Is a plumber automatically allowed to work on gas?

No. In most jurisdictions gasfitting is a separate licence class or endorsement, and gas appliance work is a further one. A plumber may hold all of them and many do, but it is a question to ask rather than an assumption to make.

How often should a gas heater be serviced?

Manufacturers and state safety regulators commonly recommend every two years, and annually for older units and in rental properties in some jurisdictions. Ask for a carbon monoxide spillage test as part of the service and for the reading in writing. A heater can run, heat the room and still be venting combustion products into it.

Licensing · NT · gasfitter

How to check a gasfitter licence in Northern Territory

The short answer

The Plumbers and Drainers Licensing Board is the authority for gasfitters in Northern Territory, and the licence to look for is a gasfitting class on a plumber or drainer licence. Ask for the number and the exact entity name it is held under, which is often a company rather than the person on site, then search the board's licence list yourself rather than accepting a photo of a card.

Checked against 2 published sources, listed in full at the end of this page. How we source this

Who issues it, and where to search

Regulator

the Plumbers and Drainers Licensing Board

What the licence is called here: gasfitting class on a plumber or drainer licence
Register to search: the board's licence listPlumbers and Drainers Licensing Board (NT) ↗

Gas work in the Northern Territory is licensed through the same board as plumbing and draining, by class, so confirming the class rather than the licence is the check that matters.

How to check it, in order

Ask for the licence number and the exact name it is held under. It is often a company rather than the person standing in front of you, and the register searches on the name it was issued to.
Search the board's licence list yourself. A photograph of a card proves that a licence once existed, not that it is current.
Check the class or category covers this work. A licence that is valid for one kind of work is not a licence for another, and that is the gap that most often matters.
Check the expiry date and any conditions or disciplinary history recorded against it.
Confirm the ABN on the quote matches the entity named on the licence, using ABN Lookup. A mismatch between who is licensed and who you are contracting with is worth asking about before you pay a deposit.

What the licence covers

Gas pipework, appliance installation and appliance servicing. In most jurisdictions gasfitting is a separate class or endorsement from plumbing, and servicing gas appliances is a further endorsement on top of that.

What you can legally do yourself

None. There is no householder-permitted gas work of any kind in any Australian jurisdiction. Relighting a pilot following the label on the appliance is the only thing on the list, and it is not gasfitting.

This is the trade where the licence question has the most direct answer: gas leaks and faulty flues kill people, and every jurisdiction licenses the work accordingly. It is also the trade where the endorsement structure catches people out, because 'I am a licensed plumber' does not answer the question of whether someone may work on your gas.

Ask specifically about the appliance endorsement if the job is a heater or a hot water unit rather than pipework. Servicing a gas appliance, including the carbon monoxide spillage test that a proper heater service includes, is generally a separate authorisation from installing gas pipe.

Sources

Every source below was fetched and its response recorded on the date shown. Where a government site blocks automated clients, that is noted rather than reported as a successful check.

Plumbers and Drainers Licensing Board · Plumbers and Drainers Licensing Board (NT)Checked 2026-08-10 · live, but blocks automated clients so the specific page could not be confirmed
ABN Lookup · Australian Business RegisterChecked 2026-08-10 · responded 200 OK

Other trades in Northern Territory:

Checking a gasfitter somewhere else: