)

WATER ALARMS

Water Alarms – why they are so important!

YOUR HOME IS 85% MORE LIKELY TO BE DAMAGED BY WATER THAN BY FIRE.  ALARMED????

I bet you have smoke alarms in your home. You might even have carbon monoxide alarms (if you do not, get one right away!).  Do you have water alarms?  Unfortunately, few do.

Home flooding is a serious matter and more common than you think. Just look at the number of water restoration companies that have cropped up to deal with the aftermath.  Water alarms will help you identify the problem quickly, before too much danger occurs. 

A water alarm is the difference between a disaster and an annoyance! 

The Water Alarm has been developed to detect even the smallest amounts of water before damage can occur.  Placing water alarms in critical spots throughout your home can go a long way to ensure your home will be protected from the expense and destruction of water damage.