How to Choose a Licensed Gas Fitter in Christchurch (What to Check For)

Gas work isn’t something to hand over to just anyone. Get it wrong and you’re not just looking at a bad install — you’re looking at a safety risk, a compliance headache, and possibly an insurance claim that doesn’t pay out. Whether you’re converting to gas hot water, adding a gas hob, or getting an existing appliance serviced, here’s exactly what to check before you let anyone near your gas line.

1. Check they’re actually licensed

In New Zealand, gas fitting is restricted work. Only a certifying gasfitter can sign off on gas installations, and anyone doing the physical work needs to be either certified themselves or supervised by someone who is.

Don’t take “yeah, we’re licensed” at face value. Ask for:

• Their gasfitting licence or certification number
• Confirmation they’re registered with the Plumbers, Gasfitters and Drainlayers Board
• A Gas Safety Certificate (GSC) or Certificate of Compliance (CoC) once the job’s done — this is your proof the work meets NZ standards, and you’ll need it if you ever sell the property or make an insurance claim

If a tradesperson can’t produce this, or gets vague when you ask, that’s your answer.

2. Ask what happens after the install

A good gas fitter doesn’t just connect the appliance and leave. Look for someone who will:

• Pressure test the line for leaks before signing off
• Explain how to safely operate and shut off the appliance
• Provide documentation you can keep on file
• Flag anything on your existing gas system that needs attention while they’re there

If a quote reads like “install and go,” ask what testing and paperwork is included — it should be standard, not an upsell.

3. Look for experience with your specific job

“Gas fitter” covers a wide range of work — hot water conversions, gas hobs and fires, LPG installations, commercial kitchen fit-outs, compliance certificates for rentals. Someone who’s great at servicing gas fires might not have done many full hot-water conversions, and vice versa.

When you call around, ask directly: “How many jobs like this have you done in the last year?” A fitter who’s confident in the answer is usually a safer bet than one who says “we do a bit of everything.”

4. Get a proper quote, not a guess

A trustworthy gas fitter will want to see the job — in person or via photos/video — before quoting. Be wary of a firm price given over the phone with no questions asked about your property, existing pipework, or appliance type. Gas jobs often uncover extra work once walls or ceilings are opened up, so ask upfront:

• What’s included in the quote (labour, parts, compliance certificate, callout fee)
• What isn’t included, and how extra work would be priced
• Whether the quote is fixed or an estimate

5. Check reviews — but read between the lines

Star ratings only tell you so much. When you’re reading reviews, look specifically for mentions of:

• Turning up on time (or communicating if they’re running late)
• Explaining the work in plain language
• Leaving the property clean and tidy
• Following up if an issue came up after the job

A handful of detailed, specific reviews tell you more than a hundred generic five-star ratings.

Red flags to walk away from

• Reluctance to provide licence details or a compliance certificate
• Cash-only jobs with no paperwork
• Pressure to skip testing or certification “to save time”
• A quote significantly lower than everyone else’s, with no clear reason why

The bottom line

Gas work is one area where it genuinely pays to slow down and check credentials before booking. A licensed, experienced gas fitter will expect these questions and answer them without hesitation.

If you’re in Christchurch or the wider Canterbury region and want a team that ticks every box above, Whitehead Plumbing & Gas’s gasfitting service covers installations, conversions, servicing, and compliance certificates for both residential and commercial properties.