JR GAS & WATER INSTALLER ASSESSMENT
Our Gas Storage Hot Water Installer Verdict
This is the part of the product page we consider most important. It is our assessment of the product from the installer's side: construction, cylinder positioning, gas and water connections, commissioning and ongoing support, rather than a repeat of the specification sheet.
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JR GAS & WATER LOCAL INSTALLATION
Local Hot Water Installation Areas
View all hot water service areas🏷️ Brand – Rheem
🔢 Model Number – 347090
📦 Volume – 90L
📏 Width – 422mm
📐 Height – 1168mm
🌍 Manufactured In – Australia
🛠️ Cylinder / Heat Exchange Material – Steel Enamel
🛡️ Cylinder / Heat-Exchange Warranty – 10 Years
🔇 Noise Level – dBa
⚖️ Dry Weight – kg
⚡ Energy Source –
📡 WiFi Controller Built-in or Compatible –
⏲️ Built-In Timer –
💡 LED/LCD Status Indicator –
📊 Coefficient of Performance (COP) –
RHEEM GAS STORAGE HOT WATER
Rheem 4 Star 90L Gas Hot Water System Installation Brisbane & Gold Coast
JR Gas & Water supplies and installs the Rheem 4 Star 90L Gas Hot Water System for suitable homes across Brisbane, the Gold Coast and surrounding South East Queensland service areas.
The Rheem 347090 is a compact 90 litre natural gas storage water heater designed for external installation. It combines stored hot water with a 100 litre-per-hour recovery rate, giving the system a manufacturer-listed first-hour capacity of 190 litres.
For homes already using an external natural gas storage water heater, the Rheem 4 Star 90L can be a practical replacement where the existing gas supply, plumbing, location and household hot water demand suit the model.
Rheem 4 Star 90L at a glance: model 347090 is a 90L external natural gas storage water heater with a 4.0-star gas energy rating, mains-pressure delivery, 100L/hour recovery and 190L first-hour capacity. Rheem's current sizing guide lists the model for approximately 2–4 people in a moderate climate, although actual suitability depends on shower length, simultaneous use and household demand.
PRODUCT AT A GLANCE
Rheem 4 Star 90L Gas Storage Hot Water
90L Storage
Stores 90 litres of heated water ready for household use.
100L/Hour Recovery
Rheem specifies a recovery rate of 100 litres per hour at a 45°C temperature rise.
190L First Hour
Combining stored capacity and recovery gives a manufacturer-listed first-hour capacity of 190 litres.
4 Star Gas Rating
Part of Rheem's 4 Star gas storage range, with a 4.0-star gas energy rating for the 90L model.
WHO IT SUITS
Is the Rheem 4 Star 90L Right for Your Home?
The Rheem 4 Star 90L is best considered as a compact gas storage option for homes with moderate hot water demand and an existing or suitable natural gas connection.
Existing Gas Storage Homes
A strong candidate where an older external gas storage heater is being replaced and the existing services and location suit the new unit.
Smaller to Moderate Households
Rheem's current sizing guide lists the 90L model for approximately 2–4 people in a moderate climate. Household habits still matter, so sizing should not be based on occupant count alone.
Homes Wanting Stored Hot Water
Suitable for customers who prefer the familiar operation of a storage cylinder rather than changing to a continuous-flow system.
JR sizing note: Long showers, large baths, several people showering close together and simultaneous hot water use can increase demand significantly. The correct system should be selected around how the household actually uses hot water.
HOW IT WORKS
How Does the Rheem 90L Gas Storage System Work?
Unlike an instant gas water heater, the Rheem 4 Star 90L stores heated water inside an insulated cylinder. A gas burner reheats the stored water as its temperature falls or hot water is used.
Water Is Stored Hot
The cylinder keeps a volume of heated water available so hot water can be drawn immediately from the stored supply.
Gas Reheats the Tank
The natural gas burner heats replacement cold water entering the cylinder after hot water has been used.
Fast Recovery Adds Capacity
The 100L/hour recovery rate allows the system to continue reheating water after the initial stored volume begins to be used.
KEY FEATURES
Why Choose the Rheem 4 Star 90L?
4.0-star gas energy rating within Rheem's gas storage range.
Mains-pressure hot water designed to supply multiple outlets where the household and plumbing setup suit the system.
190L first-hour capacity combining 90L stored volume with the system's recovery performance.
External installation for suitable outdoor locations.
Natural gas operation for homes with a suitable natural gas supply.
Two anodes listed by Rheem as part of the 347090 design.
Common replacement connections designed by Rheem to assist replacement of many standard 3 and 4 Star gas storage models.
10-year cylinder warranty subject to Rheem's current warranty terms and conditions.
TECHNICAL DETAILS
Rheem 4 Star 90L Specifications
| Brand | Rheem |
|---|---|
| Model | 347090 |
| System Type | Gas storage hot water system |
| Installation Type | External |
| Gas Type | Natural Gas |
| Storage Capacity | 90 litres |
| Gas Energy Rating | 4.0 Stars |
| Recovery Rate | 100 litres/hour at 45°C temperature rise |
| First Hour Capacity | 190 litres |
| Gas Consumption | 25 MJ/hour |
| Height | 1168 mm |
| Width | 422 mm |
| Depth | 502 mm |
| Water Connections | Rp 3/4 |
| Gas Connection | Rp 1/2 |
| Relief Valve Pressure | 1400 kPa |
| Expansion Control Valve Setting | 1200 kPa where applicable |
| Manufacturer Sizing Guide | Approximately 2–4 people in a moderate climate and 1–3 people in a cool climate; actual household demand varies. |
| Cylinder Warranty | 10 years, subject to Rheem warranty conditions |
Technical data can change. Final installation should always use the current Rheem installation instructions and specifications supplied for the actual unit.
INSTALLATION REQUIREMENTS
What Does Installation Require?
The Rheem 4 Star 90L is an external natural gas storage water heater, so the installation needs to suit both the product and the property.
Suitable natural gas supply capable of supporting the water heater and the property's existing gas appliances.
Compliant external position with the required clearances and suitable access for installation and future servicing.
Suitable hot and cold water connections and an inlet-valve arrangement appropriate for the installation.
Correct gas connection and isolation for the water heater.
Pressure and relief arrangements appropriate for the system and local installation conditions.
Suitable drainage for relief-valve discharge and any other required installation drainage.
Like-for-like does not always mean zero additional work. An older installation may need valve, pipework, gas, drainage, base or compliance upgrades before the new water heater can be commissioned correctly.
JR INSTALLATION
What's Included With Your Rheem 4 Star 90L Installation?
JR's live product selector above shows the current installation packages and pricing for this water heater. The exact inclusions depend on the package selected and the condition of the existing installation.
System Supply
Supply of the applicable Rheem 4 Star 90L gas storage water heater as part of the selected installation package.
Professional Installation
Connection and installation by appropriately licensed trades for the plumbing and gas work required by the selected package.
Testing & Commissioning
The completed installation is checked and commissioned before the hot water system is returned to normal household use.
Additional works may be required where the existing installation is non-compliant, services need alteration, gas supply is unsuitable, valves require upgrading or the new system is being relocated. Use the live package information above for current inclusions.
INSTALLED PRICE
How Much Does a Rheem 4 Star 90L Cost to Install?
The current supplied-and-installed price is shown in the live installation selector above. JR uses installation packages so the price can reflect whether the job is a straightforward compliant replacement or requires a broader installation scope.
Existing System
A direct replacement of a suitable existing external gas storage system can be simpler than changing from another hot water technology.
Gas & Plumbing Condition
Gas pipework, isolation, water connections, valves, drainage and the condition of the existing installation can affect the work required.
Relocation or Upgrades
Moving the heater or upgrading services can increase the installation scope compared with an exact compliant replacement.
Check Current Installed Pricing
Use the live installation options above to compare the current JR packages, availability and price for your property.
SIZE COMPARISON
Rheem 4 Star 90L vs 135L vs 170L
If the 90L model may be too small for your household, Rheem also offers larger models in the 4 Star gas storage range.
| Specification | 90L | 135L | 170L |
|---|---|---|---|
| Model | 347090 | 347135 | 347170 |
| Gas Energy Rating | 4.0 Star | 4.0 Star | 4.1 Star |
| Storage Capacity | 90L | 135L | 170L |
| Recovery Rate | 100L/hr | 113L/hr | 120L/hr |
| First Hour Capacity | 190L | 248L | 283L |
| Moderate Climate Guide | 2–4 people | 3–5 people | 4–6 people |
Bigger is not automatically better. The best model depends on actual hot water usage, available installation space, gas supply and whether several hot water outlets are regularly used close together.
REPLACEMENT COMPATIBILITY
Can the Rheem 90L Replace My Existing Gas Storage System?
It can be a practical replacement for many existing external gas storage installations, particularly where the property already has natural gas and the new unit can use a suitable existing location.
Rheem specifically describes the 347090 as having common fittings that assist replacement of standard 3 Star and 4 Star gas storage heaters. That does not mean every old system is automatically a direct swap.
Existing heater dimensions should be compared with the new 1168mm × 422mm × 502mm unit.
Natural gas supply must suit the 25MJ/hour appliance input and total property demand.
Water and gas connections need to be accessible and suitable for the replacement.
Current installation requirements still apply even if the old heater was installed under older requirements.
BRISBANE INSTALLATION
Rheem 4 Star 90L Installation Brisbane
JR Gas & Water installs the Rheem 4 Star 90L gas hot water system across eligible Brisbane service areas for suitable natural gas properties.
Brisbane replacements often involve older external gas storage systems where the homeowner wants to stay with a familiar storage format rather than convert to continuous flow, electric storage or heat pump technology. In these situations, the 347090 can provide a compact replacement pathway where the gas supply, outdoor location and household demand suit the model.
JR can assess whether the job is a straightforward compliant replacement or whether the existing gas line, isolation, valves, drainage, pipework or location require additional work before installation.
GOLD COAST INSTALLATION
Rheem 4 Star 90L Installation Gold Coast
JR Gas & Water also supplies and installs the Rheem 4 Star 90L across eligible Gold Coast service areas.
For Gold Coast homes already connected to natural gas, the system can be a practical option where compact external gas storage still suits the household better than changing to a different hot water technology.
The installation should still be checked around household demand, available outdoor space, condition of the existing plumbing and gas supply, and whether the replacement requires any upgrades to meet the requirements of the new installation.
WARRANTY & OWNERSHIP
Rheem Warranty & Ongoing Maintenance
Rheem currently lists a 10-year cylinder warranty for the 4 Star gas storage range, subject to the manufacturer's warranty terms, application and conditions.
As with any storage water heater, ongoing ownership also includes maintaining the safety valves, anodes and associated plumbing in accordance with Rheem's service requirements. Regular maintenance can help identify valve deterioration, anode condition, leaks and other developing issues before they become larger problems.
Warranty periods can differ between the cylinder, labour and other components. Always refer to Rheem's warranty supplied with the product for the full current coverage and conditions.
COMMON QUESTIONS
Rheem 4 Star 90L Gas Hot Water FAQs
Is the Rheem 4 Star 90L a storage or instant gas system?
It is a gas storage water heater. It stores 90 litres of heated water in a cylinder and uses a gas burner to reheat the stored water as required.
What is the model number?
The current Rheem 4 Star 90L model is 347090.
Is the Rheem 90L natural gas or LPG?
Rheem's current manufacturer specification lists the 90L 347090 as a natural gas model. Larger models in the 4 Star range have different gas options, so gas type should always be confirmed for the exact model being installed.
How many people does a Rheem 90L gas system suit?
Rheem's current guide lists approximately 2–4 people in a moderate climate and 1–3 in a cool climate. This is only a sizing guide. Shower length, baths, simultaneous outlet use and household habits can change the amount of hot water required.
What is the recovery rate?
Rheem specifies a recovery rate of 100 litres per hour at a 45°C temperature rise.
What is the first-hour capacity?
Rheem lists the 90L model with a first-hour capacity of 190 litres, combining the stored hot water with the system's recovery during the first hour of use.
Can it supply more than one hot water tap?
Yes. Rheem describes the 4 Star gas storage range as mains pressure and suitable for supplying multiple taps. Actual performance still depends on household demand and the plumbing installation.
Can the Rheem 90L be installed indoors?
No. Rheem specifies the 347090 as an external installation model. Rheem has separate products designed for indoor gas storage installations.
Can it replace an older gas storage water heater?
Often, yes. Rheem positions the model as having common fittings to assist replacement of standard 3 Star and 4 Star gas storage heaters. The existing gas, plumbing, location and current installation requirements still need to be checked.
How much does Rheem 4 Star 90L installation cost?
Current JR supplied-and-installed pricing is shown in the live selector above. The applicable package depends on whether the existing installation is a straightforward compliant replacement or additional work is required.
What warranty does the Rheem 90L have?
Rheem currently lists a 10-year cylinder warranty for the 4 Star gas storage range, subject to its warranty terms and conditions. Coverage periods for labour and other parts may differ.
Should I choose the 90L, 135L or 170L model?
The 90L has the smallest storage and recovery capacity of the three. Larger households or homes with heavier hot water demand may benefit from the 135L or 170L model. Actual usage should guide the decision rather than household size alone.
Can JR install the Rheem 90L in Brisbane?
Yes. JR Gas & Water supplies and installs Rheem gas storage systems across eligible Brisbane and surrounding South East Queensland service areas.
Can JR install the Rheem 90L on the Gold Coast?
Yes. Supply and installation is available across eligible Gold Coast service areas where the property and gas supply suit the system.
Is same-day installation available?
JR's live product page currently offers same-day installation availability on suitable jobs where the live installation schedule allows. Check the selector above for current availability.
READY TO INSTALL
Install the Rheem 4 Star 90L With JR Gas & Water
The Rheem 4 Star 90L is a compact natural gas storage option for homes where a 90L external system, strong recovery and a familiar storage-style replacement suit the household and property.
Use the live installation selector above to compare current JR packages, installed pricing and availability. If you are unsure whether the 90L has enough capacity for your household or whether the existing gas storage installation is suitable for a direct replacement, use the quote option so the property and installation requirements can be checked before booking.
Gas storage hot water systems provide reliable, fast recovery hot water and are designed to deliver many years of dependable service. Like any gas appliance, they require regular maintenance to ensure safe operation, maximise efficiency and support your manufacturer's warranty.
Routine servicing helps identify worn components before they result in costly repairs or unexpected loss of hot water.
Homeowner Maintenance – Every 6 Months
Every six months we recommend carrying out a simple visual inspection of your hot water system.
Homeowners should:
- Carefully operate the Pressure & Temperature Relief (PTR) Valve.
- Operate the Expansion Control Valve (ECV) (where fitted).
- Check for water leaks around the system.
- Ensure the flue terminal is free from obstructions (where applicable).
- Keep the area around the appliance clear of leaves, debris and combustible materials.
- Inspect for signs of corrosion or rust.
- Listen for any unusual noises during operation.
Why is this important?
Regular operation of the PTR and ECV valves helps prevent mineral build-up that can cause the valves to seize or leak.
Keeping the flue clear allows combustion gases to vent safely and helps the burner operate efficiently.
Important: Always follow your manufacturer's instructions when operating safety valves, as hot water will discharge during testing. If you're unsure or unable to perform this maintenance safely, contact a licensed plumber.
JR 6-Month Gas Storage Health Check
Recommended Service – $99
A professional inspection helps ensure your gas hot water system is operating safely and efficiently while identifying potential issues before they become major repairs.
Our technician will:
- Inspect the complete hot water system.
- Check for leaks or corrosion.
- Test the PTR valve.
- Test the ECV (where fitted).
- Inspect burner operation.
- Check pilot flame or ignition system.
- Inspect the gas control valve.
- Check gas connections for leaks.
- Inspect the flue for safe operation (where applicable).
- Confirm correct burner performance.
- Check thermostat operation.
- Inspect surrounding pipework and fittings.
- Identify components showing signs of wear.
Service Price: $99
Routine inspections can improve reliability, maintain efficiency and reduce the likelihood of unexpected breakdowns.
Recommended 5-Year Major Service
Current Price: $449
Most gas storage hot water systems benefit from scheduled replacement of key components to maintain safe and reliable operation.
Our comprehensive 5-Year Service includes:
- Replacement of the sacrificial anode.
- Replacement of the Pressure & Temperature Relief (PTR) Valve.
- Replacement of the Expansion Control Valve (ECV).
- Full inspection of the gas storage system.
- Burner inspection and cleaning (where required).
- Gas leak testing.
- Flue inspection.
- Operational and safety testing.
- Inspection of pipework, valves and fittings.
Why These Components Matter
Sacrificial Anode
Most vitreous enamel-lined gas storage tanks contain a sacrificial anode.
The anode corrodes instead of the steel tank, protecting it from internal rust.
Once the anode is consumed, the tank itself begins to corrode, which can eventually result in leaks and complete tank failure.
Replacing the anode at the recommended interval is one of the most effective ways to extend the life of your hot water system.
Pressure & Temperature Relief (PTR) Valve
The PTR valve is an essential safety device that protects the storage tank from excessive pressure and temperature.
Mineral deposits and normal wear can prevent the valve from operating correctly over time, making routine testing and replacement important.
Expansion Control Valve (ECV)
Where fitted, the ECV controls pressure created as water expands during heating.
Maintaining the ECV helps reduce stress on the storage tank and associated plumbing, contributing to a longer system life.
Burner & Flue
The gas burner provides the heat required to maintain your hot water supply, while the flue safely removes combustion gases from the appliance.
A clean burner and unobstructed flue help ensure:
- Safe operation.
- Efficient gas consumption.
- Reliable ignition.
- Consistent hot water performance.
- Reduced risk of carbon monoxide hazards in flued systems.
If Your Hot Water System Isn't Working
Before arranging a service, check the following:
- Ensure the gas supply is turned on.
- Check whether other gas appliances are operating.
- Confirm the isolation valve is open.
- Check for any obvious water leaks.
- Ensure the pilot light is operating (where fitted).
- Check for any error indicators (electronic ignition models).
- Inspect the flue terminal for obstructions (where applicable).
- Listen for unusual noises during operation.
- Confirm the system has had sufficient time to recover after heavy hot water use.
If your system still isn't producing hot water, contact JR Gas & Water for professional diagnosis and repair.
General Signs Your System May Need Attention
Arrange a service if you notice:
- Insufficient or no hot water.
- Pilot light repeatedly going out.
- Burner failing to ignite.
- Rust-coloured or dirty water.
- Water leaking from the tank.
- Constant dripping from relief valves.
- Visible corrosion.
- Gas odours (leave the area immediately and contact your gas supplier or emergency services if you suspect a gas leak).
- Unusual burner noises.
- Reduced hot water recovery.
Early servicing can often prevent expensive repairs and extend the life of your hot water system.
Protect Your Warranty & Maximise System Life
Regular maintenance helps ensure your gas storage hot water system operates safely, efficiently and reliably.
Following the manufacturer's recommended maintenance schedule may also assist in maintaining warranty coverage.
Failure to maintain your system may result in:
- Premature tank corrosion.
- Worn or leaking safety valves.
- Reduced efficiency and higher gas consumption.
- Burner or ignition problems.
- Unexpected loss of hot water.
- Shortened system lifespan.
- Possible reduction or loss of manufacturer warranty, depending on the manufacturer's maintenance requirements.
Preventative maintenance is a cost-effective way to protect your investment, improve reliability and maximise the service life of your gas storage hot water system.
Please note: Maintenance requirements vary between manufacturers and models. Always refer to your owner's manual for the maintenance schedule applicable to your gas storage hot water system. JR Gas & Water services all major gas storage hot water brands in accordance with manufacturer recommendations where applicable.
ZipPay – 6-Month Interest-Free on All Products
ZipPay allows you to buy now and pay later, offering flexible, interest-free payments for up to 6 months on all JR products. It’s easy to set up, and you can customize your repayment schedule to suit your budget. Payments can be made weekly, fortnightly, or monthly, with a $6 fee if the balance isn’t paid off by the due date.
Humm – Up to 12 Months Interest-Free
Humm provides interest-free payment plans on purchases up to $30,000, perfect for both small and large buys. For items over $2,000, you can spread payments over 12 months. Humm also offers flexibility in scheduling payments based on when you get paid
Afterpay – 8 Weeks, No Interest
With Afterpay, spread the cost of purchases across four equal installments, due every two weeks, over an 8-week period. There’s no interest, and as long as payments are made on time, there are no fees. Perfect for purchases between $100 and $1,500
Plenti Finance – For Reclaim Systems Only
Plenti Finance is available exclusively for Reclaim Energy systems. This option offers tailored repayment terms with competitive interest rates, helping make eco-friendly choices more affordable. For more detailed information on Plenti’s terms and eligibility for Reclaim systems, visit the Reclaim Energy finance page
If you're in Queensland and considering a new electric hot water system, JR Gas & Water is the company to choose. Here's why:
Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of electric hot water system installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.
Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your electric hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.
Competitive Pricing: JR Gas & Water offers competitive pricing for their electric hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.
Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.
Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your electric hot water installation, you are supporting a local business and contributing to the local economy.
Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.
Energy Efficiency: Electric hot water systems can be energy efficient, and JR Gas & Water can help you choose the right system for your needs. They can provide advice on energy-saving features and options, such as timers and thermostats, to help you save on your energy bills.
Safety: JR Gas & Water is committed to safety and ensuring that all installations are done to the highest safety standards. They are also familiar with local safety regulations and requirements, ensuring that your electric hot water system is installed safely and in compliance with all relevant codes.
JR Gas & Water is a reliable and experienced choice for your electric hot water system installation in Queensland. With a commitment to quality products, competitive pricing, excellent customer service, and safety, they can help you make the switch to a more efficient and cost-effective solution for your hot water needs. Contact them today to learn more about their services and how they can help you.