Licensed gas fitters for installations, repairs, leak detection and compliance certificates across the Central Coast. Same-day service for gas leaks. All work certified to AS/NZS 5601.
Gas fitting covers the installation, repair, maintenance and testing of gas supply systems in residential and commercial properties. On the Central Coast, this includes natural gas (mains) and LPG (bottled) systems — both require a licensed gas fitter for any work on the supply line, meter, regulator, appliances or flue.
Our licensed gas fitters handle gas cooktop and oven installations, gas hot water system connections, gas bayonet point installations for heaters, gas line extensions and new pipe runs, regulator replacements, gas meter relocations, and gas compliance testing for property sales and renovations.
A gas leak is a safety emergency. Natural gas and LPG are both flammable and can cause explosions, fires, carbon monoxide poisoning and asphyxiation. If you smell gas (the distinctive rotten-egg odour added to natural gas), hear a hissing sound near a gas line, or notice dead vegetation near a buried gas pipe — evacuate the building and call from outside.
We use electronic gas detectors and pressure-drop testing to locate leaks precisely — including leaks too small to smell. Pressure-drop testing involves isolating the gas system, pressurising it to a set level, and monitoring for any pressure loss over time. This method detects even micro-leaks in concealed pipework that would otherwise go unnoticed until they become dangerous.
Once located, the leak is repaired immediately — whether it is a failed fitting, corroded pipe section, damaged flexible connector, or faulty appliance valve. The system is then re-tested and certified before gas is restored.
A gas compliance certificate (also called a gas safety certificate or certificate of compliance) confirms that a gas installation meets the requirements of AS/NZS 5601 — the Australian Standard for gas installations. You need one when:
We issue compliance certificates on completion of all gas work. For existing installations, we can inspect and certify the system — or identify and rectify any non-compliant elements before issuing the certificate.
Installing a gas appliance is not a DIY job — it requires a licensed gas fitter to connect the appliance to the gas supply, verify correct gas pressure, check flue and ventilation requirements, and test for leaks. Incorrect installation can cause carbon monoxide poisoning, gas leaks, appliance damage and voided warranties.
We install all types of gas appliances including gas cooktops and ovens, gas hot water systems (storage and continuous flow), gas space heaters and ducted heating, gas fireplaces, outdoor gas BBQ points, and commercial gas equipment (fryers, ovens, boilers). Each installation is pressure-tested, leak-tested, and certified to AS/NZS 5601 before handover.
Older Central Coast homes often have undersized or corroded gas lines that cannot support additional appliances. If you are adding a gas cooktop to a kitchen that previously had electric, or installing a gas hot water system to replace electric storage, the existing gas line may need upgrading.
We assess the existing pipe diameter, calculate the gas demand of all connected appliances (measured in MJ/hr), and determine whether the supply line can handle the additional load. If not, we extend or upgrade the line — using copper, PE (polyethylene) or stainless steel depending on the application — and re-certify the entire system.
Typical cost ranges for gas fitting services on the Central Coast (GST-inclusive estimates):
| Service | Cost Range | What's Included |
|---|---|---|
| Gas leak detection & repair | $180 – $420+ | Electronic detection, isolation, fitting repair, AS/NZS 5601 certification |
| Gas cooktop installation | $180 – $350+ | Connection to existing bayonet/gas point, pressure test, leak test, certification |
| Gas bayonet point installation | $250 – $450+ | New gas point, pipe run from existing line, pressure test, certification |
| Gas hot water connection | $250 – $500+ | Gas line connection, flue installation (if required), commissioning, certification |
| Gas line extension (per metre) | $80 – $150+/m | New copper or PE pipe, fittings, pressure test, certification |
| Gas compliance certificate (inspection only) | $180 – $320+ | Full system inspection, pressure test, certificate issued |
Source: O'Brien Plumbing cost guide (obrien.com.au). On-site diagnostic included. Fixed prices confirmed before any work starts. 7-year workmanship warranty on all labour.
Central Coast properties use either natural gas (piped mains supply from Jemena) or LPG (bottled gas, typically 45kg cylinders). The key differences affect installation, running costs and appliance selection:
| Factor | Natural Gas (Mains) | LPG (Bottled) |
|---|---|---|
| Supply | Continuous piped supply — never runs out | Finite cylinder supply — requires refills or exchange |
| Energy content | 38.7 MJ/m³ | 95.6 MJ/m³ (propane) — higher energy per unit |
| Running cost | Lower per MJ (typically $0.03–$0.04/MJ) | Higher per MJ (typically $0.06–$0.10/MJ) |
| Availability | Only where mains gas network exists | Available anywhere — common in rural Central Coast |
| Appliance compatibility | Must be jetted for natural gas | Must be jetted for LPG — different orifice sizes |
| Pressure | 2.75 kPa (low pressure) | 2.75 kPa after regulator (high pressure at cylinder) |
Appliances are not interchangeable between gas types without re-jetting — a process that changes the gas orifice size to match the fuel type. We handle conversions in both directions.
O'Brien's gas fitting process for Central Coast homes and businesses is designed to be methodical, safe and fully compliant with Australian gas and plumbing standards. Our licensed gas fitters combine industry-standard testing equipment with decades of local experience to diagnose faults, make repairs, and certify new work. Below is a step‑by‑step overview of what to expect when you engage O'Brien for gas appliance installation, pipework repair or compliance testing.
Call our Wyong office on (02) 4351 3665 for immediate advice — we operate 24/7 for suspected gas leaks. On first contact we will:
For every attendance we charge a diagnostic/attendance fee of $180 inc GST. This covers arrival, preliminary safety isolation if required, on‑site diagnostic testing and a written summary of findings. On arrival our technician will:
After diagnostics we will explain the cause and present options. For non‑urgent repairs or installations we provide a written, itemised quote that includes materials, labour, compliance paperwork and warranty details. For emergency repairs we will advise on immediate remedial action and provide a follow‑up quote for permanent repairs.
All repair work follows prescribed safety and compliance procedures:
New appliance installations and re‑commissioned appliances receive full functional testing:
On completion of work we:
We retain records of all works and will proactively support warranty claims or follow‑up inspections if required. O'Brien is licenced, insured and works under 17 SWMS to ensure your site safety and compliance throughout the job.
Gas systems give early warning signs when something is wrong. Because gas faults carry safety and health risks — including explosion and carbon monoxide poisoning — early detection and action are essential. Watch for the following signs on Central Coast properties, especially in older homes or near the coast where corrosion and soil movement are common.
O'Brien provides transparent pricing and a clear diagnostic process. Our fixed diagnostic/attendance fee is:
What the diagnostic fee covers:
After diagnosis we provide a fixed-price written quote for repairs or installations. Our quotes are itemised and will show material costs, labour, statutory testing and compliance certification. For emergency repairs, we will explain any temporary remedial actions and provide a follow-up quote for permanent repairs.
Notes specific to Central Coast properties:
Pricing transparency: O'Brien does not proceed with any non‑emergency work without your written authorisation. We provide clear scopes, timelines and warranty terms in all quotes so you know the cost before we start.
Gas fitting for homes and businesses shares core safety and compliance principles, but there are important differences in scope, regulation and maintenance frequency. O'Brien services both residential and commercial sectors across the Central Coast from our Wyong base.
Both residential and commercial work must meet Australian standards; however, commercial installations often require additional reporting, commissioning records, and in some cases certification by specialist engineers. O'Brien issues gas compliance certificates on completion and can assist with any required documentation for council or insurer requirements.
Preventative maintenance reduces the chance of dangerous gas leaks and extends the life of your appliances — especially on the Central Coast where coastal salt, clay soils and high humidity increase the risk of corrosion and mechanical damage. The following region‑specific tips help protect your gas systems.
Precision testing and the right tools matter for safe, reliable gas fitting. O'Brien equips its licensed gas fitters with modern, calibrated tools to detect, diagnose and fix gas problems quickly and accurately on Central Coast properties.
Using calibrated, modern equipment reduces diagnostic time and minimises disruption. It also ensures we issue compliant gas compliance certificates backed by accurate, documented testing.
O'Brien is a dual plumbing and roofing company with a regional presence on the Central Coast — giving us unique advantages when delivering gas fitting services to Wyong, The Entrance and surrounding suburbs.
Below are common questions Central Coast customers ask about gas fitting, safety and costs. If your question isn't covered here, call our Wyong office on (02) 4351 3665.
If you smell gas, evacuate occupants to fresh air, avoid switching electrical devices on or off, extinguish any open flames if safe to do so, and call O'Brien's 24/7 emergency line immediately on (02) 4351 3665. If the smell is strong, also contact the gas network emergency number published on your meter plate. Our technicians will attend, isolate the supply if necessary, and perform pressure testing and leak location diagnostics.
The $180 inc GST diagnostic/attendance fee applies to all callouts and covers the technician’s arrival, preliminary safety checks, use of detection equipment (gas detectors, manometers), immediate isolation if necessary, and a written summary of findings with any recommended repair options. If you proceed with repairs or installation, we will provide a separate itemised quote. Gas compliance certificates are issued on completion of our work at no additional charge.
We provide 24/7 emergency response from our Wyong base. Response times depend on location and traffic conditions, but we prioritise confirmed or suspected gas leaks and significant CO incidents. Call (02) 4351 3665 for immediate assistance.
Yes. Our licensed gas fitters are experienced with both natural gas and LPG installations, repairs and metering. We carry the appropriate tools and materials for each fuel type and issue compliant documentation for all work.
Yes. O'Brien issues gas compliance certificates upon completion of installations and qualifying repairs. Certificates are provided as part of the final documentation package and can be supplied to local councils, certifiers or insurers as required.
Galvanised pipework and older copper lines are common in Central Coast homes from the 1960s–1990s. While some sections may remain serviceable, galvanised materials are prone to corrosion and obsolescence. We will assess the condition, perform pressure tests, and recommend targeted replacements with compliant materials sized correctly for your appliances.
Detectable leaks are commonly audible, smellable or found via gas detectors and often occur at joints, regulators or flexible connections. Slow seepage may be small leaks or system losses revealed by meter readings and pressure decay tests. Both are safety concerns and need investigation; we will perform leak isolation and pressure testing to locate and rectify either condition.
Yes. Our technicians are trained to work safely in a range of environments and follow specific SWMS when working in bushfire-prone locations. We will advise on protective measures for meters, flues and external equipment and ensure installations meet relevant local requirements.
Yes. We install, commission and service gas hot water systems (both continuous flow and storage where applicable). Due to high humidity and coastal conditions on the Central Coast, we recommend annual inspections for hot water flues, burners and sacrificial anode checks where applicable. We will ensure correct gas flow and safe venting.
Commercial installations typically involve larger capacity pipework, multiple appliances, metering upgrades and more extensive documentation. We coordinate with site managers, provide full commissioning records and can offer scheduled maintenance contracts to minimise business disruption. Our quotes will include any additional testing or certification required by the business or regulatory authorities.
O'Brien's Wyong base serves the Central Coast region with full gas fitting services, including emergency response. We service the following suburbs and surrounding areas:
If you are located elsewhere on the Central Coast, call (02) 4351 3665 — we often cover surrounding suburbs and can advise estimated arrival times and availability.
Gas safety is not a DIY task. O'Brien brings licensed gas fitters, modern diagnostic equipment and regional knowledge of Central Coast conditions to every job. For all gas fitting enquiries — repairs, installation, metering or compliance testing — call our Wyong office on (02) 4351 3665. We will prioritise safety, provide clear pricing (including our $180 inc GST diagnostic fee) and issue compliant documentation on completion.
Evacuate immediately. Do not operate light switches, phones or any electrical equipment inside the building. Turn off the gas meter if you can do so safely. Call us from outside on (02) 4351 3665 or call 1800 GAS LEAK (1800 427 532).
Yes. NSW law requires all gas fitting work — including connecting appliances to an existing gas point — to be performed by a licensed gas fitter. Unlicensed work is illegal, dangerous and voids warranties.
Gas leak detection and repair typically costs $180–$420+ depending on the complexity. This includes electronic detection, isolation, repair of the failed fitting or pipe section, and AS/NZS 5601 certification.
Yes. We re-jet appliances for the correct gas type, adjust regulators, and re-certify the installation. This is common when moving from a mains-gas area to a rural property or vice versa.
We cover Wyong, Tuggerah, The Entrance, Gosford, Terrigal, Erina, Woy Woy, Umina, Ettalong, Kariong, Ourimbah, Berkeley Vale, Toukley, Bateau Bay, Killarney Vale, Long Jetty and surrounding areas.
Need a Licensed Gas Fitter?
Same-day service for gas leaks. All work certified to AS/NZS 5601. Call (02) 4351 3665 or request a quote online.