Do I need both a plumber and a gas fitter for this job?

Often the same licensed tradesperson covers both, since many Perth plumbers hold gas fitting licenses too. Just confirm the person doing the work is licensed for gas fitting specifically.

Can my existing gas line handle a continuous flow unit?

Not always. Continuous flow units draw more gas at once than storage tanks, so the installer needs to check your gas meter and pipe sizing can supply enough gas on demand.

Is a permit needed to install gas hot water?

Gas fitting work needs to be done by a licensed gas fitter and is subject to compliance certification, though a full council permit isn't usually required for a straightforward hot water unit swap.

Gas hot water system installation

Installing a gas hot water system is a job that sits across two trades' worth of work: it needs correct gas fitting to connect the unit to the supply safely, plus plumbing to tie in hot and cold water lines and any relief valve drainage. It's a distinct job from a routine hot water repair or a general gas fitting task like a stove or heater connection.

This applies whether you're installing a new storage tank system or a continuous flow (instantaneous) unit, and whether it's a first-time gas connection to a property or a swap from an existing gas hot water setup. The installer needs to check gas line sizing, venting or flue requirements, and compliance with the relevant gas standards before signing off the job.

Continuous flow units are common in newer Perth homes and renovations because of their compact size and the ability to run multiple bathrooms, but they need adequate gas supply capacity, so an installer will often check the whole property's gas run, not just the connection point at the unit.

What it costs

Pricing depends on whether it's a straight swap using existing gas and water connections, or a new installation needing a new gas line run, upgraded meter capacity, or flue work. Continuous flow units can cost more to install than storage tanks due to venting and gas supply requirements, but running costs are often lower.

Top 3 by our score

Ranked from our published scoring of public Google reviews for gas installation service.

1. World of Plumbing and Gas Pty Ltd
5.0★ · 232 reviews

95
2. Marchant Plumbing and Gas - Roleystone WA
5.0★ · 246 reviews

94
3. Southline Plumbing & Gas
5.0★ · 199 reviews

94

See the full ranking → · Browse all providers

FAQ

Do I need both a plumber and a gas fitter for this job?: Often the same licensed tradesperson covers both, since many Perth plumbers hold gas fitting licenses too. Just confirm the person doing the work is licensed for gas fitting specifically.
Can my existing gas line handle a continuous flow unit?: Not always. Continuous flow units draw more gas at once than storage tanks, so the installer needs to check your gas meter and pipe sizing can supply enough gas on demand.
Is a permit needed to install gas hot water?: Gas fitting work needs to be done by a licensed gas fitter and is subject to compliance certification, though a full council permit isn't usually required for a straightforward hot water unit swap.

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