How Much Does It Cost to Replace a Hot Water System in Perth? (2026 Guide)

If your hot water system has stopped working, is leaking, or simply isn't keeping up with your household's needs, one of the first questions you'll probably ask is: How much does it cost to replace a hot water system in Perth?

The answer depends on several factors, including the type of system, size of the unit, installation requirements, and whether you're upgrading to a different hot water technology.

In this guide, we'll break down the typical costs involved and explain what can affect the final price.

Average Hot Water System Replacement Costs in Perth

As a general guide, homeowners can expect to pay anywhere from $1,500 to $6,000+ for a new hot water system supplied and installed.

Typical price ranges include:

• Electric Storage Hot Water Systems: $1,500 - $3,000

• Gas Storage Hot Water Systems: $2,000 - $4,000

• Continuous Flow Gas Systems: $1,800 - $3,500

• Heat Pump Hot Water Systems: $3,000 - $6,000+

• Solar Hot Water Systems: $4,000 - $10,000+

Every home is different, so obtaining a professional assessment is the best way to receive an accurate quote.

What Affects the Cost?

Type of Hot Water System

The biggest factor affecting replacement cost is the type of system you choose.

Electric storage units are generally the most affordable upfront, while heat pump and solar systems have higher installation costs but can provide long-term energy savings.

Size of the System

A larger household typically requires a larger hot water system.

For example:

• 1-2 people: 125L-160L

• 3-4 people: 250L-315L

• 5+ people: 315L and above

Choosing the correct size helps ensure reliable hot water while avoiding unnecessary energy costs.

Installation Requirements

Additional plumbing or electrical work may be required depending on your property's existing setup.

Factors that may affect pricing include:

• Relocating the unit

• Upgrading pipework

• New electrical circuits

• Gas line modifications

• Limited access to the installation area

Upgrading to a Heat Pump

Many Perth homeowners are now choosing heat pump hot water systems due to their energy efficiency and lower running costs.

While heat pumps generally have a higher upfront installation cost, they can significantly reduce electricity consumption compared to traditional electric storage systems.

Repair or Replace?

If your hot water system is more than 10 years old, leaking from the tank, or requiring frequent repairs, replacement is often the most cost-effective solution.

A new system can improve reliability, increase energy efficiency, and reduce the risk of unexpected breakdowns.

Need a Hot Water System Replacement in Perth?

At Intec Plumbing, we supply and install a wide range of hot water systems across Perth, including electric, gas, continuous flow and heat pump systems.

If you're unsure which system is right for your home, contact our team for professional advice and an obligation-free quote.