No — replacing a gas tap on your freestanding cooker is not a DIY job in New Zealand. This type of work is classified as restricted gasfitting work under the Gas Act 1992, meaning it must be carried out by a licensed gasfitter. Attempting it yourself is illegal, potentially dangerous, and could void your home insurance.
Why Gas Tap Replacement Is Restricted Work
In New Zealand, the Plumbers, Gasfitters and Drainlayers Board (PGDB) oversees the licensing of gasfitters. Under the Gas Act 1992 and its regulations, any work that involves connecting, disconnecting, altering, or repairing gas fittings — including burner taps, valves, and regulators on an appliance — is restricted to licensed practitioners.
A gas tap (also called a burner cock or gas valve) is an integral part of the gas fitting on your cooker. Replacing it involves:
- Disconnecting the appliance from the gas supply
- Disassembling internal gas components
- Reassembling and pressure-testing the gas circuit
- Verifying the repair meets the relevant NZ standards
All of these steps fall squarely within restricted work. Even if you're handy and confident, performing this work without a licence carries serious legal and safety consequences.
What the Law Says
Under the Plumbers, Gasfitters, and Drainlayers Act 2006, carrying out restricted gasfitting work without a licence can result in significant fines. More importantly, a faulty gas tap can cause gas leaks, fires, or carbon monoxide poisoning — risks that affect not just you but your whole household.
WorkSafe NZ treats gas safety incidents seriously, and insurers may decline claims if unlicensed work is found to have contributed to an incident. Always check your home and contents insurance policy conditions around gas appliances.
What a Licensed Gasfitter Will Do
When you hire a licensed gasfitter to replace your cooker tap, they will typically:
- Isolate the gas supply safely before starting work
- Remove the faulty tap and source a compatible replacement part
- Install and seal the new tap to the manufacturer's specification
- Pressure-test the connection to confirm there are no leaks
- Certify the work — in NZ, gasfitters must issue a Certificate of Compliance (CoC) for restricted gasfitting work
Always ask for your CoC when the job is done. Keep it with your home records — you may need it if you sell the property or make an insurance claim.
What You CAN Do as a Homeowner
While you cannot do the repair itself, there are a few things you can safely do:
- Turn off the gas at the isolation valve or meter if you suspect a leak
- Ventilate the area by opening windows and doors
- Avoid using naked flames or switches if you smell gas
- Contact your gas retailer or a licensed gasfitter promptly
- Check whether your cooker is still under manufacturer's warranty, as the repair may be covered
If you smell gas and cannot isolate the supply, leave the building and call 0800 764 764 (the national gas emergency line) or your local gas network operator immediately.
How to Find a Licensed Gasfitter
You can verify that a tradesperson holds a current gasfitting licence by searching the PGDB register. Always confirm their licence before work begins.
For a straightforward cooker tap replacement, a licensed gasfitter can usually complete the job in under an hour. As a broad guide only, expect to pay a call-out fee plus labour — costs vary by region and tradesperson, so get two or three quotes.
You can find qualified, local gasfitters in your area right here on tradedirectory.co.nz.
Does This Work Need a Building Consent?
Simply replacing a like-for-like gas tap on an existing freestanding cooker does not typically require a building consent — it is maintenance/repair work on an existing appliance. However, if you are relocating the cooker, changing the gas type (e.g. LPG to natural gas), or altering pipework, consent requirements may apply. Always confirm with your local council if you're unsure, as consent requirements can vary. The MBIE Building Performance website is a good starting point for understanding the NZ Building Code and Schedule 1 exemptions.
When to Call a Professional
Call a licensed gasfitter any time you need to:
- Replace or repair a burner tap, valve, or regulator on a gas appliance
- Reconnect a cooker to the gas supply after moving it
- Service or repair any internal gas components
- Investigate a suspected gas leak in an appliance
Never attempt to diagnose or repair internal gas components yourself, even temporarily. Gas leaks can accumulate quickly in an enclosed kitchen and ignite without warning.
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