regulation roundup - issue 45 - march 2020 · of regulation roundup. roadshow 20 neca sa/nt 2020...

Plumbing Bulletin 22

IN THIS ISSUEMessage from the

Technical RegulatorWelcome to the 45th edition

of Regulation Roundup.

Roadshow 20NECA SA/NT 2020

Roadshow Seminar Series

A bulletin for electrical, gas and plumbing industry workers brought to you by the Office of the Technical Regulator

be energy safe www.sa.gov.au/otr

FOR TECHNICAL ENQUIRIES:ElectricalP: (08) 8226 5518 | (8:00am – 4:30pm)

GasP: (08) 8226 5722 | (8:00am – 4:30pm)

PlumbingP: 1300 760 311 | (8:30am – 4:30pm)

REGULATION ROUNDUP ISSUE 45 | March 2020

Electrical Bulletin 4

Gas Bulletin 123

In this issueMessage from the Technical Regulator 2Electrical Bulletin 4Existing non-compliant electrical work 4Segregation of different voltage levels 7RCD protection of all final sub circuits 7Read the instructions! 8Backup circuit arrangement 8Earth Electrode Clearances 8Electric Shock Report Incidents 9OTR Electrical Expiations 10AS/NZS3000:2018 Wiring Rules – Amendment 1 10Public Warning Notice 11

Gas Bulletin 12Material Failures 122020 Gas Roadshow 13Commissioning Type A Gas Appliances, Hang and Wad Meter Fixes and Spillage Testing 14The pressure’s on! 15Commissioning LPG appliances 15Installing gas appliances 16Are you working on un-certified appliances? 17Complex gas installation 18LPG installations 19Product Safety Recall 20Audit feedback 21

Central heater installations in roof spaces 21Plumbing Bulletin 22Plumbing Roadshows 2020 22Plumbing Advisory Note - Tundish connections 23Plumbing Advisory Note - Advice to Property Owner 25Publication of Standard for Dual Reticulation Infrastructure 26Infrastructure Standard 27Wayne Bennetts Retires 27Contact list 28

Welcome to issue 45 of Regulation Roundup. We are again approaching the roadshow seminar series. I would encourage all of you to try to get along to one of these sessions while we try to cover all the topical issues in Regulation Roundup.

It’s always great to be able to catch up in person to ask any questions you may have. In this edition of RR, I note we are exploring several issues we are finding with the installation of battery storage systems. Please take note of these if you are in this part of the industry. The latest update in Standards impacting on this sector will also be covered off at the roadshow. We also devote a section discussing in detail the installation and commissioning of gas appliances.

This is a must read for those in the gas installation industry. It can help you avoid any problems that would require rectification. In the water industry we highlight a number of issues where we have published advisory notes for the industry. Once again, I encourage you to take the time to have a read of Regulation Roundup and trust it is of use to you.

Robert Faunt, Technical Regulator

Message from the Technical Regulator

Welcome to issue 45 of Regulation Roundup.

REGULATION ROUNDUP | 3

SEMINAR SERIES ANNIVERSARY

ROAD SHOW

NECA SA/NT will be running their 2020 Roadshow Seminar Series across South Australia in March, April and May and we encourage all electrical contractors and workers to attend and find out the latest developments within the industry. The seminars will cover updates to Australian Standards, Solar and Battery Storage, the Service and Installation Rules, NECA’s new HSEQ Digital product and much more.

S A / N T C H A P T E R

For further information or assistance please phone NECA SA/NT on (08) 8272 2966 or visit www.neca.asn.au/sa

CALLING ALL ELECTRICIANS

REGISTER

Don’t miss out on our 20th Anniversary year! To attend for the NECA 2020 Roadshow Seminar Series, please register via Eventbrite at: https://www.eventbrite.com.au/e/neca-sant-2020-roadshow-seminar-series-registration-83098934149?aff=RegRoundup

Alternatively, you can visit our website and download the hard copy registration form: https://neca.asn.au/sa/content/2020-roadshow-seminar-series.

This annual seminar series is a significant training resource for the electrotechnology industry. The event this year is designed to provide licensed electricians with a greater understanding of the following topics:

• NECA SA/NT on our new HSEQ Digital product

• MATES in Construction on Tradies Mental Health

• SA Power Networks on changes to the Service and Installation Rules

• Office of the Technical Regulator on updates to the Australian Standards including ‘Battery Storage’, ‘Transportable Structures’ and ‘Construction and Demolition Sites’, the new DER Register requirements for Solar installers, and other updates and FAQ’s.

This year NECA are celebrating running the Annual Roadshow Seminar Series for 20 years! This means the seminars will be even bigger and better than before, with extra prizes, giveaways and more. It will be an event not to be missed!

Thanks to the Office of the Technical Regulator, SA Power Networks and MATES in Construction for their support and involvement in this initiative.

NECA have nominated Mates in Construction to be our charity of choice for the 2020 Roadshow Seminar Series.

There will be donation tins available at each seminar, and more information will be provided on MIC, the fantastic work they are doing for the construction industry and why they need our help.

Suppliers, manufacturers and wholesalers will be on location with their new products and service displays and NECA SA/NT staff will also be on hand to answer your questions about what NECA can do for you and your business.


Immediately dangerous

Existing non-compliant electrical workSeveral electricians have raised concerns about what to do if they find existing non-compliant electrical work.As with the previous paper certificates, the new electronic certificates of compliance (eCoCs) have Section B, which is used to warn the property owner of any existing electrical non-compliance that an electrician identifies.Electricians are not responsible for electrical work previously done by others however they have a duty of care to warn the property owner/occupier of any non-compliance that they happen to identify. Under Section 60 of the Electricity Act, owners & operators of electrical installations must take reasonable steps to ensure that their electrical installation is safe, and safely operated.If you come across non-compliant electrical work, ask the owner if they want you to rectify it. If they agree, rectify the work and list it in Section A on your eCoC as work you have carried out. Do not then also list it on the eCoC as a defect in Section B, as you have already fixed it. If they say no, then write what you have found in Section B on your eCoC. Section B gives 5 categories for the electrical installation. Refer to the examples shown below. Any option other than None Observed requires the electrician to describe the non-compliant work.

Electrical Bulletin

NOTE: If you select immediately dangerous, you will then be given a screen prompt requiring you to ring OTR immediately. OTR will then step you through what is required to make it safe.

[ Exposed live conductors. ] [ Exposed live terminals. ]


[ Existing non-compliant electrical work ... ]

Potentially dangerous

Non-compliant

[ Earth bar used as active link, in breach of clause 1.7.1(c) AS/NZS 3000:2018. ] [ Main switchboard enclosure is not earthed, in breach of clause 5.4 of AS/NZS 3000:2018. ]

[ Connection to earth electrode is not protected against corrosion and has no warning label in breach of clauses 5.5.1.2 and 5.5.1.3 of AS/NZS 3000:2018. ]

[ Meter isolator is not also labeled ‘MAIN SWITCH’, in breach of clause 7.5 of the SA Power Networks Service and Installation Rules. ]


Recommendations are not for identified non-compliance. They are for where you believe that the electrical installation could be:

[ Existing electrical installations ... ]

Recommend

• made safer, such as upgrading an existing old switchboard

• Replace existing old ‘Cap and Casing’ wiring system in house.

• neater, where it is obvious that the previous electrician did not own a spirit level.

None observedWriting “none observed” on your eCoC does not make you responsible for the existing electrical installation. All it is saying is that, whilst carrying out the electrical work listed in Section A on your eCoC, you did not identify any non-compliance.

or


[ This extra-low voltage cable is only rated for 30 V and does not have sufficient segregation from single insulated low voltage cables. ]

Cables of low voltage circuits and cables of extra-low voltage circuits shall only be enclosed in the same wiring system where one of the following arrangements is employed:

a. The low voltage cables are of a type providing the equivalent of double insulation.

b. All cables or each conductor of a multi-core cable are insulated for the highest voltage present.

c. The low voltage cables are installed in a separate compartment of a common cable trunking system, having fixed and continuous barriers between compartments.

Segregation of different voltage levelsWhere a solar and/or battery

system has an extra-low voltage interconnection cable installed

in association with low voltage wiring, appropriate segregation must be maintained.

AS/NZS 3000 clause 3.9.8.3 states that:

[ Excess sheath has been stripped back on extra-low voltage cable, and has impaired its insulated voltage rating. ]

[

[ Metering device final sub circuit is not RCD protected. ]

OTR are finding many separate “control circuits” in residential installations that are not being RCD protected. These circuits are final sub circuits and shall be protected as such. AS/NZS 3000 clause 2.6.3.2.2 states that: Additional protection by RCDs with a maximum rated residual current of 30 mA shall be provided for all final sub circuits in domestic and residential electrical installations.

RCD protection of all final sub circuits


When RCDs are installed to protect electrical installation connected loads on a stand-alone port of a multiple mode inverter, they shall be of a type that correctly operates on the standalone port output waveform and be in accordance with the requirements specified by the manufacturer for use with the inverter.

Read the instructions!

[ Here is an example of 2 RCD’s of the same make, however they are different types. One is a type AC RCD and one is a type A RCD. The manufacturer of the multi mode inverter may specify only one type of RCD to be used. ]

Backup circuit arrangementIt’s important to arrange your backup circuits in a manner

that is easy to understand. Anyone should be able to open a switchboard and isolate everything safely without it being

too confusing. AS/NZS 4777.1 clause 5.4.3 states: a multiple mode IES with stand-alone functionality, the final sub-circuits of the multiple mode inverter should be located in a separate

stand-alone supply load centre or distribution switchboard. Where the stand-alone supply is used as an alternative supply for the electrical installation, the alternative supply arrangements of AS/NZS 3000 shall be applied. All sources of supply associated with multiple mode IES shall be clearly identified and uniquely labelled.

Type AC Type A

[ Earth electrode too close to a gas service. ] [ Earth electrode too close to a water service. ]

AS/NZS 3000:2018 Clause 5.3.6.4 (b) states that earth electrodes must maintain separation from conductive enclosures of other buried services. The Clause also gives reference to table 3.7, which gives minimum separation of underground services. In most cases you will find the minimum separation is at least 500mm to other conductive services such as water and gas.

During our investigations, electricians are telling us they installed the electrode at the beginning of the construction prior to the gas and water pipes, so did not cause the breach. While this may be true, the breach still exists on the property. Our advice is to be aware and install the electrode well clear of where other services are required to be installed later, as the builder will need to choose which tradie needs to relocate their service, they usually call the sparky.

Earth Electrode Clearances


Shock Source Cause Contributing Factors Injuries Action to Make Safe

Cable installed in roof space.

Cable was not terminated and was believed to be redundant.

Apprentice plumber brushed hand past this cable whilst working in roof space.

Electric shock received to right hand.

Electrical contractor isolated area and terminated cables as required.

Christmas Tree decoration.

Flexible cord had damaged insulation.

Worker went to check why Christmas lights did not work and when unplugging them contacted live exposed conductors.

Electric shock to left hand.

Item removed and danger tagged out of service. Worksite procedures reviewed.

Terminals of air-conditioner.

Isolators not adequately labelled.

Refrigeration workers hand brushed against terminals of air conditioner that was supposedly isolated.

Worker received electric shock to hand.

Review of isolating procedures required, and correct labelling installed.

Kitchen taps. Neutral conductor pulled out of “over to under” service fuse connection.

Homeowner using kitchen taps received electric shock unaware that fencing contractor had damaged consumers mains neutral conductor.

Homeowner received electric shock to hand.

Network operator isolated supply until electrical contractor completed repairs.

Underground street mains cable.

Star dropper had been driven into underground street mains cable.

Building site worker contacted the now live star dropper unaware it had damaged the street mains.

Electric shock between hand and foot.

Network Operator isolated street mains to effect repairs. Builder to review site procedures.

Lighting cable. New checker plate flooring had been installed.

Workers had inadvertently cut through conduit and cable when renewing walkway.

Worker received electric shock to right hand.

Circuit isolated and conductor repaired. Site procedures to be reviewed to eliminate reoccurrence.

Bread toaster. Toast was stuck and could not be dislodged.

Hospitality assistant decide to use metal food tongs to remove toast whilst toaster still energised.

Worker received electric shock between left hand and right foot.

Safe work procedures reviewed with worker. Toaster removed form service and replaced with new one.

Lighting circuit. Lighting circuit was damaged resulting in roof and water pipes becoming live.

Plumber received initial shock picking up metal bar from ground then again from the water pipes.

Worker received electric shocks to right hand.

Network Operator attended and isolated lighting circuit which resolved issue. Electrical Contractor to repair.

Mains connected smoke detector.

Worker was irritated by sounding smoke alarm and attempted to unplug it.

Worker did not realise that when the cover is removed live mains connections can be contacted.


Electrical contractor attended and replaced smoke alarm. Work site policies reviewed.

PV Array. Plugin style connector failed.

Connector between solar panels had overheated exposing live parts which came into contact with metal roof.

Homeowner received electric shock to hands when using aluminium ladder to access roof.

Network operator isolated solar system and Electrical Contractor repaired fault.

Laundry trough. Reverse polarity of submain cable.

XLPE cable reduced in size to facilitate connection at domestic switchboard had not been tested correctly.

Homeowner received electric shock between hands.

Network Operator disconnected supply until Electrical contractor could complete repairs.

Cable in conduit on roof.

Roofing worker damaged cable.

Worker was using grinder to remove roof sheets when it kicked back and cut through cable conduit system.

Roofing worker received electric shock to hands.

Electrical Contractor isolated and repaired cable. Work policies revised.

Switchboard busbars.

Electrical worker failed to isolate switchboard.

Electrical worker was installing new cable into live switchboard when they contacted live busbar.

Worker received electric shock across arm.

Isolation procedure reviewed after electrical worker failed to isolate switchboard before attempting to work on it.

Classroom socket outlet.

Paper clip in socket outlet.

Student decide to push paper clip into socket outlet to see what would happen.

Student received electric shock and burns to hand.

School to review student supervision. Electrical contractor replaced socket outlet.

Milk fridge. Live terminals behind switch panel.

Restaurant worker decided to remove switch cover of faulty fridge in an attempt to repair loose wire.


Electrical contractor removed fridge from service. Site procedures reviewed.

[ Electric Shock Report Incidents ]


OTR electrical expiations issued since the last edition of Regulation Roundup

Person Non-Compliance BreachExpiation Fee + Levy

Contractor Unauthorised removal & reinstatement of electricity meter–meter panel upgrade

Section 59 (1) Electricity Act 1996 $375

Contractor Ongoing repeated non-compliance–installation of new domestic dwelling

Section 61 (1) (a) Electricity Act 1996 $375

Contractor Ongoing repeated non-compliance–installation of new domestic dwelling


Contractor Owner or operator was not issued with an electronic certificate of compliance

Section 61 (1) (c) Electricity Act 1996 $375

Contractor Failure to comply with a direction–reconnection of solar installation without approval

Section 62 (4) (c) Electricity Act 1996 $1,060

Contractor Failure to comply with a direction–reconnection of solar installation without approval

Section 62 (4) (c) Electricity Act 1996 $1,060

ContractorMultiple breaches identified–installation of solar system

Examinations and tests not fully carried out as required

Section 61 (1) (a) Electricity Act 1996

Section 61 (1) (b) Electricity Act 1996

$375

$375

Contractor Contact with overhead power lines using elevated machinery Regulation 92 Electricity (General) Regulations 2012

$375

Contractor No RCD installed on a final subcircuit–residential/domestic installation


Contractor No earthing of PV panels and array mounting frames–installation of large solar farm










Contractor Multiple breaches identified–installation of generator back up supply




Contractor Multiple breaches identified–renovations to existing domestic dwelling


A total of 23 Owner/Occupiers were expiated for failing to ensure a compliant and safe electrical installation Under Section 60 (1b) of the Electricity Act 1996

Published 31/01/2020

This amendment is mainly for fixing up grammatical errors – full stops, commas, ands & ors etc.

A few changes/additions include:

Call up of AS/NZS5139 Electrical installations – Safety of battery systems for use with power conversion equipment, this new Standard becomes mandatory on 31st of July 2020.

New requirement, clause 4.1.5 Air Extraction system.

Air extraction systems may adversely affect the safe operation of combustion appliances, including those in other rooms, potentially resulting in carbon monoxide poisoning.

Your responsibility as the exhaust fan installer is to advise your customer to have their flued combustion appliances tested by a competent person to ensure correct operation, the eCOC can be used for this purpose and it provides a record of your advice.

AS/NZS3000:2018 Wiring Rules – Amendment 1


PUBLIC WARNING NOTICE POTENTIALLY DANGEROUS ELECTRICAL WORK

In October 2019 The OTR issued a public warning in the Adelaide Advertiser and other regional papers. (see below). Action has been taken against the contractor under the Electricity Act and against the contractors electrical licence and electrical workers registration under the PGE Act.

ELECTRICIANS PENALISED AFTER NEGLIGENT WORKWilliam Zachary Cook and Matthew James Tonkin admitted to allegations of improper, unlawful and negligent conduct in the District Court after the Commissioner for Consumer Affairs filed a complaint under the Plumbers, Gas Fitters and Electricians Act 1995.

Cook was subcontracted by Tonkins Electrical to perform a switchboard upgrade for a solar installation at the property.

Cook entered a SA Power Networks service pit without authority to disconnect the power to the property and broke security seals on the electricity meters.

When reconnecting the power, he transposed the active and neutral conductors which put mains voltage on the earthing system, causing all taps, sinks and earthed appliances to be at full voltage of 240V.

The home owner subsequently suffered a serious electrical shock from his garden tap and despite reporting the shock to both Cook and Tonkin, neither returned to address the fault.

Judge Patrick O’Sullivan disqualified Cook from being licenced as an electrical worker and contractor until he completes retraining and the Commissioner considers him to be a fit and proper person to be licenced.

He also reprimanded and fined Tonkin $8,000.

In his judgement, Judge O’Sullivan was particularly concerned that Tonkin had pre-signed the certificate of compliance for electrical work before it had actually been completed.

Commissioner for Consumer Affairs Dini Soulio said he hoped this incident would serve as a warning to other tradespeople to not cut corners and to take adequate remedial action quickly.

“All electricians know that both the contractor and the tradesperson carrying out the work must certify that finished electrical work is compliant with electrical standards–pre-signing a certificate of compliance is simply unacceptable,” he said.

“Slapdash work can be incredibly dangerous in any line of work, but especially in relation to anything electrical. It is sheer luck that this incident didn’t result in a death.

“Tradespeople in all fields are responsible for ensuring their work is compliant and taking corrective action as soon as possible after an issue is identified.”

Fancy a career change?Here is your opportunity to give back and further develop a better electrical industry for all. With your experience that you have developed over the years, YOU could be the one we need to complete our team. Keep an eye out on “Seek” and “I work for SA” in the coming weeks to seek a new career in the Electrical section of the Office of the Technical Regulator.


Gas Bulletin

[ Material Failures ]Perfect example of why underground services, (water and gas) must be laid with the correct clearance, depth of cover and quality of backfill.

The above photo shows a 40 mm PE water service laying straight over a 50 mm copper gas service in a shallow trench with original fill incorporating stones and grit. The services were laid shallow, under pavers in a trafficable area subject to point loading from parked vehicles.

Over time, sharp edges from the stones and grit backfill imprinted into the soft PE plastic water service. This introduced concentration points that allowed hoop stress from the mains pressure water to propagate a crack. A fine high-pressure spray of water then impinged directly onto the adjacent copper gas line. In doing so the water spray carried granular backfill to wear a hole in the gas pipe and allow water to then fill the consumer gas line.

The inlet gas supply to this site was verified to be medium pressure and water free and the gas meter was clear. The fault in this case lay within the consumer low pressure gas installation. Investigations included testing the PH of the contaminant water against the pool water to eliminate the pool water due to the PH differences. In the end the contractor had to start at the pool heater branch line, lift the pavers and dig up the service slowly until the above fault was exposed.

The cost of this was significant and may well end up in court for litigation. The original installers failed to meet their obligations in installing water and gas pipes in a compliant manner to meet the gas and plumbing standards.


The correct minimum depth of cover for private property is 300 mm for non-trafficable areas and 450 mm where the area is trafficable. Backfill and bedding for consumer gas pipes should not have adverse effects on pipes or their coatings and be stone free within 75 mm of pipes. Bedding and backfill should be compacted to minimize subsidence and damage to services. Marker tapes should be used to identify buried plastic services below.

At least 100 mm of separation must be provided between underground consumer gas piping and other services under 65 mm diameter and 300 mm separation where those services exceed 65 mm.

2020 Gas RoadshowsThe OTR gas inspectorate will look at presenting

Gas Roadshows later in 2020 or early 2021, after the new fully revised AS/NZS 5601 part 1 and 2 Standards are published. By that stage the

existing 2013 editions will be at least 8 years old and well in need of revision to keep up with

new and evolving materials, work practices and regulations. The OTR Gas Roadshows will focus

on some of the significant additions / changes to the standard. Gas contractors and workers are encouraged to attend and then update their standards. The OTR will advise the trade of proposed Gas Roadshow dates through the eCoC portal via pop up messages after the standard is published.


Commissioning Type A Gas Appliances, Hang and Wad Meter Fixes and Spillage Testing

If a licensed gas contractor or worker installs additional or replacement type A gas appliances to an existing installation, having gas on the premises, they must ensure that the appliance installation, pressure testing, purging and commissioning are complete to manufacturer / AS/NZS 5601 Standards.In this situation the installer commissions the appliance and performs spillage testing on any internal model open flued gas appliances as per Appendix R in AS/NZS 5601 before instructing the customer and handing the appliance over.

If the installation is yet to receive gas, it may be delivered by an APA accredited installer when they finish the installation before commissioning. Alternatively if the gas contractor / installer is not accredited by APA to remove the wad to enable gas to the installation, gas will be provided by an APA meter fixer performing a couple light and check/meter fix.

AS/NZS 5601.1 in Clause 6.11.2 states that, ‘where gas is not available at the time of installation, the authorised person that makes gas available, commissions the appliance’.

In terms of new gas connections to existing homes or new homes under construction, eligible installations performed by APA accredited gas contractors, are generally provided with an inlet connection and a hang and wad meter when the property is connected to the gas distribution network.

As the APA accredited gas contractor completes their installation and mandatory tests, they follow the agreed APA procedure to perform safety tests, remove the wad, purge and commission the installation before issuing a copy of the eCoC to the client.

Guidelines for assessing / commissioning installations can be found in Appendix Q. Generic appliance commissioning guides can also be found in Appendix O. It is mandatory to ensure that gas appliances are commissioned as per manufacturer / AS/NZS 5601 requirements.

This is to ensure that appliance warranty is upheld and minimize installer liability associated with product failures due to incorrect installation or commissioning. Commissioning type A gas appliances must include spillage testing for all internal model open flued gas appliances as per Appendix R.

Gas contractors and workers not accredited to receive hang and wad gas meters will not have gas available to them at the time of installation. They are required to complete their installation and perform necessary tests before issuing a gas eCoC copy to the client / entity that requests the meter fix.

Once the meter fix request is made through a retailer, an APA meter fixer will attend the site and perform applicable safety tests, i.e. (visual inspection and pressure test for soundness), to evaluate the compliance of the installation prior to connecting a gas meter and purging. Commissioning of gas appliances is then performed except for complex appliances such as:

• pool heaters

• spa heaters

• central heaters

• type A gas engines and

• certain decorative effect log fires.

Note: complex appliance commissioning is the responsibility of the fitter.

Complex appliances will be turned off because of the specialised nature of the equipment or expertise required to commission them. In those cases, the consumer is advised not to use those appliances until the installer returns and commissions the complex appliances according to the manufacturer and AS/NZS 5601 requirements and issues an eCoC.

APA meter fixers will purge gas to open flued gas appliances, ignite the burners and set operating pressures, make any necessary burner adjustments etc. as required but they will not perform spillage testing as per Appendix R. This is the responsibility of the installer who must make allowances for this.

If you perform installation work and you are not accredited by APA Group to remove meter wads on hang and wad meters, you can contact the APA Group Training Group at [email protected] to arrange accreditation training.

Becoming accredited will allow you to complete your second fix installations, gas up and commission the installation whilst performing the mandatory spillage testing on internal model open flued gas appliances in the 1 visit to save time and inconvenience for all.

mailto:apalearningsolutions%40apa.com.au?subject=


The pressure’s on! Standing /Static/lock up pressure, what’s the difference and what do they mean? Truth is, there is no real

difference, they are just different names for the same condition. This

is the recorded pressure in the gas system when all gas appliances

are turned off and nothing is operating. The regulator has “locked up” and the flow of gas

has ceased.

Working pressure. Working pressure is the pressure taken as

close to the appliance as possible or at the inlet of gas valve while the appliance is “working” and gas is flowing at full rate. This measures the pressure in the piping system under flow conditions and will indicate the nominal drop in pressure. You should run all gas appliances at full rate simultaneously to get an accurate working supply pressure at each appliance. Flames may “bounce” or even go out if the working pressure

is incorrect. If the required pressure at these points cannot be achieved, then you will need to investigate why. It could be several issues causing this problem.

• Inadequate pipe sizing (most common, due to additional load or mis-reading pipe sizing charts

• Blockage in the piping/damaged/kinked pipe/hose

• Obstructions in gas mains, meter or regulator

• Gas meter assembly or regulator undersized for the full load required

• Demand increased with the addition of new appliances without upgrading consumer pipes

As per Table 5.1 of AS5601.1:2013 the minimum (working) pressure at the appliance inlet should be:

1. NG, SNG 1.13kPa

2. LPG 2.75kPa

Burner pressure. Burner pressure is the pressure the appliance has been designed to run at, this pressure is usually taken at or near the burner or at the outlet of the gas control/valve and is nominated by the manufacturer. This information can usually be found on the data badge or in the manufacturer’s instructions. If you don’t have either resource, contact the manufacturer, they should be able to give you this information… don’t guess it. Failure to set the burner pressure to the manufacturer’s instructions may result in the appliance not working reliably or efficiently. This could also result in incomplete combustion, sooting or damage of the appliance.

[ Commissioning LPG appliances ]Gas fitters who install gas appliances / installations that source gas from, LPG cylinders or tanks are responsible for commissioning those appliances. In this case, appliance commissioning is not the responsibility of the LPG gas supplier/delivery company.

Commissioning LPG installations can be accomplished in many cases by the gas contractor connecting their own 9 or 30 kg LPG cylinder to allow purging and commissioning of the appliances after the contractor has satisfactorily completed pressure testing.

Once appliances are commissioned, the contractor can remove their LPG cylinder and tape up the POL fittings to limit the ingress of air before issuing a gas eCoC to the client and gas supplier. The gas supplier can then deliver and commence supplying gas once they have a gas eCoC that certifies the installation as compliant.

Installations that have type B appliances shall be commissioned in accordance with the requirements of the Technical Regulator and by a person meeting the requirements of the Technical Regulator. Submissions to a type B certifier should be made before the installation or commissioning commences.

To get temporary gas for commissioning the following needs to be done.

• A commissioning letter from the type B certifier once they have reviewed the appliance design satisfactorily against AS 3814, and

• A submission to the OTR for complex/elevated pressure gas installations

• A certificate of compliance from the gas contractor covering gas pipe work, flueing, ventilation and pressure testing as per the requirements of AS/NZS 5601.

Once the above is satisfactorily completed, the gas supplier can provide a limited quantity of ‘commissioning gas’ into the in-situ tanks for commissioning purposes. Once commissioning and type B testing are both completed, the authorised type B certifier will issue a type B certificate of compliance to certify the type B appliance. When the client has this the equipment can be used commercially and the gas supplier can commercially supply gas.


If you remove a natural draught space heater to replace the unit whilst using the existing flue, you will need to check the condition of the flue to ensure it is fit for purpose. If there are issues with the current installation standards, then you need to modify the installation to conform. Issues may include flue terminal location and flue proximity to combustibles.

The same goes for installing freestanding cookers, if the flexible hose connection or method of cooker stabilisation is incorrect, you need to bring them up to date.

When encountering Hot Water Heaters in non-compliant locations due to structures enclosing the appliance after it was

installed, you need to inform the customer that the installation must be modified to a compliant state. This may entail modifying the area, installing an indoor model appliance or relocating the existing unit to a compliant location.

The old excuse “It’s been like that for years mate” doesn’t make it right.

Too often, OTR inspectors are auditing new gas appliance that have been installed with existing infrastructure that doesn’t meet today’s standards because the relevant changes haven’t been made during the new installation stage.

Installing gas appliances

[ Original HWH was enclosed after installation, the gas fitter installed the new CFHWS in same location> it should have been relocated or an internal model used. ]

[ Pipework entering house from low level and connected to original gas cooker. New cooker installed and piping not modified or hose restraint chain fitted. ]


All Type A or Type B (Domestic, Commercial and Industrial) appliances are required to be certified for use in Australia. As a licenced gas worker, you have a responsibility to ensure the appliance you are working on is appropriately certified prior to installing, converting, repairing or servicing. If you have not been able to find any certification labels (examples below), then this must be raised with the owners. Advise them that further operation of the appliance will be in breach of the Gas Act and may invalidate commercial insurance. You can then work with the owners to arrange to have the appliance certified.

If the owner choses to not comply with this requirement, then the appliance must be made safe and an Immediately Dangerous Report (IDR) made through the eCoC system.

You can contact OTR Gas Safety for assistance on 8429 3466, as we have access to certification records of type appliances. We also can conduct a search on the GTRC website for approved Type A appliances and components http://www.gtrc.gov.au/

Failing to find a certification label is one obvious sign, another tell-tale sign the appliance is not certified is it not having

a marking plate fitted with the basic technical details for installation, commissioning and servicing. The marking plate should at least have the manufacturer details i.e. model, serial number, type of gas, operating gas pressures and gas rating. Not having this information will make it hard for you to commission or service appliances with confidence it has been set up to perform correctly, placing the appliance at risk of damage and injury to persons.

See photos below of an uncertified appliance with no marking plate details that recently exploded damaging the appliance, fortunately no-one was injured. A joint investigation is currently being performed by the OTR and Safe Work SA.

Type A appliance must comply with any requirements under the Energy Products (Safety and Efficiency) Act 2000 relating to certification and labelling.

Type B appliance must have had examinations and tests carried out, in accordance with AS 3814 and AS/NZS 5601 and a certificate provided by an authorised certifier.

[ Are you working on un-certified appliances? ]

Type A certification Labels:

Type B certification Labels:

http://www.gtrc.gov.au/

http://www.gtrc.gov.au/


Complex Gas InstallationComplex Gas Installations are installations that either exceed 30lt in capacity, operate at elevated pressures above 3 kPa, or contain Type B appliances.A classic example is commercial work that operates at multiple pressures or includes transitions to multiple types of pipework, i.e. PE, copper, galvanised steel pipe, composite on a Commercial or Industrial application. This also includes high rise buildings as per Appendix K, AS/NZS 5601.1:2013.

Complex gas installations require submissions to the OTR for the installation at the design stage so OTR can evaluate

if the proposed installation conforms before installation work is performed. It is much easier to make changes in design rather than after installation is complete particularly if alterations must be made to achieve compliance.

If Type B appliances are involved, Type B submissions must be provided to accredited Type B certifiers as per AS 3814. Type B gas appliances must not be operated commercially unless they are certified as per the Gas Act. Operating uncertified gas appliances may invalidate commercial insurance and is a breach of the Gas Act.

For assistance with submissions for Type B or complex installations please contact the OTR on 84293466.


All fixed gas installations must ensure they provide the required supply pressure, flow rates and adequate over pressure protection (OPP).

The photo below shows the use of a single stage gas regulator and flexible hose which

is designed for connecting directly to one portable outdoor appliance. This

regulator does not have the adequate OPP to protect the gas service and appliances from excessive pressures

upon failure. AS/NZS5601 calls for a maximum of 14 kPa OPP on second

stage services. The regulator pictured will struggle to provide sufficient gas flow for

multiple gas appliances operating together. There is also no test point to measure pressure settings.

This installation must have had an integral 2 stage regulation system, where it reduces high pressure to medium (1750 kPa to 70 kPa) and medium to low (70 kPa to 2.75 kPa), with an EOP of 14 kPa to the outlet supply.

LPG installations


What are the defects?During use on gas, hot water services with the defect may emit carbon monoxide into the caravan or motor home.

What are the hazards?If the unit is powered by gas and is operated in an enclosed area – such as caravan or motorhome–carbon monoxide may spill into the vehicle and poisoning could occur resulting in serious illness, injury or death.

What should consumers do?Consumers should immediately check if their appliance is affected and if so, cease using the appliance powered by gas. (Consumers may continue to use the appliance if powered by electricity only.)

Consumers with affected appliances should contact Coast RV’s dedicated recall hotline on 02 9645 7685 to register their details to be advised of remedial actions when they are available as the remedial process has not yet been finalized.

To identify affected appliances: open the exterior access door to the hot water service and check the model and serial number located on the right-hand side.

Affected Model numbers are SW6DEA, SW6DA, SW4DEA, SW4DA, SW4DECA and SW6DECA with serial numbers between 181315552 and 193002648 (some serial numbers may end with a ‘D’), 8183311827 and 8190201139.

Repaired units will be labelled. If you see a label next to the model/serial number that says CTC001 the inspection has already been completed and the appliance can continue to be used.

If the label is not present and the appliance falls under this recall you must discontinue use of the hot water service on gas and seek inspection and repair.


It’s not OK to install a HWS in a non-compliant location simply because it was there when you replaced it. The Gas Act 1997 and AS/NZS 5601 Standards require the installer to ensure the work carried out is up to the current Standards at the time of installation. If it is wrong, then it is up to you as the installer to correct it.

Audit feedback

Examples of prohibited fittings on gas lines. Olive Kinko fittings have been prohibited for over 30 years yet we still find them on gas installations today. Whenever they are encountered, the first thing our inspectors do is check the licensing status of the installer because gas fitters should know these fittings are prohibited.

Unlicenced installers are referred to CBS for action under the PGE Act 1995.

[ Central heater installations in roof spaces ]The gas installation standard requires gas appliances installed in the roof space to be provided with a permanent fixed means of access as per clause 6.3.11 to enable lighting and servicing.

When the appliance is beyond the extent of normal steps or ladders, a walkway shall be provided from the access point to the appliance and extend around the appliance where access may be required for lighting or servicing. The walkway shall be —

(i) at least 600 mm wide from the access point to the appliance;

(ii) where required around the appliance, at least 750 mm to form a service platform;

(iii) permanently fixed to the building; and

(iv) capable of supporting the weight of a person.

Clearances stated in the manufacturer’s installation instructions shall be observed, to provide adequate access

for servicing and removal of burners, fans, and any other components. Ducting shall not reduce such clearances or intrude on the walkway.

Alternatively, if it’s not possible to install the walkway from the existing access point, install a new access point adjacent to the central heater that allows unimpeded access to the appliance for servicing. The light switch will need to be relocated to the new access point by a licenced electrician.

If you do not provide the required access walkway, lighting and service platform for appliances in roofs or under houses then it is just a matter of time before you will be caught out. Manufacturers have the right to suspend warranty where installations do not meet the standards and owners of non-compliant installations will report you to the OTR if they feel you have taken advantage of them.

Location of water heater, cylinders, regulator and electrical socket outlet.

[ Non-compliant access, photo taken from ceiling access point. ]


Plumbing Bulletin

Plumbing Roadshows 2020

2020 Roadshow dates

19 February Mount Gambier10 March Port Lincoln11 March Port Augusta25 March Victor Harbor1 April Tea Tree Gully22 April Clare6 May Berri20 May Murray Bridge27 May Kadina17 June Tonsley24 June Fullarton1 July Port Adelaide15 July Streaky Bay

We encourage the following to attend:• Plumbing contractors, workers and apprentices

• Environmental Health Officers

• Council staff

• Plumbing lecturers

• Plumbing suppliers

• Plumbing and building consultants

• Architects

• SAMFS and CFS officers.

Registration To register, contact the Master Plumbers Association by visiting mpasa.com.au or calling (08) 8292 4000

Plumbing Expo to commence at 4.30pmPlumbing manufacturers and suppliers will have new and innovative products and samples on display.

Information sessions to commence from 6.00pm

Presentations from:• The Office of the Technical Regulator

(Plumbing)

• Council Environmental Health Officers

• Manufacturers

• The Master Plumbers Association

For further information on the Office of the Technical Regulator’s presentation, contact Brent Slee - 0477 725 535.

sa.gov.au/otr

Hosted by the Master Plumbers Association in conjunction with the Office of the Technical Regulator


sa.gov.au/otrplumbing

Office of the Technical Regulator

Tundish connections

In-wall tundishes are specially designed to mount in a wall cavity and receive discharges from condensate and backflow prevention devices.

Specific requirements exist for the installation of tundishes to be compliant with the performance requirements of the National Construction Code Volume 3, Plumbing Code of Australia (PCA).

Tundish product suitability Any part of a plumbing and drainage installation must be constructed using materials and products which are fit for their intended purpose to the requirements of the PCA.

To ensure materials and products are fit for purpose, they must be either WaterMarked or have evidence that they are suitable for the application.

Tundishes are not currently required to be WaterMarked but must be made of suitable materials and must be installed in accordance with AS/NZS 3500.2.

The PCA’s performance requirements for sanitary plumbing systems require access for maintenance purposes. Systems must also prevent the entry of water, sewage, sullage, foul air and gasses from the system into buildings.

In-Wall Tundishes (IWTs)

Connection of IWTs

IWTs must be accessible and may be connected to:

• a waste pipe which may be discharged to a floor waste gully. The maximum length of the unvented discharge pipe must not exceed 10 m.

• to a trapped waste pipe, no smaller than DN40, which may be connected in accordance with Appendix B of AS/NZS 3500.2.

• to a fixture trap if:

» the connection is made above the level of the water seal; and

» the top of the tundish is above the flood level rim of the fixture.

Plumbing Advisory NoteOctober 2019

The design of tundishes can vary greatly in design depending on where they are located. Generally tundishes receive discharges from backflow prevention devices, condensate, and relief drain lines.

Continued over page...

Legislative requirements

The National Construction Code Series Volume Three, Plumbing Code of Australia Part C1 (PCA) specifies the performance requirements related to the installation of sanitary plumbing systems.

AS/NZS 3500.2 Sanitary plumbing and drainage is the deemed to satisfy solution listed in the PCA related to the installation requirements for tundishes.

Example of an in-wall tundish


Contact the Office of the Technical Regulator for more informationOnline sa.gov.au/otrplumbing

Email [email protected]

Phone 1300 760 311

Design and installation of IWTs

IWTs must only be installed in rooms where the floor is waterproof. IWTs must be designed and installed to ensure:

• a minimum 25 mm air gap is achieved by the discharging pipe and the spill level (typically the bottom of the front cover opening which maintains the tundish air gap) — the air gap is not to be compromised at any stage.

• the wall surface surrounding the tundish and the inlet at the top of the tundish must be watertight to prevent vermin or debris entering the tundish or walls.

• the lip on the tundish overflow spill level must not allow water ingress into the surrounding structures and prevents damage to the building structure.

• that where IWTs discharge to a floor waste gully, the floor waste gully must also receive discharge from another fixture (for example, a hand basin).

Air gaps

Pipes discharging over a tundish must have an air gap of at least 25 mm, or twice the size of the internal diameter of the discharging pipe (whichever is greater).

>25 mm

>25 mm

Untrapped waste DN25maximum length 10 mFloor waste

gully riser

In wall tundish (IWT)


sa.gov.au/otrplumbing

Office of the Technical Regulator

To the owner/occupier,

It has been brought to the attention of the Office of the Technical Regulator (OTR) that a sewer surcharge has occurred at your property.

The OTR has also been advised that the Overflow Relief Gully (ORG) installed as part of your property’s sanitary drainage system does not comply with the requirements of the AS/NZS3500 Plumbing and drainage standard.

ORGs are installed outside a building and must be installed so that the top of the ORG grate is 150 mm lower than your lowest fixture connecting to that drainage system.

Often your lowest fixture will be a shower or floor waste gully in a bathroom. ORGs are required to be slightly higher than surrounding paved paths or concrete paths to prevent excess water or foreign matter from entering through the grate.

An ORG will act as an overflow relief point in the event of a sewer surcharge from the water industry entities’ sewerage infrastructure.

The diagram below shows the details of a compliant ORG.

For further information, please contact The Office of the Technical Regulator on 1300 760 311.

Protection against sewer surcharging within buildingPlumbing advice to property owner

Loose plasticoverflow reliefgully grate

25 m

m15

0 m

m m

in Lowest fixturein wet area(shower grate)

Property sewer

Ground level


The Technical Regulator is publishing the Standard for Dual Reticulation Infrastructure for the water industry in South Australia following thorough consultation with stakeholders.The purpose of the Standard is to prescribe the minimum requirements and responsibilities of all parties involved

in dual reticulation infrastructure to ensure the safety and reliability of the water services provided to South

Australian consumers. The Standard will provide clarity on mandatory requirements related to the installation

and connection of dual reticulation systems to dwellings and will enable the OTR to standardise

industry practice to prevent cross-connections.

The Standard will come into effect on the date on which it is gazetted and will be applicable

to all new and modified dual reticulation developments in South Australia. A 12-month

transition period will be in place to give time to water industry entities to fully comply with

the new standard.

The Standard for Dual Reticulation Infrastructure was developed in response to an increasing number of incidents and issues associated with dual reticulation supply in the State in recent years.

The Office of the Technical Regulator (OTR) identified inconsistencies in industry practice between the various parties (i.e. developer, builder, plumber, water utilities), thus increasing the risk of incidents occurring. In addition, dual reticulation developments are expected to increase, thus supporting the need for a solution to prevent further potential incidents.

The Standard for Dual Reticulation Infrastructure provides a clear practice for industry to follow, removing the risk of misidentification of services and simplifying the responsibilities of each party. The aim of the Standard for Dual Reticulation Infrastructure is to eliminate cross-connection incidents in dual reticulation supply.

Once published, the Standard will be available at the following webpage: Standard for dual reticulation infrastructure webpage

[ Publication of Standard for Dual Reticulation Infrastructure ]

https://www.sa.gov.au/topics/energy-and-environment/electrical-gas-and-plumbing-safety-and-technical-regulation/acts-regulations-and-standards/water-and-sewerage-acts,-regulations-and-standards


In the Gazette on the 6th February 2020, an Infrastructure Standard was published by the Technical Regulator, Rob Faunt. This Infrastructure Standard adopts the Water Services Association of Australia (WSAA) Codes as the principle minimum standard for water and sewerage infrastructure in SA to provide clarity to the water industry on minimum technical requirements. To view the Infrastructure Standard click here.

The Water Services Association of Australia (WSAA) has developed National Codes (WSAA Codes) for the urban water industry detailing performance requirements for design, installation, inspection, alteration, repair, maintenance, removal, disconnection or decommissioning of water and sewerage infrastructure. The WSAA Codes have been widely adopted by water utilities across Australia, as well as the water industry as a whole. The WSAA Codes allow for water industry entities to make appropriate modifications (where necessary) to accommodate their needs and preference as well as providing instruction on local construction practices and products.

By formalising the WSAA Codes as the Infrastructure Standard, the Office of the Technical Regulator (OTR) recognises that the WSAA Codes have gone through a peer-review process and are widely accepted for the requirements of water and sewerage infrastructure.

If utilities produce supplementary notices and supporting documents which are equivalent to or exceed any WSAA requirements, then these will be recognised as suitable as part of this standard.

The intent is not for legacy assets to be updated, but that going forward, WSAA codes, supplementary notices and supporting documents which are equivalent to or exceed WSAA requirements are to be used for any design, installation, inspection, alteration, repair, maintenance, removal, disconnection or decommissioning of water and sewerage infrastructure.

For further information please contact Naomi Struve, Manager Water and Sewerage Infrastructure by emailing [email protected] or calling 08 8429 3622.

Infrastructure Standard

Wayne Bennetts, Plumbing Operations Coordinator at the Office of the Technical Regulator has retired from a career in plumbing spanning 47yrs. Wayne was also a keen footballer

and water skier during his youth and played competitive squash

up to 2015.

Wayne’s journey in the plumbing industry began as an

apprentice in 1972 with Robert R. Farnham and he continued his

employment there until 1983. While at Farnham’s, Wayne was mainly

involved in commercial installations but gained a solid knowledge base in all aspects of plumbing.

By 1983 Wayne was looking for a new challenge and began the next stage of

his career as a self-employed plumber, where he navigated a diverse range of complex plumbing installations.

In 2005 Wayne successfully applied for a position with SA Water as a Plumbing Installations Inspector and throughout his tenure gained the respect of many stakeholders within the plumbing industry, largely due to his “what’s best for plumbing” attitude. The 2013 transition of plumbing regulation from SA Water to the OTR saw Wayne move to the position of Plumbing Operations Coordinator, which he held until his retirement in September 2019.

In retirement I have no doubt Wayne will be kept busy by his passion for classic V8 cars and restorations, along with

continuing the friendships he has forged through his career.

We wish Wayne and his family health and happiness in his retirement and acknowledge his contribution to the industry over many years.

Wayne Bennetts Retires

https://www.sa.gov.au/topics/energy-and-environment/electrical-gas-and-plumbing-safety-and-technical-regulation/acts-regulations-and-standards/water-and-sewerage-acts,-regulations-and-standards

mailto:%20naomi.struve%40sa.gov.au?subject=

mailto:%20naomi.struve%40sa.gov.au?subject=


Electrical Technical AdviceOffice of the Technical RegulatorLevel 8, 11 Waymouth Street, Adelaide(Reception on Level 4) Phone: (08) 8226 5518 (8:00am-4:30pm)Email: [email protected]

Gas Technical AdviceOffice of the Technical RegulatorLevel 8, 11 Waymouth Street, Adelaide(Reception on Level 4) Phone: (08) 8226 5722 (8:30am-4:30pm) Email: [email protected]

Plumbing Technical AdviceOffice of the Technical RegulatorLevel 8, 11 Waymouth Street, Adelaide (Reception on Level 4) Phone: 1300 760 311 (8:30am-4:30pm)Email: [email protected]/otrplumbing

General InformationLicence and Address ChangeConsumer & Business ServicesPhone: 131 882 Email: [email protected] Appointments and InformationSA Power Networks Builders & Contractors LinePhone: 1300 6500 14Fax: 1300 6500 16Australian StandardsStandards Australiawww.standards.com.au AGAPhone: (03) 9580 4500www.gas.asn.au

TrainingGasMaster Plumbers Association1 South Road, ThebartonPhone: (08) 8292 4000Fax: (08) 8292 4040

GastrainU1, 61-63 Tapleys Hill Road, Hendon 5014(PO Box 83, Royal Park 5014)Phone: (08) 8447 7783Phone: 1300 955 583Fax: (08) 8447 7753www.gastrain.com.au

Electrical and GasTAFE info (for all training enquiries) Phone: 1800 882 661

Peer VeetRescue and Resuscitation, First Aid& other Industry related courses:1042 Port Road, Albert ParkPhone: (08) 8348 1200www.peer.com.au

ElectricalATEC (Adelaide Training and Employment Centre)Electrical Rescue & Resuscitation CertificatePhone: (08) 8240 1233www.atec.asn.au

Power Lines/CablesClearance ZonesBetween vegetation and power lines or building/structures and power lines contact the Office of the Technical Regulator Phone: (08) 8226 5667

SA Power Networks (SAPN)Phone: 13 12 61For locations of Gas, Electricity or Telecommunications“Dial Before You Dig”This service is still available when doing emergency excavations at short notice. Phone: 1100www.dialbeforeyoudig.com.au

For after-hours locations or gas emergency (including LPG)Origin Energy LPG: 1800 808 526Kleenheat: 1800 093 336Elgas: 1800 819 783APA Group Gas leaks: 1800 427 532(1800 GAS LEAK)

For gas or electrical major incident reporting 24 hours / 7 days (South Australia only)Office of the Technical RegulatorPhone: 1800 558 811This number also appears in the 24-hour emergency numbers section at the front of the South Australian White Pages

Gas Trade contactAPA Group Gas Distribution Network OperatorPhone: 1300 001 001

[ Contact List ]

[ Additional websites for further information ]South Australian Parliament for Acts and Regulationswww.legislation.sa.gov.au

SafeWork SAwww.safework.sa.gov.au

Gas Energy Australia (formerly ALPGA)gasenergyaustralia.asn.au

Australian Competition and Consumer Commission (ACCC)www.accc.gov.au

Australian Gas Networks Ltd(formerly Envestra)www.australiangasnetworks.com.au

Elgaswww.elgas.com.au

Origin Energywww.originenergy.com.au

Kleenheatwww.kleenheat.com.au

Australian Standardshttps://infostore.saiglobal.com/store/

The Backflow Shop–new address:27 South Road, Hindmarshwww.backflowshop.com.au

Tomlinson Energy26 Phillips StreetThebarton SA 5031www.tomlinsonenergy.com.au

mailto:otrmail%40sa.gov.au?subject=

mailto:otr%40sa.gov.au?subject=

https://www.sa.gov.au/topics/energy-and-environment/electrical-gas-and-plumbing-safety-and-technical-regulation/plumbing-trades

mailto:occupational%40sa.gov.au?subject=

http://www.standards.com.au

https://www.gas.asn.au

http://www.gastrain.com.au

https://peer.com.au

https://www.atec.asn.au

https://www.1100.com.au

https://www.legislation.sa.gov.au/index.aspx

https://www.safework.sa.gov.au

http://gasenergyaustralia.asn.au

https://www.accc.gov.au

https://www.australiangasnetworks.com.au

http://www.elgas.com.au

http://www.originenergy.com.au

http://www.kleenheat.com.au

https://infostore.saiglobal.com/store/

https://backflowshop.com.au/

https://www.tomlinsonenergy.com.au/

regulation roundup - issue 45 - march 2020 · of regulation roundup. roadshow 20 neca sa/nt 2020...

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