Understanding trade qualifications helps you hire the right professional for the job. Here's how plumbing and gas fitting licences work in NSW.
The fundamental distinction is simple: a licensed plumber with gas endorsement can legally perform both plumbing and gas fitting work. A standalone gas fitter can only work on gas systems — they cannot touch water pipes, drainage, or general plumbing.
This matters because many jobs involve both trades. Installing a gas hot water system, for example, requires gas line connection (gas fitting) and water pipe connection (plumbing). Hiring a dual-qualified tradesperson means one person completes the entire job, saving you time and coordination.
To become a licensed plumber in NSW, a tradesperson must complete:
• 4-year apprenticeship under a licensed plumber • Certificate III in Plumbing (CPC32620) • Minimum hours of supervised practical work • NSW Fair Trading licence application and assessment
Once licensed, a plumber can perform all general plumbing work including water supply, sanitary drainage, stormwater, roofing (gutters, downpipes, flashings), and mechanical services. Many plumbers then obtain additional endorsements for gas fitting, backflow prevention, or fire services.
A standalone gas fitter in NSW must complete:
• Certificate III in Gas Fitting (UEG30620) • 12 months of supervised practical work under a licensed gas fitter • NSW Fair Trading licence application
Gas fitters can install, repair, and maintain gas lines and gas appliances. They cannot perform any plumbing work outside of gas systems. This means if your gas hot water system needs both a new gas connection and new water pipes, a standalone gas fitter cannot complete the full job alone.
For most residential gas work, a plumber with gas endorsement is the most practical choice because the majority of gas jobs also involve plumbing connections. Common examples:
• Gas hot water system installation (gas + water + drainage connections) • Kitchen renovation with gas cooktop (gas line + water for dishwasher/sink) • Bathroom renovation with gas heating (gas line + water supply + drainage) • New gas bayonet installation near existing plumbing
At O'Brien Plumbing, all our gas-qualified technicians hold both plumbing and gas fitting licences, ensuring every job is completed by a single qualified tradesperson.
Always verify your tradesperson's licence before work begins. In NSW, you can check licence status through:
• NSW Fair Trading online licence check (service.nsw.gov.au) • Ask to see their licence card on-site • Check the licence number matches the name on their quote
A legitimate tradesperson will never object to you verifying their credentials. If they do, consider it a warning sign and find someone else.
Only if they hold a specific gas fitting endorsement on their plumbing licence. Not all plumbers are gas-qualified. Always ask whether they hold both qualifications before booking gas-related work.
Call-out rates are typically similar. However, hiring a dual-qualified plumber/gas fitter is often more cost-effective because one tradesperson completes the entire job rather than requiring two separate visits from different trades.
Unlicensed gas work is illegal, dangerous, and will void your home insurance. If discovered during a property sale or insurance claim, you may be liable for rectification costs. Always insist on a gas compliance certificate for completed work.
Need a Dual-Qualified Plumber & Gas Fitter?
All our gas technicians hold both plumbing and gas fitting licences. One tradesperson, one visit, complete job.