Author Archives: Hot Water Cylinders NZ

Do I need a hot water cylinder tray?

Whether you are getting a new hot water cylinder installed or replacing an existing one, in New Zealand the building code NZBC G12 stipulates that a safe tray must only be installed if water damage can be caused to another household making it an optional item (not a legal requirement which can be declined) for single title New Zealand homes. In comparison, in Australia this is mandatory in all cases.

We fully agree that an installation of a safe tray (also called drip tray) is good practice and should be installed under every hot water cylinder for obvious reasons. The most common reason for these not being installed on most jobs is the rejection of additional cost. In many cases between $ 250 – $750 over and above the hot water cylinder installation because a dedicated 40 mm drain pipe from the supplied tray to an approved point if discharge needs to be installed. Whether this is convenient or even possible in many cases is another question all together.

Cylinder_tray

INSURANCE, DISPUTE & THE CONSUMERS GUARANTEES ACT

We from Hot Water Cylinders Ltd recommend that a cylinder tray is installed on every installation, to prevent damage to property and maintain safety. Of course this extra cost is a nuisance, especially when you are spending an additional several thousand dollars to replace your current leaking hot water cylinder!

According to NZBC you can decline the installation of a cylinder tray but please consider the following experience:

We have recently been involved in a case where a manufacturing fault has caused damage to property. In this instance the cylinder element seal was damaged and water leaked onto carpets and through the ceiling.  The home owner naturally sought compensation from the manufacturer but the manufacturer referred to their instruction manual which states the following:

Important
All cylinders have the potential to leak water. To minimise damage to other areas of your home, ensure that your cylinder has been installed with a drip tray—the person doing the installation is responsible for this.

Drip tray/catch pan (MUST be fitted)
The warranty does not cover any consequential loss from leaks to the cylinder, so it’s important a suitably drained drip tray/catch pan is fitted.

Consequential losses
All cylinders are required to be installed with a drip tray, this is a mandatory requirement of the installation. If damage is caused by a leaking cylinder that has not been installed with a drip tray the owner can seek compensation through the installer or consider claiming on insurance.

Does this in return put the responsibility with the installer or home owner insurance??

Depending on circumstances and negligence, here are two possible scenarios that could take place, most likely in court.

  1. The Consumer guarantees Act states “You cannot contract out of the Consumer Guarantees Act when you sell goods or services to a consumer.” This means..
    > exclude or try to limit your liability under the Act in fine print
    > tell consumers to contact a third party when they have chosen to seek a remedy from you. Contracting out of the Consumer Guarantees Act means having a written agreement (or clearly stating) that the goods or services you sell are not covered by the Act.This would mean that regardless, the liability in such a case remains with the manufacturer if damage was caused by a manufacturing fault.
  2. The New Zealand building code Clause 6.11.1 of G12/AS1 states “Water heaters shall be installed in accordance with the manufacturer’s instructions” Which in this case recommended the installation of a hot water cylinder tray.

I do have a personal opinion about the above which I wont share and will only say that these two points contradict considerably and would most likely end up in a court of law if no reasonable resolution is found.

In our experience above, thankfully the damage was minor and the manufacturer agreed to cover the costs of the damage despite the wording in the installation manual which in the end was a great outcome.

The moral of the story folks is that, the best means of protection is prevention! Especially if your cylinder is being installed in a location where a leak may potentially cause damage. Hot Water Cylinders Ltd offer the best price guarantee, so why not ask for an optional quote to include this minor extra which can save you lots of hassles in future.

What is a hot water cylinder coil or heat exchanger?

hot_heater_cylinder_coils

What is a heat exchanger

The simple answer is, a coil or heat exchanger is a device that allows the transfer of heat between two fluids without having them come in contact with each other.

A standard immersion element is by default integrated into the average solar ready cylinder and is considered the primary heat source. When an external secondary heat sources such as solar, heat pumps or even gas boiler are used, most hot water cylinders will not have a heat exchanger to accommodate and potable water is heated directly within the tank.

Systems of this type (without a heat exchanger) are sometimes called “direct systems”, they can be a problem for a number of reasons:

  • The mains water may be corrosive
  • The mains water may be mineralised
  • Mains water will almost certainly have oxygen dissolved in it
  • The location where the system is used may suffer from frostscylinder_heat_exchanger

Corrosive water will attack the collector tubes, this process will be accelerated by any release of oxygen from solution in the water (gasses are less soluble in water at high temperatures). Minerals in the water will form deposits inside the collector tubes at high temperatures (in the same way that deposits are formed inside a jug or kettle). these deposits will eventually block your solar tubes, gas heat exchangers, pumps, valves and other system components.

Heat exchangers in closed loop systems are critical to the performance of the system and should be matched with the heat source (gas boiler or solar for example) being used and the flow rate through the circuit so that the heat being gained by the heat source is efficiently transferred to the potable water by the heat exchanger.

The most common type of heat exchanger is the coil heat exchanger this is integral to the storage tank, although sometimes external plate heat exchangers are used.

Here is one example of a double coil hot water cylinder which can be used for a solar system and gas boiler backup.

what_is_a_heat_exchanger

 

 

Christchurch shake affects hot water cylinder manufacturers.

4.3 magnitude earthquake in Christchurch shakes residence and hot water cylinder manufactures!

christchurch_earth_quake_damage_hwc

Yet another earthquake hits Christchurch and like every other earthquake this one leaves frustration and damage in the millions behind. Peter Cocks have been manufacturing hot water cylinders in New Zealand for decades and despite being prepared for the constant “shakes” every now and then, over 100 hot water cylinder got damaged in the quake.

This of course affects distribution throughout New Zealand, especially Auckland being the largest hot water consumer.

Peter Cocks have been recently sold to Rheem so the timing could have not been any worse/better? I suppose this will fully depend on who is looking at it 🙂

If you live in Christchurch and you are getting your hot water cylinder replaced, ensure your seismic restraint is installed correctly. This could save lives and definitely save you money even in the smallest quake. Hot water cylinders LTD have been busy helping Christchurch residence get their hot water cylinders repaired or replaced. If you are affected by the recent quakes give us a ring for immediate assistance.

We look forward to hearing more about Peter Cocks’ new venture with Rheem and will certainly keep you posted on any product advancements and updates. If you currently own a Peter Cocks hot water cylinder and are concerned about any future warranty related claims, dont be. Peter Cocks have already issued a statement guaranteeing the continuation of all warranties through the new purchaser Rheem. Peter Cocks may continue to operate under the current brand name “Peter Cocks” but only time will tell.

Jason Statham thinks Rheem is bullet proof?

I had to giggle when I watched “The One” over the weekend. An action filled story line played on a multi-dimensional level filled with clichés and “classic” acting ability from Jason Statham and Jet Li. Mimicking typical special effects introduced by the Matrix the movie keeps you anticipated right through to the last showdown between Statham and Jet-Li.
Jason_Statham_with_RheemOn a manhunt, half way through the movie, Statham decides to take cover behind a Rheem Hot water cylinder. Now, I dont know about you but knowing what these products are made of, im not sure I would feel safe standing behind one trying to dodge a bullet!

So what model Rheem is this hot water cylinder?

By its height and diameter I would say this Jason_Statham_thinkingcylinder has a minimum capacity of 250L.
Looking closely at the connections at the top one can clearly identify flow and return pipework. In total 4 connections which exclude the pressure relief valve clearly visible on the side. I would categorise this hot water cylinder within the Rheem Premier Solar and Drain-back assortment.

bullet_proof_Rheem

Further down this article you can find a technical view of how the installation setup could look like.

Some obvious Hollywood neglection.

Other than the fact that this cylinder is EMPTY and will not save your life in a fire fight, why is it not connected to look like it? If you look at the top of the tank, you can clearly identify that it’s fully disconnected with a “stubby” for a hot water outlet. Do you think they upgraded to instant gas and the plumber forgot to take it away or did Hollywood reject the plumbers quote (I would hate to know how much they charge stars for plumbing works) to temporarily provide a “working” hot water cylinder which is full of water making the bullet proofing scene more realistic? I will leave the answer to your imagination! I guess you will just have to watch THE ONE.

After writing this article I have decided to take one of these hot water cylinders into the bush and introduce it to my 308 Browning. We will see how bullet proof a hot water cylinder can be. I will be updating you very soon with a video and some results, you never know, one day a Rheem may save your life!

Rheem_drainback_solar_storage

 

Low pressure after installing mains pressure?

cylinder_blockageHow would you feel if you just had your low pressure hot water cylinder upgraded with a mains pressure to only get the same low pressure you had before? Not happy, right?!

I thought this story was interesting because it tends to happen very often and we from Hot water cylinders ltd end up getting the phone calls to investigate and repair. In this scenario some cylinder guy replaced the hot water cylinder and forgot to remove the transport thread protection, completing the installation with this inserted into the pipe. After the installation was complete this “bung” found its way to the valve blocking any flow of water. the poor home owner was not sure what to think of it for over 4 weeks and put up with the low pressure thinking it may have been normal until he picked up the phone and made the call.. “Uhm.. excuse me.. if I have a mains pressure cylinder should it be dribbling out of my shower head?”  Well.. NO of course not.

Mistakes made by Noobs are fixed by professionals. Want to learn more bout LP cylinders? Click here for information about low pressure hot water cylinders.

OTHER REASONS YOU MAY HAVE LOW PRESSURE AFTER A MAINS PRESSURE INSTALLATION INCLUDE:

  • The non return valve was installed incorrectly (opposite way in reverse)
  • Debris from the installation found its way to the strainer in the tempering valve blocking flow
  • Transport bungs are not removed
  • The incoming diffuser has accidentally been pushed into the tank causing a blockage
  • Pipework is kinked restricting flow
  • Pipework badly brazed restricting flow
  • Pipework badly crimped restricting flow

Not sure what the issue is? Please give us a ring and we will help you get to the bottom of it!

 

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.