How much does a hot water system replacement cost in Melbourne?

Hot water system replacement in Melbourne typically costs between $900 and $2,500 fully installed. Electric storage is at the lower end; heat pump systems attract government rebates.

How long does it take to replace a hot water system?

A standard replacement takes 2 to 4 hours. The home will have no hot water during the job but is typically restored the same day.

What type of hot water system is best for Melbourne?

Heat pump systems are most energy-efficient for Melbourne's climate and attract VEU rebates. Gas continuous flow suits larger households.

Are there rebates for hot water system replacement in Victoria?

Yes — the Victorian Energy Upgrades (VEU) program provides point-of-sale discounts on eligible heat pump and solar hot water systems.

How Much Does a Hot Water System Cost to Replace in Melbourne? (2026)

Christopher Unwin
May 2
2 min read

Updated: May 3

Hot Water System Replacement Costs — Melbourne 2026

These are honest ballpark ranges based on typical residential installations in Melbourne's south-east. Every job is different — the system type you choose, your existing pipework, access difficulty, and whether you're switching fuel types all affect the final price. ATC Plumbing always provides a firm quote before starting any work.

Gas Storage Hot Water Systems

Supply and installation of a quality gas storage hot water system typically ranges from $1,200 to $2,000 for a standard residential replacement at the same location with the same fuel type and no pipework changes. This covers a unit from a recognised brand such as Rheem, Rinnai, or Dux at the right capacity for your household.

Continuous Flow (Instantaneous) Gas Systems

Continuous flow systems range from approximately $1,500 to $2,500 installed. The unit cost is generally higher than storage systems, but there's no tank to corrode and no standby heat loss — so running costs are lower. Installation is often simpler when replacing a wall-mounted storage system in the same location.

Electric Storage Systems

Standard electric storage replacement typically costs $900 to $1,600 installed. Worth noting: in Victoria, off-peak electric storage systems are subject to restrictions under the gas substitution roadmap. Discuss your long-term energy direction before choosing an electric storage option.

Heat Pump Hot Water Systems

Heat pump systems cost more upfront — typically $2,500 to $4,000+ installed — but Victorian government rebates can offset $1,000 or more of this cost. Running costs are significantly lower than gas or standard electric systems, with most households seeing payback within 3–6 years through reduced energy bills.

What Affects the Final Price?

Key factors include the system type and capacity, whether you're changing fuel type (e.g. gas to electric, which requires new electrical work), pipework changes required, and access difficulty. ATC Plumbing provides same-day hot water replacements in most cases across Melbourne's south-east. Call 1300 282 758.