Certifying Gas Fitters — Wellington, Hutt Valley, Kapiti & Porirua
Gas is convenient and efficient — but only when it’s installed, serviced and certified by someone who actually knows what they’re doing. Southern has been the gas fitters Wellington homeowners and builders call since 1982. Around 29,000 completed jobs, a Certifying Plumber & Gasfitter on staff, and Master Plumbers Association membership going back 25+ years.
Every job is backed by our own promise: Your Job On Time, or It’s Free. Call 0800 484 353 (0800 HUGE LEAK) — 24/7, including public holidays.
Residential Gas Fitting Wellington
New build, renovation, or swapping an old appliance — if it runs on gas, Southern Plumbing can install it, service it, and repair it across every Wellington suburb. We cover Karori, Johnsonville, Khandallah, Lower Hutt, Paraparaumu and everywhere in between.
- Gas fireplace installation (natural gas and LPG)
- Gas hobs and cook tops — Rinnai, Parmco, SMEG, Fisher & Paykel, Electrolux, Bosch
- Rinnai Infinity continuous-flow hot water
- 9kg LPG bottle installation and relocation
- Gas appliance repairs and annual servicing
Commercial Gas Fitters In Wellington
Restaurants, cafés, schools, rest homes, workshops — commercial gas installations have higher loads, tighter compliance demands, and less tolerance for downtime. Our commercial gasfitters handle everything from six-burner restaurant ranges and pizza ovens through to LPG vaporisers, Type 3 appliances and large ducted heating systems.
We follow a 14-step gas fitting process on every commercial job: plan check, pipe sizing, pressure test, commissioning, leak test, appliance certification and PS3 sign-off. You get the paperwork your insurer and council want, and an Energy Work Certificate lodged with the PGDB.
Gas Fireplaces, Flame-Effect Fires & Space Heating
Wellington southerlies don’t care how nice your lounge looks. A properly specced gas fire gets a room warm fast and keeps the rest of the house liveable. We install and service:
- Flued gas fires and flame-effect fires (Escea, Rinnai, Able)
- Freestanding and inbuilt gas fireplaces (natural gas and LPG)
- Ducted gas central heating with multi-room zoning
- Gas boiler hydronic (radiator) systems
- LPG cabinet heaters — sales, servicing and fault repairs
Every install comes with a Gas Safety Certificate and is commissioned to NZS 5261 / NZS 5601 parts 1 and 2.
Continuous-Flow & Storage Gas Hot Water
Endless showers, no storage tank in the cupboard, and a smaller energy bill than electric. Continuous-flow gas is the most popular hot water setup we install across Wellington — and a straight swap for a dying electric cylinder is simpler than most people expect.
- Rinnai Infinity — 20L, 26L and 32L models sized to your household
- Bosch Hydro Power (no battery, no power supply required)
- Storage gas cylinders for older-style installs
- Combi and dual-purpose heating + hot water systems
- See all gas water heating →
Correct pipe sizing is critical — a 26L unit needs 20mm supply for the first 9m then 25mm. We get it right first time.
We Self-Certify Our Own Gas Work
Most gasfitters have to wait for an external inspector. We don’t. Southern has a Certifying Plumber & Gasfitter on staff, which means we issue your Gas Safety Certificate, PS3, and Energy Work Certificate straight off the job — lodged with the PGDB, done.
All installations are commissioned to the Gas (Safety and Measurement) Regulations 2010, NZS 5262 gas appliance safety, and NZS 5601 parts 1 & 2.
Worried about an existing installation? Read how safe is gas?, how we detect gas leaks, or book a certification inspection.
Caravans, Boats & Marine Gasfitting
LPG on a boat or caravan has its own rulebook — stricter ventilation, sealed lockers, overboard venting, and a specific marine Gas Safety Certificate issued on completion. We’re a Chaffers Marina approved contractor and service vessels at Seaview and Evans Bay marinas too.
Full cylinder install, cook top and heater fitouts, insurance-compliant certification for boats over 10m, plus caravan and motorhome gas certificates. See marine & caravan gas →
Frequently Asked Questions
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Yes. Southern has a Certifying Plumber & Gasfitter on staff, so we self-certify our own work and issue your Gas Safety Certificate, PS3 and Energy Work Certificate directly — lodged with the PGDB. No waiting for a third-party inspector.