How do I know if I need a repair or full replacement?

If the tank itself is leaking, rusted, or over 10 years old, replacement is usually the more sensible option. Repairs make more sense for younger units with a faulty part like a thermostat or element.

Can I switch from electric to gas hot water?

Yes, but it needs a licensed gas fitter as well as a plumber, since it involves running a gas line and may need work on your meter connection.

Do heat pump hot water systems work well in Perth?

Heat pumps generally perform well in Perth's climate and can cut running costs compared to old electric storage systems, though they do need adequate space and airflow around the unit.

Hot water system replacement

Replacing a hot water system is a different job from a repair call. It usually comes up when a tank is leaking, has stopped heating altogether, or is simply old enough that a repair isn't worth it. This page is for anyone comparing quotes to swap out an old unit rather than patch it up.

A replacement job involves disconnecting and removing the old unit, then installing a new one that suits the household's hot water demand and existing connections. That could mean sticking with the same fuel type and a like-for-like swap, or switching between gas, electric, solar or heat pump systems, which often involves extra work for gas fitting, electrical wiring or plumbing changes.

Perth households are increasingly moving from old electric storage tanks to heat pump systems for the running cost savings, while others are switching from gas storage to continuous flow gas units for space and efficiency reasons. A good installer will talk through tank size, recovery rate and fuel type based on household size, not just swap like for like by default.

What it costs

The price swings a lot depending on the system type. A straightforward electric storage tank swap is generally the cheapest option, while heat pump and solar systems cost more upfront but can lower running costs over time. Switching fuel types (say electric to gas) adds cost because of extra pipework or wiring, and continuous flow systems have their own installation requirements.

Top 3 by our score

Ranked from our published scoring of public Google reviews for hot water systems.

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

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FAQ

How do I know if I need a repair or full replacement?: If the tank itself is leaking, rusted, or over 10 years old, replacement is usually the more sensible option. Repairs make more sense for younger units with a faulty part like a thermostat or element.
Can I switch from electric to gas hot water?: Yes, but it needs a licensed gas fitter as well as a plumber, since it involves running a gas line and may need work on your meter connection.
Do heat pump hot water systems work well in Perth?: Heat pumps generally perform well in Perth's climate and can cut running costs compared to old electric storage systems, though they do need adequate space and airflow around the unit.

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