Plumbing Licence Northern Territory: PDLB and Licensing Rules

What it is

In the Northern Territory (NT), plumbing and drainage are regulated occupations. The Plumbers and Drainers Licensing Board (PDLB) is the statutory body that licenses and registers practitioners. The PDLB sits inside the NT Government regulatory system that includes the Water Supply and Sewerage Services Act 2000 (NT), which is the head Act covering water supply and sewerage services in the Territory.

The Utilities Commission of the NT administers licensing of water supply and sewerage service providers under the Water Supply and Sewerage Services Act 2000. The Plumbers and Drainers Licensing Board, by contrast, deals with the people doing the plumbing and drainage work at the tap, fixture or drain. The two systems operate side by side.

What the PDLB issues

The Plumbers and Drainers Licensing Board issues two main forms of authority in the NT.

Advanced tradesperson licence

An Advanced Tradesperson licence allows a qualified plumber or drainer to perform and sign off on plumbing or drainage work in the NT without supervision. This is the licence a residential builder normally looks for when engaging a plumbing contractor.

Registered journeyman

A Journeyman registration is for plumbers and drainers who have completed their trade qualification but are not yet at advanced tradesperson level. A Journeyman performs plumbing or drainage work under the supervision of an Advanced Tradesperson in the NT.

The PDLB also handles certifying plumbers and drainers, who can certify that work meets the standards required under the relevant NT plumbing code and Australian Standards.

Scope of regulated work

Plumbing and drainage work in the NT covers water supply, sanitary plumbing, drainage, stormwater and (under separate gas authorities) gas fitting. Plumbing work must be carried out in accordance with the Plumbing Code of Australia and AS/NZS 3500 series Standards, as applied in the Territory. Work outside the licence scope, or without a licence at all, is an offence and can be acted on by inspectors.

Inspections and quality

Inspectors examine and test plumbing and drainage work in the NT and can report to the Plumbers and Drainers Licensing Board on the quality of workmanship of plumbers and drainers. Where workmanship is poor or licence conditions are breached, the PDLB can take disciplinary action under its enabling Act.

For residential builders this matters because a substandard plumbing job in the NT can have consequences for the builder as well as the plumber. The defective work has to be put right, and depending on the contract that cost can flow back to the head contractor.

How NT differs from other states

A few practical differences worth keeping in mind.

• NT does not use the same Practitioner or Certifier or Contractor labels as Tasmania. The PDLB uses Advanced Tradesperson and Journeyman.
• The Water Supply and Sewerage Services Act 2000 in the NT regulates the providers of the services. Licensing of plumbers themselves runs through the PDLB.
• Gas fitting in the NT is licensed separately, not bundled into a plumbing licence.

Practical takeaway for residential builders

Before engaging a plumber on an NT residential project, a builder should:

1. Ask for the plumber's PDLB licence or registration number
2. Confirm they hold the Advanced Tradesperson licence (or a Journeyman working under one)
3. Check the scope of work matches the job (water, sanitary, drainage or stormwater)
4. Confirm gas work is being done by an appropriately authorised gasfitter, not just under a plumbing licence

The PDLB and NT Government publish guidance and contact points for verifying licences. If the trade cannot show a current PDLB record, the work should not be starting in the NT.