Key takeaways
- All plumbing, gas fitting and electrical work in SA is governed by the Plumbers, Gas Fitters and Electricians Act 1995.
- A plumbing business needs a Contractor's licence; the workers need separate worker registration. Two authorisations, not one.
- Anyone can verify a licence free on the CBS public register - do it before you sign a quote.
- Unlicensed plumbing work is illegal, can void insurance, and leaves you liable for remediation if it fails.
The governing legislation
All plumbing, gas fitting and electrical work in South Australia is regulated under the Plumbers, Gas Fitters and Electricians Act 1995. It is administered by Consumer and Business Services (CBS), a unit of the Attorney-General's Department.
The Act exists because bad plumbing and gas work is dangerous and expensive to remediate. Licensing is how the state makes sure the person touching your mains water or your gas line is qualified to do it.
Licence categories
The Act creates two layers of authorisation, and a properly set-up plumbing business holds both.
First, the business needs a Contractor's licence. There are three classes: plumbing contractor, gas fitting contractor, and electrical contractor. Second, the individuals doing the trade work need worker registration: plumber registration (covering water plumbing, sanitary plumbing, drainage and backflow prevention), gas fitter registration (work downstream of the gas meter or LPG cylinder), or electrician registration.
- Plumbing Contractor's licence - authorises a business to carry on plumbing work.
- Gas Fitting Contractor's licence - authorises a business to carry on gas work.
- Plumber / gas fitter / electrician worker registration - authorises the individual doing the trade work.
What it takes to hold a Contractor's licence
To hold a plumbing Contractor's licence in SA, an applicant must meet the CBS business criteria for contractors, show experience and qualifications, hold at least $10,000 in net assets (a restricted subcontractor-only licence exists below that), pass a photo identity check, and provide a National Police Certificate no more than 12 months old.
Registered workers, including apprentices, must carry a photographic registration card. Working unregistered, or employing an unregistered worker, carries significant penalties under the Act.
How to verify a plumber yourself
CBS maintains a public licence register that anyone can search. Ask the plumber for their licence number and search it on the CBS public licence register, or use the 'Check an occupational licence' page on cbs.sa.gov.au.
Search the licence before you sign a quote. It is free, instant, and confirms the trade is current. Every Plumbers Adelaide network plumber's licence is checked against this same register before a job is assigned.
Codes, gas certificates and tempering valves
Plumbing work in SA must meet the Plumbing Code of Australia and the AS/NZS 3500 series. Three points matter most to homeowners.
Gas: every fixed gas appliance installation must be done by a registered gas fitter and certified with a Certificate of Compliance through the Office of the Technical Regulator. Hot water: new installations must include a tempering valve limiting the bathroom outlet to 50 degrees Celsius, under AS 3498. Backflow: testable backflow devices must be installed and annually tested by a plumber with SA Water backflow accreditation.
Why unlicensed work is a real risk
The Act imposes significant penalties on unlicensed contractors, on licensed contractors who use unregistered workers, and on anyone who fails to issue gas Certificates of Compliance or install required tempering valves and backflow devices.
For you as the customer, the exposure is practical: unlicensed work can void your home insurance, and if the work fails you may bear the cost of putting it right. Verifying a licence takes one minute and removes that risk entirely.