Author Archives: Rudy

How many hot water cylinder types is there?

Have you ever wondered about how many types of hot water cylinders there actually is?

We have complied a list of hot water cylinders for you, showing application, benefit and disadvantages helping you make an educated decision before purchasing your next hot water cylinder.

First of all we need to separate the PRESSURE TYPES from the MATERIAL TYPES. In New Zealand one can purchase almost any material type at three different pressures.

Most common pressure types available in New Zealand (Domestic Applications) 

    • Low Pressure, open vented systems where the pressure is provided by a cold water storage tank, open vent or rely on a pressure-reducing valve to reduce the pressure below mains pressure supply.
      Typical Pressure: 30 – 75 KPA, typically 3 – 7.5 metrets Head
    • Medium Pressure, open vented systems where the pressure is provided by a cold water storage tank, open vent or rely on a pressure-reducing valve to reduce the pressure below mains pressure supply.
      Typical Pressure: 75 – 120 KPA typically 7.5 – 12 meters Head
  • Mains Pressure, with a working pressure equal to incoming supply. Pressure can be limited to any requirement but using the appropriate valve work.
    Typical Pressure: Ranging from 120 – 1400 KPA (Domestic Supply is typically 350 – 750 KPA depending on requirement)

Mains pressure water heaters are the predominant type of new installation in Australia and New Zealand.

COMPARISON TABLE OF HOT WATER STORAGE TYPES AT DIFFERING PRESSURES. 

hot_water_cylinders_types

The following hot water cylinder material types are available in New Zealand

   CYLINDER MATERIAL PRESSURE ADVANTAGES DISADVANTAGES
Enamel Lined Low Pressure
Mains Pressure
– Supply of mains pressure
– Low cost supply Installation
– Very common in NZ
Requires sacrificial anode
8 – 20 year life expectancy
Copper Low Pressure
Medium Pressure
15 – 40 year life expectancy
– Large Storage at low cost
– Can be used for high temperature power
sources such as wetbacks and solar.
 

– Not suitable for most  modern tap ware
– Requires sacrificial anode
– Low pressure

Stainless Steel Low Pressure
Mains Pressure
– 15 – 50 year life expectancy
No sacrificial anode required
– Can be used for high temperature power
sources such as wetbacks and solar.
– Large storage at high cost
– Higher supply cost
– Come with the longest warranties

Shame on you BT plumbing and gas

We come across a lot of copy cats online. They steal content, ideas and images from others and later call it “mine”. Most content thieves don’t realise that search engines take content theft seriously and penalise such sites accordingly in organic search. A timeless record of all online platforms recorded by the Wayback machine will quickly reveal where content originated from. Search engines such as Google also provide time stamps, quickly disadvantaging such websites with copied content and this includes images.

In this instance several things were copied by BT Plumbing and Gas with the most obvious being images from our website. A quick Lead Gen site put together by the effort of others wanting to provide a unique experience to their users. Hot water cylinders Ltd legitimately purchased these images honouring the original copyright.

BT Plumbing and Gas may have employed a shoddy company or possibly knowingly copied our content. Either way, excuses aside, you are responsible for what you publish. We work hard to provide our users with an exceptional experience, contributing to a general better online experience fighting spam and content theft.

My advice is.. Try creating real authentic content that will actually benefit your users and if you completely fail in the “creativity” department and must “steal” other people’s work / ideas, do it in a way that is not so obvious to others.

The Original

original

The Copy

fake

Continuous flow hot water systems prices

With gas prices down, its time to upgrade to a continuous flow hot water heater!

To make it even more compelling we are now offering a fixed system price to upgrade from electric storage to continuous flow LPG or natural gas with everything included.

CURRENT GAS HOT WATER CONTINUOUS FLOW SYSTEM PRICING FOR NG AND LPG GAS

continuous_water_heating_natural_gas$2,800.00 incl. GST and installation natural gas

This installation includes everything you need to convert from your current hot water storage to continuous flow hot water.

We will supply and install a Rheem 27 continuous flow appliance in an approved location and certify the installation as required. This includes a connection to an existing natural gas meter. Whether you currently have low or mains pressure this is full supply and install price which includes everything you need to get into that endless hot shower you have been craving!

 

 

continuous_flow_hot_water_systems$3,049.00 incl. GST and installation LPG

Similar to the above, this installation is designed to accommodate a LPG installation when natural gas supply is not possible/available or too expensive.

Available with a 27 Bosch or Rheem continuous flow heater. All connections and supply of pavers also included

lpg_bottlesTo make this deal even more attractive, we will throw in 1 free bottle of LPG at a value of $150!

The installation includes all required components required to replace your existing low or mains pressure hot water cylinder. Commonly a site visit is required to ensure that placement complies with the relevant standards and safety requirements.

Ongoing gas pricing may vary but is currently trending at $80-$120 per bottle depending on your supplier. If in doubt, please ask our team about current rates prior to ordering.

 

 

Rheem_continuous_flowAll continuous flow hot water heaters included in the above deals require an electrical connection for ignition (we also offer self igniting hydro powered continuous flow heaters on request). We can offer the electrical connection at a fixed price of $350 + GST. Alternatively you are free to organise an electrician of your choice to be onsite on the day of the installation.

All installations are installed by qualified gasfitters and plumbers and come with a full Master Plumbers warranty.

We WONT be beaten on price so make sure you are quoted apples for apples. In any case claim your $50 if you do!

1960’s HJ Cooper & Sons New Market Cylinder with Hermetic element.

HJ_coopers_and_sonsWhat another great find! This Hj Coopers hot water cylinder (Pressure water heater rated to max head of 25 FT) managed to last over 50 years and was only replaced because of a new home renovation. Otherwise in pretty good shape! In the 60’s hot water cylinders had a higher content of copper. That, the additional material grade and quality manufacturing processes delivered hot water cylinders that lasted decades! What makes this find even more exciting is that the original Guarantee card was still inside the element enclosure, originally signed by the installer and dated 1965. This is museum material right there! Back of the card reads: ” This “Hermetic” element is fully guaranteed for two years from the date of purchase, as shown on other side, against faulty workmanship (this indicates that Hj Coopers used to install the cylinders themselves, whereas today manufactures don’t install and only supply)  or materials, always provided that the element has been subject to fair and reasonable use. The manufacturers will, at their discretion, repair or replace same if returned to them through the dealer from whom the element was purchased , provided the element is accompanied by this card. this guarantee does not cover element whose failure is due to liming or the building up of water impurities. No responsibility is accepted for any consequential damage arising from the use of this element.

After so many years in business HJ coopers have recently been purchased by Rinnai. Whether HJ Coopers will continue to exist as a brand, we don’t know but one thing we do know, this cylinder was certainly a high quality low pressure hot water cylinder in the 60’s! Back to the treasure hunt!

Guarantee_card cylinder_conditions

Hot water cylinder wrap (blanket)

hot_water_cylinder_wrapPlace your hand on your hot water cylinder

Is it warm? That only means one thing, you are wasting energy and wasting cash! Even if you are not using hot water, your storage hot water cylinder has a considerable storage heat loss.

Every time the water cools down below 60 degrees your element is programmed to switch on. On average even if you don’t use hot water, this may happen every hour.

The good news is..

you can do something about it!

Your solution is called a “Hot water cylinder wrap” or storage cylinder blanket. Once installed you will notice the difference on your power bill immediately.

Get your hot water cylinder wrapped up for as low as 249 + GST. Including installation and materials, we will even throw in 1 meter of insulation onto your hot water pipe so save more energy.

The wrap in made here in New Zealand and complies with AS/NZS 4859.1. With a total surface area of 5.6 sqm we are able to insulate any hot water cylinder from 135L to 180L. A minor additional cost may apply on larger style hot water cylinders. Wrap has a mean thickness of 60mm and declared thermal resistance of 1.3sqm C/W. After installation allow for 24 hours to achieve nominal stabilised thickness and; R-value .

Some advantages:

  • Keeps water hot longer.
  • Permanently fire retardant.
  • Contains up to 80% recycled glass.
  • Reduces energy costs.

Get your Electric hot water cylinder wrap today and start saving energy and money today. Call us on 0800 4 Cylinders to get your installation booked in today,

You can also book online HERE

conditions on price may apply.

Upgrading your sacrificial anode when replacing a hot water cylinder.

hot_water_cylinder_anodeHow would you like to increase the life span of your current or new hot water cylinder by at least 10 years?

Sounds too good to be true? Every hot water cylinder contains a sacrificial anode which prevents the breaking down of the tank and components. As the name suggests “sacrificial” would mean that at some point it would have to be replaced to maintain this form of protection. In the image to the right you can clearly see the difference within 10 years of operation. Most house holders are not made aware of this fact and unknowingly allow the continuation and breakdown of their relatively young or new hot water cylinder.  By replacing this sacrificial rode you can easily add another 10 years to its operation saving significant cash by preventing the breakdown of metals.

The sacrificial anode (also called an anti-corrosion rod) is typically made of magnesium. It it used to attract corrosive elements so that the tank itself will not corrode as quickly. It can be replaced when it is badly corroded.

But when your hot water cylinder is installed in a tight spot with limited height which is the case in most scenarios, how can you replace this rode (typically over 1 meter length) without actually removing / disconnecting (which would cost you more than its worth) the hot water cylinder to fit it in?

Making it easy to change a cylinder anode when clearance is tight.

When is time to replace your sacrificial anodes you might be faced with several challenges. Either HWC_Anodeyou will have to drain and remove the hot water cylinders or you may have to put a hole through the ceiling above for access. So what is the solution? A flexible Anode! this specialized anode requires less than 250mm clearance and can be installed within 1 hour. So whether you have an exiting cylinder or getting a new one, why not ask to be upgraded to one of these allowing you to make the replacement when its due? Saving you cash long term!

Please ask our team about this upgrade which can be purchased for under $200 with a new installation.

 

 

 

Hot Water Cylinder faults and problems?

If your hot water cylinder suddenly stops working (producing hot water) it’s a good Idea to go through a checklist of elimination to determine what the fault is before getting any quotes to repair or even replace your hot water cylinder. Initial understanding of what the problem is can save you lot of cash!!

WHY DON’T I HAVE HOT WATER?

If your hot water cylinder is not producing hot water, one of the reasons could be:

  • You are setup on ripple control through your current power provider. If so, your current power provider has the ability to disconnect your Hot water cylinder from the grid during peak times. Give them a ring and find out whether you are. (This is common in the Auckland area)
  • Have you checked your switchboard to see if the fuse has blown? You should be able to confirm this visually.HWC_Fuse

With all electrical fault scenarios, if you are unsure how to investigate / rectify, we strongly recommend asking a professional for assistance. This could be a registered electrician or registered plumber holding a current limited electrical certificate.

WHY HAS THE FUSE BLOWN?

If you have determined that your fuse has blown , there will be a good reason why that has happened in the first place.

This could include the following:

hot_water_cylinder_immersion_element

  • With tear and wear an immersion element will break down over time eventually causing an electrical short due to a broken circuit. This will lead to an RCD tripping (RCD’s are not common with hot water cylinder) or fuse blowing. Sometimes a new hot water cylinder element can also be faulty as shown in the image here. Within 2 hours this brand new element failed majorly causing a fuse to blow and leaving the homeowners with no hot water.
  • Every hot water cylinder incorporates a thermostat that controls the element. Thermostats are designed to ensure the immersion element switches on when the water temperature is below 60 degrees. Unlike older style thermostats, modern versions cannot be set below 60 degrees. Stipulated by law to prevent the growth of legionnaires bacteria. (for alternative systems to manage legionnaires bacteria please follow our blog for upcoming information) Thermostats may fail, turning off the element permanently. Some models incorporate an integrated trip device which can be reset. Caution is advised though because also in this case, there is a reason why the thermostat has tripped in the first place.

CAN MECHANICAL FAULTS RESULT IN “NO HOT WATER”?

Alternative to electrical faults mechanical faults may also result in your hot water cylinder not delivering hot water. The reason we say “delivering” is because your cylinder may still be “producing” hot water but delivery prevented by a different component in the system. One of these components is your tempering valve. (assuming the installation is a compliant one, for more information please visit our blog post Cheap cylinder quotes)Tempering_valve block

A tempering valve is installed to protect your household from scolding hot water. For a more legal description please download NZBC G12. Most tempering valves incorporate a non-return valve on the hot, cold or both sides (Tempering valves shall comply with NZS 4617 or AS 1357.2) which prevents the hot water from siphoning back into the cold water line. Additionally on both the hot and cold sides the tempering valve includes a miniature style strainer which catches any debris before entering the valve. This is designed to protect the valve from damage and prevent maintain clean delivery. Keeping the above in mind two things can happen with this valve that will prevent your hot water cylinder from delivering hot water to your taps.

  1. If your cylinder thermostat recently failed then your immersion element would have continued to heat your water to boiling point which can put a lot of strain onto the integral HDPE parts of the tempering valve. Standard tempering valves (not rated for high temperatures such as solar above 99 degrees) incorporate High density Polyethylene parts which are rated to about 99 degrees Celsius. At 99 degrees, depending on age these will start liquefying or breaking down. Once these parts start cooling down again they will fusion preventing further mechanical operation. In this instance we are talking about the non-return valve which will no longer open allowing hot water to travel to its destination.

apex_tempering_valve

2.  The integral miniature style strainers mentioned above have an approximate straining value of 20 microns. If you are getting a new tempering valve installed on an older system you will most likely get some of the existing lime/sludge/debris caught in the strainer which may initially look like the “pressure” has been reduced but will eventually fully clog to point of blockage.

A new installation involves new pipes, new valves and a new hot water cylinder, all of which can contain debris from the installation, transport or product itself. If the system is not flushed properly at time of the installation this will guaranteed lead to valves blocking preventing hot water delivery.

WHY IS MY HOT WATER CYLINDER OVERFLOW PIPE DRIPPING?

Every hot water cylinder, regardless, whether its mains or low pressure must have a method of cylinder_with_valvesexpansion relief. As water is heated its density will decrease requiring more space and creating more pressure. If this pressure is not managed properly your hot water cylinder could/will explode or “burst” once it reaches its maximum rated manufacturing pressure limit. Some additional factors such as incoming pressure will also affect your system pressure as a whole.

I will cover all the valves in different blog posts, for now what you need to know is that.. If the valve is “dripping” (Especially when the cytlinder then its doing what its supposed to. This includes water exiting your relief vent through the roof.

A “drip” is normal whereas as a regular stream or gush may not be. If you are experiencing a stream, gush or heavy drip some of the following reasons may apply:

  • A recent increase of pressure may have happened due to utility repairs or improvements.
  • Your hot water cylinder is over heating because the thermostat has failed.
  • On low pressure systems your incoming pressure is reduced with a pressure reducing valve. This valve may wear down over time eventually allowing more pressure through than the vacuum relief valve (the vacuum relief may also be the cause) or open vent height may be allowed for. In this case maintenance or replacement will be required.
  • On mains pressure systems, cold water expansion or temperature relief valves may be faulty, worn out or simply requiring a clean. Both valves have a lever which allows you to open and discharge hot water. Often, doing this may solve the issue as grit may be the offending cause or your excessive drip.

We have listed the most common faults above to ensure you can make an educated decision before taking any action. If you cant find information about the fault you are experiencing on our website, please don’t hesitate to call our friendly technical team at no charge.

For more information on possible faults and remedies please checkout out our most recent blog:
Your Cylinder May Just Need A Repair, Not A Replacement.

Rheem Alpha low pressure made in 1967

Rheem_AlphaHard to believe but we got called to this 48 year old Rheem Alpha hot water cylinder because a mains pressure upgrade was requested and not because it was leaking!

A typical low pressure installation with a vacuum relief valve and 15mm hot water feed to the house. No Seismic restraint or tray despite there being another property underneath. Safe-trays are a required by law in Australia but not in New Zealand if the property affected is not a separate title. We from Hot Water Cylinder NZ still believe this is good practice, ensuring that if and when a leak occurs the water can be managed and drained preventing damage to your own and others property. We are currently offering a FREE CYLINDER TRAY with every mains pressure upgrade! Call us for more info.

Rheem Mains Pressure takes the OW! out of your shower!

Rheem Delta mains Pressure

The title of this blog is what you would have found attached to your Rheem hot water cylinder in the early 90’s! A marketing endeavor designed to encourage home owners to return a questionnaire which will enable them to take advantage of the amazing Rheem warranty.

Rheem_Delta

The back of this two color compact A4 flyer which folds into a convenient sized Free-post postcard states “Please return this questionnaire/warranty. It is your advantage for us to have it on file should the need arise to make a claim. As an additional incentive, your warranty will be entered into a monthly draw to WIN AN ELECTRIC JUG OR KETTLE, A TOASTER OR AN IRON.” I do love the “toaster” classic!

Some of these questions (eight in total, some of which are designed to “paint a demographic”) include:

  • Who selected your water heater? you or your plumber?
  • Where/why has this water heater been installed?
  • What did your new water heater replace?

1990_pipe_layout

Whats also interesting is the installation diagram Rheem has attached, stating that all other valves are optional and only required as specified by the local conditions and regulations. If you look at the schematic you will also notice it does not include a tempering valve. the shower priority is correct but some of the others questionable.

Good on you Rheem for taking such an interest in your clients! For over 25 years now Rheem have been the leaders in hot water heating and they continue to lead the industry by example.

The danger of cheap hot water cylinder quotes.

wrongly_installed_hot_water_cylinderThis home owner would have been stoked to get this cylinder installed at $500 below going market price! There is a good reason why…

Often we lose out on installations because of price, home owners don’t know any better employing plumbers that happily install hot water cylinders in manner that is dangerous and inefficient to home owners.

We were called to this job which was just done recently by a local plumber, failing to follow basic building code requirements this installation resulted in overheating and damage of tap ware.

What were the requirements?

The installation was a replacing a faulty low pressure with a new low pressure hot water cylinder. the legal recommendations are very clear in this situation clearly stating that the plumber SHOULD bring this installation up to the current standard. which includes:

 

  1. Installing a tempering valve.
  2. Installing a cold water expansion valve.
  3. Installing earthquake restraints.

Non of which were done on this installation, putting this family at risk and increasing their power bill unnecessarily. Do you have a cheap quote? Before you commit, its a good idea to compare apples with apples!  Not sure? Give us a ring on 0800 4 CYLINDERS.