JR GAS & WATER INSTALLER ASSESSMENT
Our Electric 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, installation, commissioning, service access and manufacturer 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: Dux
🔢 Model Number: 315T1
📦 Volume: 315L
📏 Width: 620 mm
📐 Height: 1765 mm
🌍 Manufactured In: Australia
🛠️ Cylinder / Heat Exchange Material: Steel Enamel
🛡️ Cylinder / Heat Exchange Warranty: 10 Years
🔇 Noise Level: NA dBa
⚖️ Dry Weight: 93 kg
⚡ Energy Source: Electric
📡 WiFi Controller: No
⏲️ Built-In Timer: No
💡 LED/LCD Status Indicator: No
📊 Coefficient of Performance (COP): 1
DUX ELECTRIC HOT WATER INSTALLATION
Dux Proflo 315L Installation Brisbane & Gold Coast
JR Gas & Water supplies, replaces and professionally installs the Dux Proflo 315L electric hot water system across eligible Brisbane, Gold Coast and surrounding South East Queensland service areas.
The Dux Proflo 315L is a large mains-pressure electric storage hot water system designed for family homes needing more stored hot water than a 250L system can provide. The current range includes the 315T1 single-element and 315T2 twin-element models, allowing the system to be matched more closely to household demand, tariff and recovery requirements.
Although marketed as a 315L system, Dux specifies a physical storage capacity of approximately 321 litres with a 315 litre hot-water delivery rating. The range uses commercial-grade Y-class enamel, a larger sacrificial anode, a moisture-resistant polymer base and water connections on both sides of the cylinder.
Dux Proflo 315L at a glance: the Proflo 315L is an Australian-made high-capacity electric storage system available as the 315T1 single-element or 315T2 twin-element model. Dux currently positions it for approximately 4–6 people. The single-element model uses 3.6kW heating, while the twin-element version is available with two 3.6kW or two 4.8kW elements depending on the exact configuration.
Dux Proflo 315L Supply & Installation at a Glance
Hot Water Delivery
315 litres rated hot-water delivery from an approximately 321L physical storage cylinder.
Dux Household Guide
Dux currently positions the Proflo 315L for approximately 4–6 people.
Element Options
Single-element and twin-element versions are available to suit different tariff and recovery requirements.
Installation Area
Eligible Brisbane, Gold Coast and surrounding JR Gas & Water service areas.
Who Is the Dux Proflo 315L Best For?
Medium to Larger Families
The 315L delivery capacity is designed for homes needing more stored hot water than a typical 250L system while avoiding the size and storage volume of a 400L cylinder.
Heavy Morning or Evening Demand
It can suit homes where several showers, bathrooms or hot-water fixtures are used through the same peak period.
Large Electric Storage Replacements
The Proflo 315L is particularly relevant where an existing 315L electric storage system is being replaced and conventional electric storage remains appropriate for the property.
PRODUCT SUITABILITY
Is the Dux Proflo 315L Right for My Home?
A Good Choice If...
You have medium to high family hot water demand, already have suitable electrical and plumbing services and want the simplicity of a conventional electric storage system.
Consider Another Option If...
Your household regularly uses less hot water than a 315L cylinder provides, or your priority is reducing water-heating electricity consumption through heat-pump or solar technology.
JR Should Check First If...
You are changing from single to twin element, changing electricity tariff, relocating the cylinder, installing indoors or are unsure whether the existing circuit, base, valves, access and drainage remain suitable.
How Many People Does the Dux Proflo 315L Suit?
Dux currently publishes a household guide of approximately 4–6 people for the Proflo 315L.
Household sizing should still be treated as a guide rather than a fixed rule. Shower length, fixture flow rates, baths, simultaneous hot-water use and the electricity tariff can all change how much stored hot water a property requires.
JR's broader electric-storage sizing approach also distinguishes between full-time, off-peak and dual-element operation because recovery opportunity matters alongside tank capacity.
If household demand is close to the upper end of the 315L range, JR can compare the single-element and twin-element versions or consider whether moving to a 400L system or another hot-water technology provides a better result.
How Does the Dux Proflo 315L Work?
The Proflo 315L is a conventional electric storage water heater. Cold water enters the cylinder and is heated by an electric immersion element controlled by the thermostat.
Hot water remains stored in the insulated cylinder until required at showers, taps or appliances. As hot water leaves the tank, incoming cold water replaces it and the electric heating element reheats the stored volume.
The 315T2 twin-element model adds an upper heating element. This allows an upper portion of the tank to be reheated separately during periods of increased demand, depending on the electrical and tariff configuration.
Because the Proflo uses resistance heating, element size, tariff, household consumption and available reheating time all affect recovery and running cost.
Key Features of the Dux Proflo 315L
315L Rated Delivery
Large stored-hot-water capacity suited to medium and larger households.
Commercial-Grade Enamel
Dux uses durable Y-class commercial-grade enamel inside the Proflo storage cylinder.
Larger Sacrificial Anode
Dux specifies a larger anode on its current 315L Proflo range to support tank protection and service life.
Polymer Base
The tough polymer base helps resist moisture and deterioration around the bottom of the cylinder.
Dual-Handed Connections
Water connections are provided on both sides of the tank, giving installers more flexibility when matching existing pipework.
Indoor or Outdoor Installation
Dux allows the Proflo 315L to be installed indoors or outdoors where the location satisfies the applicable installation requirements.
Dux Proflo 315L Specifications
| Brand | Dux |
|---|---|
| Range | Proflo Electric Storage |
| Single-Element Model | 315T1 |
| Twin-Element Model | 315T2 |
| Product Type | Mains-pressure electric storage hot water system |
| Physical Storage Capacity | Approximately 321L |
| Hot Water Delivery Rating | 315L |
| Dux Household Guide | 4–6 people |
| Single-Element Rating | 3.6kW |
| Twin-Element Options | 2 × 3.6kW or 2 × 4.8kW depending on exact configuration |
| Electrical Supply | 240V AC single phase |
| Overall Height | 1765mm |
| Tank Diameter | 620mm |
| Overall Diameter | 660mm |
| Cold Water Inlet Height | 195mm |
| Hot Water Outlet Height | 1530mm |
| Electrical Entry Height | 145mm |
| Empty Weight | Approximately 93kg |
| Relief Valve Pressure | 1000kPa |
| Relief Valve Temperature | 99°C |
| Installation | Indoor or outdoor where compliant |
| Hard Water Anode Option | Available |
| Country of Manufacture | Australia |
| Manufacturer Warranty | 10-year tank warranty; 1 year parts and labour, subject to Dux conditions |
Dux markets the system as 315L because its hot-water delivery rating is 315L. Current Dux technical data lists the physical storage volume at approximately 321L.
INSTALLATION REQUIREMENTS
What Is Required to Install the Dux Proflo 315L?
The Proflo 315L is a full-size storage cylinder, so access, support and electrical configuration need to be checked before installation.
Stable and level installation base
Support suitable for the filled cylinder weight
Access route large enough for the 660mm overall diameter
Cold-water supply connection
Hot-water outlet connection
Applicable pressure-control valves
Temperature-pressure relief valve and compliant discharge
Electrical circuit suitable for the chosen element configuration
Additional switching or wiring where twin element is selected
Appropriate electricity tariff or control arrangement
Indoor safe-tray and drainage requirements where applicable
Safe future service access
What's Included With Dux Proflo 315L Installation?
Standard Installation
Where the job qualifies as a suitable like-for-like replacement, the applicable JR package can include supply of the Dux Proflo 315L, removal of the existing heater where included, positioning of the replacement and connection to suitable existing plumbing and electrical services.
Compliance & Commissioning
The new water heater is connected, completely filled before energising, tested and commissioned for correct electrical heating, hot-water delivery and safe valve operation.
Possible Additional Work
Electrical circuit changes, twin-element wiring, tariff alterations, valve replacement, additional pipework, drainage modifications, relocation or support-base work can increase the installation scope.
How Much Does Dux Proflo 315L Installation Cost?
Current supplied-and-installed pricing is shown in JR's live product and installation selector above. This keeps current pricing, package options and availability inside the working Shopify product rather than hard-coding a price into the long-form content.
The final Dux Proflo 315L installation cost depends on whether the job is a straightforward replacement or requires electrical changes, twin-element wiring, valve upgrades, new plumbing, drainage work, relocation or internal-installation protection.
Access also matters. A location suitable for a smaller 250L water heater may not provide enough width or manoeuvring space for the larger 315L Proflo.
BRISBANE INSTALLATION
Dux Proflo 315L Installation Brisbane
JR Gas & Water supplies and installs the Dux Proflo 315L in Brisbane for suitable larger-family electric hot water replacements and new installations.
For a Brisbane replacement, JR considers whether 315L still suits the household before automatically matching the old tank size. Household occupancy, shower duration and bathroom use may have changed since the previous system was installed.
The existing electrical circuit, tariff, valves, relief drainage and support base also need to suit the new Proflo before the job can be treated as a straightforward replacement.
Eligible installation coverage extends across Greater Brisbane and surrounding areas including Logan, Ipswich, Redlands and Moreton Bay.
GOLD COAST INSTALLATION
Dux Proflo 315L Installation Gold Coast
JR Gas & Water also supplies and installs the Dux Proflo 315L on the Gold Coast across eligible service areas.
The 315L size can suit larger homes where a 250L storage heater is insufficient but a 400L cylinder would add unnecessary storage and physical size.
Access should be checked before ordering. The current Proflo is approximately 1765mm high and 660mm across overall, so gates, pathways and internal doorways need enough clearance to safely move the cylinder into position.
JR can assess access, electrical configuration and plumbing requirements before the final installation package is confirmed.
Can the Dux Proflo 315L Replace My Existing Hot Water System?
Replacing Another 315L Electric System
This is generally the most straightforward pathway where access, base, valves, drainage and electrical services remain suitable.
Replacing a 250L System
Moving from 250L to 315L can provide greater stored hot water capacity but requires checking the larger cylinder footprint and filled weight.
Downsizing From 400L
If household demand has reduced, a 315L system may now be sufficient and can avoid maintaining a larger 400L stored volume unnecessarily.
Replacing Another Brand
The Proflo can replace many comparable electric storage systems, but tank dimensions, connections, electrical setup and valves still need to be checked.
Changing From Gas
A gas-to-electric conversion can require electrical upgrades, plumbing changes and separate treatment of the redundant gas service.
Relocating the Cylinder
A new location can require additional plumbing, electrical cabling, relief drainage and support-base work and should be assessed separately.
Single Element or Twin Element Dux Proflo 315L?
315T1 Single Element
The 315T1 uses a 3.6kW electric element and provides conventional full-cylinder electric storage heating.
315T2 Twin Element
The 315T2 is available with 2 × 3.6kW or 2 × 4.8kW elements, depending on the exact model configuration. The additional upper element can provide faster access to reheated water during higher-demand periods.
The correct configuration depends on household demand, tariff and the property's electrical setup. A twin-element installation may require additional electrical switching and should not be treated as identical to a standard single-element replacement.
How Efficient Is the Dux Proflo 315L?
The Proflo 315L is a conventional electric-resistance storage water heater. Electrical energy is converted directly into heat inside the storage tank.
Dux uses approximately 50mm of dense foam insulation in its large Proflo range to reduce standing heat loss, but the system does not have the efficiency multiplier of a heat pump.
Running cost therefore depends heavily on household usage, electricity tariff, element configuration and how often the stored water needs reheating.
For customers primarily focused on reducing water-heating electricity consumption, a heat pump may also be worth comparing before choosing conventional electric storage.
Dux Proflo 315L vs Other Hot Water Sizes
| Option | Typical Application | Main Difference |
|---|---|---|
| 250L Electric Storage | Medium family demand | Smaller cylinder with less stored hot water |
| Dux Proflo 315L | Medium to larger family demand | 315L delivery with single- or twin-element configurations |
| Dux Proflo 400L | Very large household or heavy peak demand | Greater stored volume and substantially larger physical cylinder |
| Heat Pump Hot Water | Homes prioritising lower water-heating energy use | Uses ambient-air heat rather than direct electric resistance as the primary heat source |
COMMON QUESTIONS
Dux Proflo 315L Installation FAQs
How much does Dux Proflo 315L installation cost?
Use JR's live product and installation selector for current supplied-and-installed pricing. Final cost depends on access, plumbing, valves, electrical configuration, drainage, tariff and whether the job qualifies as a standard like-for-like replacement.
Can JR Gas & Water install the Dux Proflo 315L in Brisbane?
Yes. JR supplies and installs suitable Dux electric storage systems across eligible Greater Brisbane and surrounding South East Queensland areas.
Can JR install the Dux Proflo 315L on the Gold Coast?
Yes. Professional Dux Proflo 315L installation is available across eligible Gold Coast service areas.
How many people does the Dux Proflo 315L suit?
Dux currently publishes a guide of approximately 4–6 people. Actual suitability depends on shower length, baths, fixture flow rates, tariff and simultaneous hot-water use.
Is the tank exactly 315 litres?
Dux currently specifies approximately 321L physical storage capacity with a 315L hot-water delivery rating.
What are the Dux Proflo 315L model numbers?
The single-element model is 315T1, while the twin-element model is 315T2.
What element size does the Dux Proflo 315L use?
The 315T1 uses a 3.6kW element. The 315T2 is available with 2 × 3.6kW or 2 × 4.8kW configurations depending on the exact model.
What are the Dux Proflo 315L dimensions?
Dux currently publishes approximately 1765mm overall height, 620mm tank diameter and 660mm overall diameter.
How heavy is the Dux Proflo 315L?
The current Dux technical data lists an empty weight of approximately 93kg. Once full, the combined water and cylinder mass is well over 400kg, so the installation base must be suitable.
Can the Dux Proflo 315L be installed indoors?
Yes. Dux lists the Proflo 315L for indoor or outdoor installation where the applicable access, drainage, safe-tray and servicing requirements are satisfied.
Does the Dux Proflo 315L use a sacrificial anode?
Yes. The enamel-lined Proflo uses a sacrificial anode as part of the tank-protection system. Dux also provides a separate hard-water anode option.
What warranty does the Dux Proflo 315L have?
Dux currently publishes a 10-year tank warranty and 1-year parts and labour warranty, subject to its full warranty conditions.
What is included with a standard installation?
The applicable JR package can include supply, installation in a suitable existing position, connection to compliant services, testing and commissioning. Electrical, valve, drainage, access or relocation work outside the standard package may cost extra.
Dux Proflo 315L Warranty and Maintenance
Tank Warranty
Dux currently provides a 10-year tank warranty on the Proflo 315L, subject to its complete manufacturer warranty conditions.
Parts & Labour
Dux currently lists 1 year parts and labour coverage outside the longer tank warranty.
Anode Maintenance
The Proflo uses a sacrificial anode as part of its cylinder-protection system. Dux lists replacement black and blue hard-water anodes specifically for the 315T1 and 315T2 models.
Dux's manufacturer warranty is separate from any applicable JR Gas & Water Lifetime Warranty or workmanship coverage associated with the selected installation package.
Why Choose JR Gas & Water for Dux Proflo 315L Installation?
JR Gas & Water currently lists the Dux 315L as a professionally supplied-and-installed, Lifetime Warranty eligible hot water product.
For a 315L replacement, JR considers household demand, tank dimensions, access, single- or twin-element configuration, tariff, electrical circuit, valves, drainage and installation position before confirming the final scope.
This helps distinguish a straightforward like-for-like replacement from a job requiring electrical alterations, relocation or other additional work.
COMPARE YOUR OPTIONS
Compare Dux & Electric Hot Water Systems
Hot Water Systems
Compare JR's current electric, heat pump, gas and solar hot water systems.
Electric Hot Water Systems
Compare current electric storage capacities, brands and installation configurations.
Dux Hot Water Systems
Compare JR's current Dux hot water range and installed options.
READY TO INSTALL
Install the Dux Proflo 315L With JR Gas & Water
The Dux Proflo 315T1 and 315T2 provide a large-capacity conventional electric storage option for homes needing more hot water than a 250L cylinder can deliver. The range combines commercial-grade enamel, a larger sacrificial anode, polymer base, dual-handed plumbing connections and the choice between single- and twin-element configurations.
JR Gas & Water supplies and installs suitable Dux Proflo 315L systems across eligible Brisbane and Gold Coast areas. Choose the applicable installation package and preferred date above, or use JR's quote pathway where the job involves difficult access, twin-element electrical work, relocation, internal-installation complexity or other non-standard requirements.
Your electric storage hot water system is built to provide years of reliable hot water, but like any major household appliance, it requires regular maintenance to remain safe, efficient and covered under the manufacturer's warranty.
Many manufacturers specify routine maintenance throughout the life of the system. Following these recommendations helps maximise the lifespan of the unit, maintain safe operation and reduce the likelihood of unexpected breakdowns.
Homeowner Maintenance – Every 6 Months
Every six months, homeowners should carefully operate the Pressure & Temperature Relief (PTR) Valve and Expansion Control Valve (ECV) (where fitted).
This simple maintenance helps:
- Confirm the safety valves are operating correctly.
- Flush away mineral deposits that can cause the valves to seize.
- Prevent excessive pressure from building inside the tank.
- Extend the life of the safety valves.
Why is this important?
Over time, minerals naturally found in water can build up inside the valves. If they are never operated, they may become stuck or fail when they're needed most.
A seized PTR or ECV valve can lead to:
- Excessive pressure inside the tank.
- Continuous leaking from the valve.
- Reduced system efficiency.
- Premature component failure.
- Potential safety risks.
Important: Always follow your manufacturer's instructions when operating the 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 Hot Water Health Check
Recommended Service – $99
While homeowner maintenance is important, a professional inspection provides additional peace of mind and can identify issues long before they become expensive repairs.
Our JR 6-Month Hot Water Health Check includes:
- Inspection for water leaks and corrosion.
- Testing of the PTR valve.
- Testing of the ECV (where fitted).
- Checking electrical operation.
- Inspecting wiring and electrical connections.
- Checking thermostat operation.
- Inspecting the element for signs of failure (where possible).
- Inspecting insulation and pipework.
- Checking for unusual noises or signs of sediment build-up.
- Confirming correct operation and water heating performance.
- Identifying any components showing signs of wear.
Service Price: $99
Regular inspections help detect small problems early, reducing the likelihood of unexpected breakdowns and helping maximise the life of your hot water system.
Recommended 5-Year Major Service
Current Price: $449
Most electric storage hot water manufacturers recommend replacing several key components approximately every five years to maintain reliable operation and protect the storage tank.
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 hot water system.
- Electrical safety and operational testing.
- Inspection of pipework, valves and fittings.
- Leak and corrosion inspection.
- System performance testing.
Why These Components Matter
Sacrificial Anode
The sacrificial anode protects the steel tank from internal corrosion.
Instead of the tank rusting, the anode slowly corrodes over time. Once it has been consumed, the tank itself begins to rust from the inside, often leading to leaks and complete tank failure.
Replacing the anode is one of the most effective ways to extend the life of a storage hot water system.
Pressure & Temperature Relief (PTR) Valve
The PTR valve is one of the most important safety devices on your hot water system.
It automatically releases water if pressure or temperature inside the tank becomes too high, protecting both the system and your home.
Over time, scale and mineral deposits can prevent the valve from operating correctly, making regular testing and replacement essential.
Expansion Control Valve (ECV)
The ECV manages pressure created as water expands during heating.
A correctly functioning ECV:
- Reduces stress on the storage tank.
- Protects plumbing components.
- Helps extend the life of the hot water system.
- Reduces unnecessary water discharge through the PTR valve.
If Your Hot Water System Isn't Working
Before arranging a service, there are a few simple checks you can perform:
- Ensure the power is switched on at the electrical switchboard.
- Check whether the hot water circuit breaker or safety switch (RCD) has tripped.
- Confirm the isolation switch near the hot water system is turned on.
- Check whether your electricity supplier has scheduled an off-peak interruption.
- Look for obvious water leaks around the system.
- Check whether water is continuously flowing from the PTR or ECV valve.
- Listen for unusual noises such as excessive boiling, rumbling or banging.
- Confirm the system has had sufficient time to reheat after heavy water usage.
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:
- Water leaking from the tank.
- Constant dripping from relief valves.
- Rust-coloured or dirty hot water.
- Reduced hot water capacity.
- Water taking much longer to heat.
- Unusual noises during heating.
- Visible corrosion.
- Fluctuating water temperature.
- Repeated electrical trips.
Early repairs are often significantly less expensive than replacing a failed hot water system.
Protect Your Warranty & Maximise System Life
Regular maintenance not only helps keep your hot water system operating safely and efficiently—it can also assist in meeting manufacturer maintenance requirements.
Ignoring recommended servicing may result in:
- Premature tank corrosion.
- Seized or leaking safety valves.
- Reduced efficiency and higher running costs.
- Unexpected loss of hot water.
- Avoidable repair costs.
- Shortened system lifespan.
- Possible reduction or loss of manufacturer warranty, depending on the manufacturer's maintenance requirements.
A small investment in preventative maintenance can add years to the life of your hot water system and help avoid the inconvenience and expense of an unexpected replacement.
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.