Gas hot water installation across Wellington.
Infinity systems, califonts, LPG and natural gas. Plumbing, pipework and compliance handled by one person.
Why This Matters
One call. Both trades.
Gas work in New Zealand has to be carried out by a certified gasfitter. Wellington has plenty of plumbers, but relatively few who are also qualified to work on gas — which is why a lot of jobs end up needing two trades on site.
ZBF handles both sides. Whether you need a new infinity unit, a califont replacement, or a full gas hot water installation, Zac does the job from start to finish — including the gasfitting, pipework and compliance. No waiting around for a separate gasfitter to connect what someone else installed.
Cost in NZ
What does gas hot water actually cost?
It depends. The honest answer is that cost is driven by the system type, the fuel source, the unit size, and whether it's a straightforward swap or a new installation with additional pipework.
Unit size
A one-bathroom flat needs far less than a four-bedroom home.
Fuel source
Mains gas or LPG — each setup has different implications for install and running cost.
Existing setup
A like-for-like swap is straightforward. Switching from electric to gas or running new gas lines adds to the job.
Rinnai Infinity
Continuous-flow unit
Infinity Systems
No tank. No waiting.
Infinity systems — also known as continuous flow or califonts — heat water on demand with no storage cylinder. You get hot water when you turn on the tap, and it keeps flowing. No tank to run out, no energy wasted keeping stored water hot.
Zac installs the full Rinnai Infinity range across both natural gas and LPG. Cost depends on the model and output — not sure what size you need? Zac will assess your home and recommend the right unit for your bathrooms and usage.
Get a fixed quoteWhat to Expect
The job, step by step.
Most replacements are done within half a day. New installations may take a full day depending on pipework.
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01
Site visit & quote
Zac visits your property, assesses the setup, and provides a fixed quote. No surprises.
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02
Removal & install
On installation day, Zac removes the old system and installs and connects the new unit.
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03
Test & commission
Gas leak testing, pressure check, and full commissioning before handover.
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04
Safety Certificate
Gas Safety Certificate issued with every job — a legal requirement confirming the work meets NZ standards.
Other Gasfitting Services
Beyond hot water.
Gas hot water is the bulk of the work, but not all of it. ZBF also covers:
Gas heater servicing & installation
Flued and unflued gas heaters, wall-mounted units, and freestanding heaters. Service existing units, replace a faulty one, or install new.
Gas leak detection & repair
If you can smell gas, call Zac. He'll locate the leak, make it safe, and carry out the repair. Treated as urgent callouts.
Gas hob & cooktop connections
New kitchen or upgrading your cooktop? Zac connects gas hobs and ensures the installation meets compliance.
Compliance certificates
All gas work requires sign-off from a certified gasfitter. Zac issues Gas Safety Certificates with every job, and can provide compliance inspections for existing installations.
Frequently Asked
What people usually ask.
Can't see your question? Flick Zac a message or give him a call on 027 360 0378.
How much does gas hot water installation cost in NZ?
Costs vary by system type, fuel source, unit size, and whether it's a like-for-like swap or a new installation with additional pipework. A like-for-like swap is straightforward; switching from electric to gas or running new gas lines adds to the job. Contact Zac for a fixed quote on your setup.
What's the difference between an infinity system and a traditional califont?
Infinity systems (also called continuous flow or califonts) heat water on demand with no storage cylinder — you get hot water when you turn on the tap and it keeps flowing. There's no tank to run out, and no energy wasted keeping stored water hot.
Do I need a Gas Safety Certificate?
Yes — all gas work in New Zealand requires sign-off from a certified gasfitter. ZBF issues a Gas Safety Certificate with every job, which confirms the work meets NZ standards. It's also a legal requirement.
How long does a gas hot water installation take?
Most like-for-like replacements are done within half a day. New installations involving additional pipework may take a full day depending on the scope.
Do you handle gas leak callouts?
Yes — gas leaks are treated as urgent callouts. If you can smell gas, call Zac on 027 360 0378. He'll locate the leak, make it safe, and carry out the repair.
From the tools
Recent gas jobs.
Why ZBF for Gas
What every job includes.
Dual-qualified.
Plumbing and gasfitting in one visit. One quote, one tradesperson, one job done properly.
Straight advice.
If a repair makes more sense than a replacement, Zac will say so. No upselling.
Fixed pricing.
You'll know what the job costs before any work starts. No open-ended quotes.
Fast response.
Same-day and next-day callouts across Wellington. Gas leaks handled as urgent.
Where Zac Works
Gas hot water across greater Wellington.
From Upper Hutt down through central Wellington, out to the eastern bays and across to Porirua. Same-day callouts where possible, urgent gas leaks treated as priority.
- Wellington CBD
- Lower Hutt
- Upper Hutt
- Porirua
- Petone
- Eastbourne
- Wainuiomata
- Karori
- Miramar
- Kilbirnie
- Johnsonville
- Tawa
Get in Touch
Need an infinity installed? Flick a message.
New infinity unit, califont replacement, gas heater, or advice on switching to gas — Zac handles both the plumbing and gasfitting, and gives you a fixed price before any work starts.