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Gas Hot Water Systems Melbourne

Gas hot water remains a practical option for many Melbourne homes — particularly those with existing natural gas connections and no immediate plans to electrify. Zap Tech Energy installs and replaces gas hot water systems across Greater Melbourne, including continuous flow (instantaneous) and storage tank units.

Zap Tech Energy also installs heat pump and electric hot water systems. If you are considering switching from gas to a more energy-efficient option, Zap Tech Energy will explain the costs, rebates and long-term savings of each path so you can make an informed choice.

Call 03 9404 0484 for a Hot Water Quote

Continuous Flow vs Gas Storage — Which Gas System Is Right?

We help you compare and install the right option between continuous flow and gas storage systems
Gas Continuous Flow (Instantaneous)

Heats water on demand as it flows through the unit. No tank required.

  • Unlimited hot water — no waiting for a tank to reheat
  • Compact wall-mounted design — saves floor space
  • Only uses gas when hot water is being drawn
  • Available in natural gas and LPG models
  • Higher upfront cost than storage, but lower ongoing waste
  • Common brands: Rinnai, Rheem, Bosch
Best for: Households that use hot water at unpredictable times or have limited space for a tank.
Gas Storage

Heats and stores a tank of water, kept at temperature by a gas burner.

  • Lower upfront cost than continuous flow
  • Simpler installation — especially for like-for-like replacements
  • Consistent water pressure and temperature
  • Tank sizes from 90L to 360L
  • Pilot light or electronic ignition models available
  • Standing heat losses (the tank continuously loses heat, especially in cooler locations)
Best for: Budget-conscious replacements where the existing infrastructure supports a storage unit.

Gas Hot Water System Cost in Melbourne

System Type Typical Installed Cost Best For
Gas storage 135L $1,500–$2,200 1–2 person households
Gas storage 170L $1,700–$2,500 2–3 person households
Gas storage 260–360L $2,000–$3,000 Larger families
Continuous flow (natural gas) $2,200–$3,500 Most households with gas
Continuous flow (LPG) $2,500–$3,800 Homes without natural gas
Prices include supply, installation, gas fitting and flue work. Additional costs may apply if gas piping needs modification or if a tempering valve upgrade is required.
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Other Services

Why Choose Zap Tech Energy for Gas Hot Water

  • Licensed electrician and gas installer — REC 34973, all electrical, gas fitting and flue work handled properly
  • Full-service capability — Zap Tech Energy installs gas, electric and heat pump systems, so recommendations are based on what suits your household
  • Clear, itemised quotes — pricing covers the unit, gas fitting, flue work, tempering valve and any plumbing modifications
  • Compliance guaranteed — all gas work meets Victorian regulations with a compliance certificate issued for every installation
Call 03 9404 0484 to Discuss Your Options

What Melbourne Homeowners Say

Should You Replace Gas With Gas — or Switch to Electric?

This is a genuine decision point for Melbourne homeowners, and Zap Tech Energy provides straightforward advice based on your specific situation.
Replace gas with gas when:
  • Your gas system has failed and you need a quick replacement
  • You have a functioning gas connection and no solar panels
  • The upfront cost needs to be kept to a minimum
  • You are not planning broader electrification of your home
Consider switching to a heat pump when:
  • You have solar panels (or plan to install them) — a heat pump can run on free solar energy
  • You want to reduce gas bills long term — heat pumps cost 60–80% less to run than gas
  • You qualify for Victorian rebates — STCs, VEU and Solar Victoria can reduce a heat pump to a similar price as a gas replacement
  • You are planning to disconnect gas entirely — hot water is often the last gas appliance in a home
Zap Tech Energy installs both gas and heat pump systems and can quote both options for a direct comparison.
Enquire About Both Options

LPG Gas Hot Water for Homes Without Natural Gas

Not all Melbourne properties have a natural gas connection — particularly in newer estates, rural-fringe areas or properties that have had gas disconnected. For these homes, LPG gas hot water is an option using bottled gas.

However, LPG is significantly more expensive to run than natural gas. If your home does not have a gas connection, Zap Tech Energy recommends considering a heat pump or electric hot water system as a more cost-effective long-term solution before committing to LPG.
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How Gas Hot Water Installation Works

# 1: Contact

Contact — Call 03 9404 0484 or enquire online with details of your current system.

# 2: Assessment

Zap Tech Energy reviews your gas supply, flue requirements, water pressure and household size to recommend the right unit.

# 3: Quote

Clear, itemised pricing covering the unit, gas fitting, flue work, tempering valve and any plumbing modifications.

# 4: Installation —

Licensed installer removes the old unit, installs the new system, connects gas and water, tests operation and checks flue compliance. Most replacements are completed within a few hours.

# 5: Compliance

All gas work meets Victorian regulations. A compliance certificate is provided for every gas hot water installation.

FAQ's

Gas Hot Water —
Frequently Asked Questions

Gas storage tanks typically last 8–12 years. Gas continuous flow units can last 15–20 years with regular servicing. Lifespan depends on water quality, usage and maintenance.
No. Gas hot water installation in Victoria must be completed by a licensed gasfitter. Electrical connections must be completed by a licensed electrician. Zap Tech Energy holds Electrical Contractor's Licence REC 34973 and arranges all necessary licensed trades.
A tempering valve mixes hot and cold water to deliver water at a safe temperature (50°C maximum) at fixtures accessible to children or vulnerable people. Victorian regulations require a tempering valve on all new and replacement hot water installations.
The Victorian Government has signalled a shift away from gas in new homes, and gas connection bans for new residential developments are being introduced. However, gas hot water systems can still be installed in existing homes with existing gas connections. Many households are proactively switching to heat pumps ahead of further policy changes.
Annual running costs for gas hot water in Melbourne typically range from $400–$800 depending on household size, system type (storage vs continuous flow) and gas tariff. This is higher than heat pump running costs ($150–$300 per year) but lower than standard electric storage on peak tariff.
If you have solar panels, plan to install solar, or want to reduce your gas bill, a heat pump is worth considering. After Victorian rebates, the installed cost of a heat pump can be comparable to a gas replacement — with significantly lower ongoing costs. Zap Tech Energy can quote both options for a direct comparison.
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Need a Gas Hot Water Replacement in Melbourne?

Call Zap Tech Energy on 03 9404 0484 or submit an online enquiry. Whether you are replacing gas with gas or considering a switch to heat pump, Zap Tech Energy provides clear advice and a transparent quote.
Call 03 9404 0484
Enquire Online