In New Zealand, disconnecting a gas appliance is almost always restricted work under the Gas Act 1992 and its regulations, meaning it must be carried out by — or under the supervision of — a licensed gasfitter. There are very limited exceptions for homeowners, and getting this wrong isn't just illegal; it can be genuinely life-threatening.
What the Law Actually Says
Gas work in NZ is governed by the Gas (Safety and Measurement) Regulations 2010 and overseen by the Plumbers, Gasfitters and Drainlayers Board (PGDB). Under these rules, restricted gas work includes connecting, disconnecting, altering, or repairing any gas installation or fitting that is part of a fixed gas supply system.
Put simply: if the appliance is connected to your home's gas pipework — whether that's natural gas or LPG — disconnecting it is restricted work.
What a Homeowner CAN Legally Do
There is one narrow exception most homeowners can use: unplugging or disconnecting a gas appliance at a bayonet fitting (also called a bayonet connector or quick-connect fitting). This is the twist-and-release connector you might see on a portable gas heater or a freestanding cooker.
If your appliance is connected via a bayonet fitting and you are simply:
- Removing the appliance from the bayonet (the fitting stays in place and self-seals), and
- Not touching any pipework, valves, or the fitting itself,
…then this is generally considered acceptable for a homeowner to do. The bayonet fitting is designed to be used by the public and seals automatically when disconnected.
However, if there is any doubt about the type of connection, or if you need to cap off a line, move pipework, or remove a hard-piped appliance (such as a gas hob, wall furnace, or hot water cylinder), you must call a licensed gasfitter.
What Is Definitely Restricted Work
Do NOT attempt any of the following yourself:
- Disconnecting a hard-piped appliance (screwed or soldered connections into pipework)
- Removing or capping off a gas pipe or valve
- Disconnecting a gas hot water cylinder, central heating boiler, or gas fireplace
- Any work on LPG cylinder regulators or manifolds beyond swapping a standard exchange cylinder
- Altering or extending any gas pipework
Attempting restricted gas work without a licence can result in fines, voided insurance, and serious safety hazards including gas leaks, fire, or carbon monoxide poisoning.
Why This Matters: Safety First
Natural gas and LPG are both highly flammable, and even a small leak can accumulate to dangerous levels in an enclosed space. Carbon monoxide — an odourless, colourless byproduct of incomplete combustion — is another serious risk if appliances are improperly handled.
If you ever smell gas:
- Do not operate any switches or appliances.
- Open windows and doors.
- Evacuate the building.
- Call your gas supplier or 111 from outside.
WorkSafe NZ provides guidance on gas safety hazards in the home.
Does Disconnection Require a Building Consent?
In most cases, simply disconnecting and removing a gas appliance does not require a building consent — it may fall under Schedule 1 exemptions of the Building Act 2004. However, if the work involves altering the gas installation in any significant way (such as capping or rerouting pipework), your licensed gasfitter may need to issue a Certificate of Compliance (CoC) for the work. Always confirm with your local council and your gasfitter what documentation is required. You can find more information at MBIE Building Performance.
Certificates of Compliance
When a licensed gasfitter completes restricted gas work, they are required to issue a Certificate of Compliance. This is your legal proof that the work was done correctly and to the required standard. Keep this document — you'll need it if you sell your home or make an insurance claim.
LPG vs Natural Gas: Any Difference?
The same rules apply to both LPG (bottled gas) and natural gas (reticulated/piped). While swapping a standard LPG exchange bottle at a bayonet is fine for a homeowner, any work beyond that — including changing regulators, connecting new appliances, or modifying hose assemblies — is restricted work.
When to Call a Professional
You should always hire a licensed gasfitter for:
- Disconnecting any hard-piped gas appliance
- Capping or modifying gas lines
- Removing a gas hot water system, hob, oven, heater, or fireplace
- Any work where you're unsure of the connection type
- Reconnecting an appliance after it has been moved
You can verify a gasfitter's licence on the PGDB website before hiring. To find a qualified local gasfitter near you, search the tradespeople listed on tradedirectory.co.nz.