Disconnecting a portable LPG heater for storage is a task most NZ homeowners can handle themselves — but gas safety must come first. Portable LPG heaters use a low-pressure regulator connected directly to an LPG cylinder, and because this connection is not part of a fixed gas installation, disconnecting it is generally not restricted work under NZ law. That said, you should always treat LPG with respect and follow the steps below carefully.
Understand What You're Working With
Portable LPG heaters typically connect to a standard 9 kg or 4.5 kg LPG cylinder via a regulator and a short rubber hose. The regulator screws onto the cylinder valve — usually with a left-hand (reverse) thread, meaning you turn it clockwise to loosen it. This is a deliberate safety design to prevent accidental loosening.
Because this is a portable, non-fixed appliance, disconnecting it does not constitute restricted gasfitting work under the Plumbers, Gasfitters and Drainlayers Act 2006. However, any work on fixed gas installations — pipes, fittings built into your home — must be carried out by a licensed gasfitter.
Step-by-Step: Disconnecting Your Portable LPG Heater
1. Turn Off the Heater and Let It Cool
Switch the heater off at the appliance controls and allow it to cool completely — at least 15–20 minutes. Never work on a hot heater or near an open flame.
2. Close the Cylinder Valve
Turn the cylinder valve (the handwheel on top of the LPG cylinder) clockwise until it is fully closed. This stops gas flowing from the cylinder.
3. Run the Heater Briefly to Clear the Line
With the cylinder valve closed, turn the heater on for a few seconds until the flame goes out on its own. This burns off any residual gas in the hose and regulator, reducing the amount of gas present when you disconnect. Then turn the heater controls back to the off position.
4. Disconnect the Regulator from the Cylinder
Using your hand (or a spanner if needed), turn the regulator nut clockwise to unscrew it from the cylinder valve — remember, it's a left-hand thread. Do this slowly. If you hear or smell gas, stop immediately, move away, and ventilate the area.
5. Check the Hose and Regulator for Damage
Before storing, inspect the rubber hose for cracks, brittleness, kinking, or perishing, and check the regulator for corrosion or damage. If the hose is more than 5 years old or shows any deterioration, replace it before next use. Replacement hoses and regulators are available at Bunnings or Mitre 10.
6. Cap or Cover the Cylinder Valve
Replace the plastic dust cap on the cylinder valve to keep it clean and protected. If your cylinder didn't come with one, ask your LPG supplier for one.
Storing the LPG Cylinder Safely
Proper cylinder storage is just as important as the disconnection process. Follow these guidelines:
- Store cylinders upright in a well-ventilated outdoor area, away from heat sources, direct sunlight, and ignition sources.
- Never store LPG cylinders indoors, in a basement, garage (unless well-ventilated and away from vehicles), or enclosed space where gas could accumulate.
- Keep cylinders away from drains and low-lying areas — LPG is heavier than air and can pool in low spots.
- Store cylinders on a stable, flat surface so they cannot tip over.
- Keep the cylinder valve closed at all times during storage.
- Check with your LPG supplier about any specific storage requirements for your cylinder size.
WorkSafe NZ provides guidance on safe LPG handling and storage that is worth reviewing.
Storing the Heater and Hose
- Store the heater in a dry, clean location — a garage or shed is fine as long as it's not damp.
- Coil the hose loosely and avoid sharp bends or kinks that can damage the rubber over time.
- Keep the regulator and hose away from oils, solvents, and rodents, which can degrade rubber components.
- Store the heater upright as per the manufacturer's instructions.
Checking for Gas Leaks Before Next Use
When you reconnect the heater next season, always perform a leak test before lighting it. Apply a small amount of soapy water to the regulator connection and cylinder valve — bubbles indicate a leak. Do not use the heater if you detect a leak; contact a licensed gasfitter or your LPG supplier.
When to Call a Professional
While disconnecting a portable LPG heater is generally a DIY-friendly task, you should contact a licensed gasfitter if:
- You smell gas and cannot identify the source
- The cylinder valve is stuck, damaged, or leaking
- The regulator or hose is damaged and you're unsure what replacement parts to use
- You want to convert from a portable heater to a fixed gas installation (this is restricted work requiring a licensed gasfitter — see PGDB)
- You have any doubt about the safety of your equipment
You can find qualified, licensed gasfitters in your area on tradedirectory.co.nz.
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