Hot Water System Replacement Cost Melbourne (2025 Guide)
Wondering how much it costs to replace a hot water system in Melbourne? The short answer: $1,200–$3,500 for most residential systems, fully installed. This guide breaks down costs by system type so you can budget accurately.
Hot Water System Replacement Costs — Melbourne 2025
| System Type | Supply & Install Cost | Notes |
|---|---|---|
| Electric storage (125–250L) | $1,100 – $1,800 | Cheapest to buy, higher running costs. Common in apartments. |
| Gas storage (135–360L) | $1,300 – $2,200 | Lower running costs than electric. Good for larger households. |
| Gas continuous flow (instantaneous) | $1,500 – $2,800 | No tank — heats on demand. Very efficient. Popular in Melbourne. |
| Heat pump | $2,500 – $4,500 | Lowest running costs. Government rebates available. Needs outdoor space. |
| Solar hot water | $3,000 – $7,000+ | Excellent long-term savings but higher upfront cost. Rebates available. |
Prices are indicative for Melbourne metro as of 2025, including labour and GST. Exact cost depends on brand, capacity, and installation complexity.
What Affects the Final Cost?
Changing System Type
Replacing like-for-like (e.g., electric storage for electric storage) is the cheapest option. Switching from electric to gas requires running a new gas line — add $500–$1,500. Switching to solar or heat pump often requires electrical work in addition to plumbing.
Location and Access
A unit on the 5th floor takes longer than a ground-floor house. Confined spaces and difficult access add to labour costs.
Brand and Quality
We recommend Rheem, Rinnai, Bosch, and Dux for reliability and parts availability. Generic brands cost less upfront but can be harder to service. Most quality systems come with a 5–10 year tank warranty.
Disposal of Old System
Old system removal and disposal is typically included in our quoted price. Confirm this when requesting a quote.
Government Rebates on Hot Water Systems
Victorian homeowners may be eligible for rebates when upgrading to an energy-efficient system:
- Heat pump hot water systems — the Victorian Energy Upgrades (VEU) program offers rebates, often $200–$1,000 off the installed price
- Solar hot water — both federal STCs (small-scale technology certificates) and state rebates may apply
We can advise on what rebates are available for your situation when we quote.
Signs You Need a New Hot Water System (Not Just a Repair)
- The system is over 10 years old and having regular issues
- The tank is leaking (from the base — this usually means tank failure)
- Rust or brown water consistently coming from hot taps
- Repair costs would exceed 50% of replacement cost
If you’re unsure whether to repair or replace, we’ll give you an honest recommendation — not the most profitable one.
Get a Hot Water System Quote in Melbourne
Call 0468 013 012 or email admin@sedconplumbing.com.au. We’ll assess your current system, recommend the right replacement, and provide a fixed price before starting work.
VBA Licence 120392 · Melbourne metro · Same-day hot water repairs available
Related: Hot Water Repairs Melbourne · Plumber Cost Guide Melbourne
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