Skip to main content
24 Hours 365 Days - Get Services Now. Pay with       or pay later with  

Gas Hot Water Systems

We install repair and supply gas hot water systems for all properties across Melbourne. This includes the CBD, Kew, Richmond, and all surrounding suburbs.

Call Now
Get Quote

Pinnacle Plumbing service repair, supply and install a wide range of gas hot water heaters from Australia’s leading brands. We help our customers:

Choose the best
hot water system

Install, servicing and repair
their gas hot water systems

Gas VS Electric hot water Systems

If you’re just looking at the bills each month, gas is definitely the cheaper option in terms of running cost. While the installation of a gas hot water system costs more than installing an electric system, based on the savings you’ll make you can typically get that extra money back in a year or two of use.

Also unlike electricity there are no time-of-day tariffs for using gas, meaning that it’ll cost you the same no matter when you want to take that shower or run the bath.

Contact Us

What is a gas hot water System?

A gas hot water system uses either reticulated/piped natural gas or Liquefied Petroleum Gas (LPG) to heat water.

As mentioned a previously gas water heater is usually more expensive to buy and install than an electric hot water system, but it is generally cheaper to use. Another factor to consider is that a gas hot water heater also produces less greenhouse gas emissions than an electric hot water heater.

Contact Us

Types of Gas hot water Systems

Solar Hot Water Systems

Solar hot water systems consist of solar collector panels and a storage tank. As solar water heating is often not sufficiently powerful to deliver all the thermal heat necessary for a hot water heater in a standard Australian family sized home, a gas connected booster is used to ensure the water is always at the right temperature. A well-chosen solar hot water system may cost more to begin with, but for most homes they’ll be significantly cheaper to run than a conventional electric or gas system.

Continuous Flow Hot Water Systems

The most commonly preferred type of gas water heater is the continuous flow hot water system (also known as ‘tankless’, ‘instantaneous’ and ‘on-demand’ hot water systems). These are small wall-mounted units that heat water as you use it, rather than heating it slowly and storing it as a hot water storage tank does.

Gas Storage Hot Water Systems

Storage gas hot water systems use a gas burner located underneath the storage tank to heat the water. They usually have a continuously burning pilot flame that ignites the main burner when it is needed. Heat is then transferred from the gas burner through the bottom of the cylinder. Some heat also flows from the hot flue pipe into the water. When hot water is drawn off at the top of the tank, cold water enters the tank at the bottom.

Choosing the right water meter

Heating method, system type, size, cost and energy efficiency are the five main criteria to consider when purchasing a gas hot water system. Each of these factors has an impact on energy use and utility cost. The better you understand each one, the easier it is to compare different models.

Heating Method

Most gas hot water systems use a storage tank, while others heat water “instantaneously” as water passes through the heater and out to the tap or shower. Between the two, continuous flow hot water systems provide hot water on demand in every sense. But the disadvantage is it will generally provide a lower water pressure, so it’s not always the best option for homes that will be using more than a few bathrooms at once.

Size

Getting the right sized hot water system for your home is critical. The perfect size will mean rarely running out of hot water, never wasting money heating water you don’t use, as well as potentially saving on the purchase price of your new system. Many factors need to be considered to ensure the water heater you choose is ideal for your home, family and lifestyle.

Cost

The first thing to consider is maintenance and the ongoing costs for each type of hot water system. For example, hot water heaters with storage tanks that are not heavily insulated waste energy because of standby heat loss, making it more expensive to run annually. Having a hot water heating and plumbing professional to guide you with the purchase of your new gas hot water heater can make all the difference. After all it’s a decision you’ll be living with for along time and it’s important you make the right one.

Energy Efficiency

Always check how energy efficient a hot water system is to maximise savings on cost and power consumption. Each model has different energy ratings based on recovery efficiency, standby losses, and cycling losses.

Hot Water Repair Services

No job is too big or small for our experienced team. With over 20 years’ experience Pinnacle Plumbing delivers the convenience of a local, competitively priced, plumber providing a complete range of quality hot water system and residential plumbing services across the Melbourne CBD and inner city. Here are just a few of the hot water repair services we provide:

  • Hot water system inspections, repairs & installations

  • Hot water heater broken thermostats

  • Broken heating elements

  • Hot water leaks from unit or pressure release valves

  • Broken pilot light or tempering valve

  • No hot water or inadequate hot water

  • And more

Gas Hot Water System Installation & Repair in Melbourne

When your gas hot water system fails or when you’re ready to replace an ageing unit the decisions you make in the next few hours matter. Which brand? Storage or continuous flow? Repair or replace? And what does it actually cost in Melbourne right now?

At Pinnacle Plumbing, we install, repair, and service gas hot water systems across Melbourne every day. We supply and install all major brands Rinnai, Rheem, Dux, and Bosch and our licensed gasfitters carry out every job to full VBA compliance. Whether you need an emergency same-day replacement or you’re planning a new installation, we give you straight answers and honest pricing before we do anything.

Call us 24/7 on (03) 9417 6494 or read on for everything you need to know about gas hot water systems in Melbourne.

Gas Hot Water Systems: Storage vs Continuous Flow

The first decision every Melbourne homeowner faces is whether to go with a storage tank system or a continuous flow (also called instantaneous or tankless) system. Both run on natural gas. Both work well. The right choice depends on your household.

Gas Storage Systems

A gas storage system heats and stores a fixed volume of water typically between 135 and 400 litres ready for use. The burner fires up to reheat the water as it cools or as you use it.

Storage systems suit households with predictable hot water routines, properties where space is not a constraint, and situations where the upfront cost is the primary consideration. They are generally simpler to install and repair, and parts are widely available across Melbourne.

The trade-off is standby heat loss the tank loses some heat continuously, even when nobody is using hot water. Over a year, this adds up on your energy bill.

Gas Continuous Flow Systems

Continuous flow systems heat water on demand the moment you turn on the tap, the gas burner fires and heats water as it flows through the unit. There is no tank, no standby heat loss, and theoretically no limit on how much hot water you can use at once.

These systems suit households with high or unpredictable hot water demand, inner-city properties with limited outdoor space, and homeowners focused on long-term running cost savings. Rinnai’s continuous flow B26 and Infinity 26 models are consistently rated among the best performers in this category, and Bosch compact units are particularly well suited to apartments and smaller Melbourne terrace homes where space is tight.

The trade-off is a higher unit cost upfront and more complex installation in some situations.

Our recommendation:

For Melbourne households of 3 or more people with space for a tank, gas storage is often the most cost-effective choice. For 1–2 person households, inner-city properties, or anywhere running cost savings matter most, continuous flow is typically the better long-term investment.

Brand Comparison: Rinnai vs Rheem vs Dux vs Bosch

We install all four of these brands regularly across Melbourne. Here is an honest comparison based on what we see in the field not marketing material.

Contact Us

Rinnai

Rinnai is the gold standard for continuous flow gas hot water in Australia. The Infinity range delivers precise temperature control, strong energy ratings, and Japanese-engineered reliability. If you are installing a continuous flow gas system and want the best performer on the market, Rinnai Infinity is our most recommended unit. Rinnai’s Japanese engineering delivers precise temperature control an essential feature in Australia’s fluctuating weather conditions.

Best for: Continuous flow gas. Households wanting maximum energy efficiency and precise temperature control. Warranty: Up to 12 years on heat exchanger (Infinity range).

Rheem

Rheem wins the most categories overall when it comes to breadth of range. With over 80 years of local Australian manufacturing, Rheem systems are widely available, thoroughly supported, and backed by the largest service network in the country. If something goes wrong with a Rheem system anywhere in Melbourne, parts are always available fast. Rheem is our top recommendation for gas storage systems.

Best for: Gas storage. Any household wanting the widest range of models and the strongest local support network. Warranty: 7–10 years on cylinder depending on model.

Dux

Dux is the practical value pick for storage replacements. Australian-manufactured in Moss Vale NSW, Dux offers solid reliability at a price point that is generally more accessible than Rheem or Rinnai. The Prodigy storage range in particular features fast recovery rates the tank reheats quickly after heavy use, which matters for larger households.

Best for: Budget-conscious gas storage replacement. Larger households needing fast recovery rates. Warranty: 7 years on cylinder.

Bosch

Bosch specialises in some of the best instant hot water technology available, offering compact and efficient gas continuous flow units perfect for inner-city homes or units with limited space. Bosch systems are German-engineered, carry strong energy efficiency ratings, and are particularly well-suited to Melbourne apartments and terraces where a full-size storage tank simply isn’t practical.

Best for: Compact continuous flow installations. Apartments, terraces, small properties with limited space. Warranty: 5 years parts and labour on most models.

Pinnacle Plumbing Group

Gas Hot Water System Comparison

Criteria
Rinnai
Rheem
Dux
Bosch
Best System Type Continuous Flow Gas Storage Gas Storage Continuous Flow
Australian Made No  ·  Japan ✓ Yes ✓ Yes No  ·  Germany
Price Range (Installed) $1,500 – $2,500 $1,200 – $2,200 $1,100 – $2,000 $1,400 – $2,200
Pinnacle recommendation
⭐ Continuous Flow
⭐ Gas Storage
⭐ Value Pick
⭐ Compact Spaces

Melbourne Gas Hot Water System Cost Guide

Emergency replacement of a standard 135–170L natural gas storage hot water system with a comparable new unit including disposal of the old unit, installation, and gas compliance certificate typically costs between $1,500 and $3,000 installed across Melbourne.

Here is what Melbourne homeowners typically pay:

Gas storage system (supply and install): $1,200 – $2,200
Continuous flow system (supply and install): $1,500 – $2,500
Gas hot water repair: $150 – $550 depending on fault and parts required
Gas compliance certificate: Included in all Pinnacle Plumbing installations
Same-day emergency installation: Available — call for current availability

Factors that affect your final cost

Factors that affect your final cost include the brand and model selected, the capacity required for your household size, the location of the existing system and whether the installation point changes, whether new gas line work is required, and the disposal of your existing unit.

📋

We provide fixed quotes before we start any work. No surprises on the invoice.

Victorian Energy Rebates: What Melbourne Homeowners Can Claim

If you are replacing a gas hot water system with an eligible energy-efficient alternative, you may be entitled to a Victorian government rebate.

Households that choose an eligible locally made hot water product including selected Rheem, Dux, and Rinnai models can receive a higher rebate of up to $1,400 through the Solar Victoria Hot Water Rebate program. A $1,000 rebate still applies to other eligible products.

After combining the Solar Victoria rebate with Victorian Energy Upgrades (VEU) program discounts, eligible customers can deduct up to $2,500 off the upfront cost of an eligible heat pump or energy-efficient hot water system.

Key rebate details:

  • Managed by Solar Victoria
  • Applicable to eligible heat pump and high-efficiency hot water systems
  • Rheem, Dux, and Rinnai products are among those eligible for the higher locally-made incentive
  • Rebate is applied as a point-of-sale discount — you pay less upfront, we handle the paperwork

Our team can confirm your eligibility and walk you through which systems qualify during your quote. Call (03) 9417 6494 to ask about current rebate availability.

📞  Call Now

VBA-Compliant Gas Hot Water Installation — What That Means for You

In Victoria, all gas hot water system installations must comply with regulations set by the Victorian Building Authority (VBA) and must be carried out by a licensed gasfitter.

At Pinnacle Plumbing, every installation includes a gas compliance certificate issued by our licensed gasfitters — a legal requirement in Victoria and your proof that the work was done correctly. This is critical for insurance purposes and for future property sales.

What our compliant installation process includes:

  • Full site assessment before installation
  • Correct sizing for your household’s hot water demand
  • Safe disconnection and disposal of your existing system
  • New system installation to AS/NZS 5601 gas installation standards
  • Pressure and temperature relief valve check and replacement where required
  • Gas leak test and system commissioning
  • Gas compliance certificate issued on completion
✅

We do not cut corners on compliance. Every job is done right the first time.

FAQ

What are the advantages of a gas hot water system over electric?
Gas hot water systems offer several advantages over electric systems: Faster Heating, Cost Efficiency, Continuous Supply, Environmentally Friendly, Reliability, Longevity. Considering these advantages, a gas hot water system can be a reliable, efficient, and cost-effective choice for your hot water needs.
How can I tell if my gas hot water system is malfunctioning?
If you suspect a malfunctioning gas hot water system, watch out for these signs: 1. Insufficient Hot Water: If you’re experiencing a decrease in hot water supply or the water is not getting as hot as it used to, it could indicate a problem with the system. 2. Strange Noises: Unusual noises like banging, popping, or hissing coming from the hot water system may indicate a malfunction. 3. Pilot Light Issues: If the pilot light keeps going out or has a weak flame, it could be a sign of a problem with the gas supply or the ignition system. 4. Leaks or Water Damage: Any signs of water leaks or water damage around the hot water system should be investigated promptly. 5. Gas Smell: If you detect the smell of gas near the hot water system, it’s crucial to turn off the gas supply immediately and seek professional assistance. If you notice any of these signs, it’s important to contact a professional plumber or gas technician to inspect and diagnose the issue. They have the expertise to safely identify and resolve any problems with your gas hot water system.
Can you repair or replace gas hot water systems?
Yes, at Pinnacle Plumbing Group, we specialise in repairing and replacing gas hot water systems. Our skilled technicians have the expertise to handle all aspects of gas hot water systems. Whether it’s diagnosing and fixing issues or installing a new gas hot water system, we provide reliable and efficient services.
What’s the importance of professional installation for gas hot water systems?
Professional installation for gas hot water systems is crucial for several reasons. Firstly, it ensures safety. Gas systems require proper handling and installation to prevent leaks, fire threats, or carbon monoxide poisoning. Secondly, professional installers are knowledgeable about local regulations and codes, ensuring compliance with safety standards. Lastly, professional installation guarantees optimal performance and efficiency, maximising the lifespan of the system. Don’t compromise on safety and efficiency; rely on experienced professionals for gas hot water system installation.
Do you work with both natural gas and propane hot water systems?
Yes, at Pinnacle Plumbing Group, we work with both natural gas and propane hot water systems. Our team of experienced plumbers is well-versed in handling and servicing a wide range of gas hot water systems, ensuring that we can meet the needs of our customers regardless of the type of gas source they have. Whether it’s natural gas or propane, we have the expertise to provide reliable installation, repair, and maintenance services.
What’s the typical lifespan of a gas hot water system?
The average lifespan of a gas hot water system is typically around 10-15 years. However, this can vary depending on factors such as the quality of the system, maintenance practices, and water quality. It’s important to educate customers about replacement timelines to ensure they are aware of when their system may need to be replaced to avoid unexpected breakdowns and maximise efficiency. Regular maintenance and monitoring can help determine the condition of the system and plan for a replacement when necessary. Consulting with a professional plumber can provide specific recommendations based on the individual system and its usage.
How often should I have my gas hot water system serviced?
To ensure the safety and efficiency of your gas hot water system, it is recommended to have it serviced annually. Regular maintenance helps identify and address any potential issues, ensuring optimal performance and extending the lifespan of the system. Professional servicing includes checks for gas leaks, burner cleanliness, thermostat calibration, and overall system functionality. Don’t compromise on safety and efficiency; schedule regular maintenance with a qualified professional.
What’s the cost range for gas hot water system installations or repairs?
The cost range for gas hot water system installations or repairs can vary depending on factors such as the type of system, its capacity, and the complexity of the installation or repair. Generally, installation costs can range from $1,000 to $3,000, while repairs may range from $200 to $800. It’s important to note that these are rough estimates, and it’s best to contact Pinnacle Plumbing Group at (03) 9417 6494 for a more accurate assessment and quote based on your specific requirements.
Do you offer emergency services for gas hot water system issues?
Yes, we offer emergency services for gas hot water system issues. Our team is available 24/7 to address any urgent problems and ensure your hot water system is back up and running quickly. Contact us at (03) 9417 6494 for immediate assistance.

Should You Repair or Replace Your Gas Hot Water System?

This is one of the most common questions we get from Melbourne homeowners. Here is our honest guide:

🔧
Repair is usually the right choice when:
  • The system is less than 8 years old
  • The fault is a single identifiable component (thermostat, igniter, pressure relief valve)
  • The repair cost is less than 40% of replacement cost
  • The system is a quality brand with parts readily available
🔄
Replacement is usually the right choice when:
  • The system is 10 years or older
  • You have had the same fault repaired more than once
  • The heat exchanger or cylinder is failing (these repairs rarely make financial sense)
  • You are switching fuel type or upgrading capacity
  • A Victorian rebate makes a new efficient system significantly more affordable
💬

When our plumber attends a repair job, we always give you an honest assessment of whether repair or replacement makes more sense for your specific situation — not the option that costs us more.

Book a Gas Hot Water System Quote Today

Whether you need an emergency replacement, a planned installation, or a repair assessment, Pinnacle Plumbing is available across Melbourne 24 hours a day.

We supply and install Rinnai, Rheem, Dux, and Bosch. We are fully licensed, VBA-compliant, and we give you a fixed price before we start.

Call (03) 9417 6494 or fill in our online quote form and we will get back to you promptly.

📞  Call Now

Testimonials

Hear what our customers have to say about their experiences with Pinnacle Plumbing Group. 

Contact Us Today

Enquiry Form