JR Gas and Water
Your cart is currently empty.
Did You Know a Heat Pump Could Save Your Family As Much 80% on Your Hot Water Energy Bills
View all
🏷️ Brand:
🔢 Model Number:
📦 Volume: L
📏 Width: mm
📐 Height: mm
🌍 Manufactured In:
🛠️ Heat Exchange Material:
🛡️ Cylinder/Heat-Exchange Warranty: Years
🔇 Noise Level: dBa
⚖️ Dry Weight: kg
📡 WiFi Controller:
⏲️ Built-In Timer:
💡 LED/LCD Status Indicator:
📊 Coefficient of Performance (COP):
⚡ Energy Source:
IMPORTANT - Default supply is Natural Gas — please leave a note at checkout if LPG is required where available.
Vulcan DUOMAX 26 Continuous Flow Gas Hot Water System – Supply & Installation Brisbane & Gold Coast
High performance. Maximum flow. Non-stop hot water for large families.
The Vulcan DUOMAX 26 is a powerful, energy-efficient continuous flow gas hot water system built to handle the demands of busy Australian households. Delivering 26 litres per minute, it’s designed for homes with 3+ bathrooms or families that run multiple taps and showers at once.
At JR Gas & Water, we supply and install the DUOMAX 26 across Brisbane and Gold Coast suburbs, delivering fast, licensed service with competitive packages to match your needs. As the 2023, 2024, and 2025 Best Plumbers and Best Home Care Store winners, we’re the team homeowners trust.
Key Features of the Vulcan DUOMAX 26
-
💧 26L/min flow rate – Ideal for homes with 2–3 bathrooms and 4+ people
-
🔥 Continuous hot water – No storage tank, no running out
-
🌡️ Precise temperature control – Optional bathroom controllers for safety and comfort
-
♻️ 6-Star energy rated – Reduces gas bills and emissions
-
⚙️ Natural Gas or LPG compatible – Flexible for any property
-
📦 Slimline outdoor unit – Perfect for external wall mounting
-
🇦🇺 Australian-made – Built tough with nationwide parts availability
Who’s It Best For?
✔ Families of 4 or more
✔ Homes with 2 or more bathrooms
✔ Upgrading from an undersized or electric hot water system
✔ Builders and renovators seeking a premium gas hot water solution
Why Choose JR Gas & Water?
-
🧰 End-to-end supply & install by licensed local experts
-
✅ QBCC Form 4 compliance certificate provided
-
🏆 3x award-winning customer service across SEQ
-
🧼 We remove your old system and leave the site clean
-
📅 Same-day or next-day installs available in most suburbs
-
💬 Advice tailored to your home layout & usage needs
Installation Packages Available
Base Package
For replacing an identical or compliant DUOMAX system. Fast swap with Form 4 and no major changes needed.
Silver Package
Includes new valves, compliant upgrades, and safe gas fittings for older or modified setups.
Gold Package
Full upgrade including all new valves, pipework, mounting brackets, insulation, a concrete support base, tempering valve (if needed), and removal of your old unit.
Common Questions
Q: Can the DUOMAX 26 handle multiple showers?
A: Yes! It can comfortably support 2–3 simultaneous showers with 26L/min flow.
Q: Is it compatible with LPG?
A: Yes, available in both LPG and natural gas models.
Q: What warranty does it come with?
A: 10 years on the heat exchanger and 3 years on parts and labour.
Q: Is this a tankless system?
A: Yes. The DUOMAX 26 is a continuous flow (tankless) system, meaning instant hot water without storage.
Q: Can I add controllers?
A: Optional temperature controllers are available for bathroom and kitchen zones.
Upgrade to High-Flow Hot Water with JR Gas & Water
No more cold showers. No more waiting. The Vulcan DUOMAX 26 is a dependable, efficient solution for large households that need hot water to keep up. Let our team of licensed plumbers handle your install quickly and properly.
👉 Explore more gas hot water systems or book your install today.
🔥 Instant Gas Hot Water System Package Selection Guide
(Please rotate your mobile device for easier viewing)
Choosing the right instant gas hot water system package depends on your current setup, whether plumbing or gas upgrades are needed, and if any relocation or compliance work is required. Use this guide to compare package levels and find the best match for your home.
We know things don’t always go to plan — and most customers aren’t plumbers — so we’re flexible and happy to adjust your installation package if needed.
💡 Which Package Is Right for You?
IMPORTANT: All online packages are for EXTERNAL installations only. For internal installations, please request a quote.
✅ Base – For compliant replacements of existing identical EXTERNAL instant systems
Best for like-for-like swaps where the existing system is fully compliant and the same make/model/series. No gas line changes, electrical work, or plumbing alterations.
🧰 Example: Replacing a Rinnai B26 with a Rinnai B26 on the same wall with compliant gas supply.
✅ Silver – For minor upgrades
Includes small plumbing adjustments and a new valve kit. No gas line modifications or system disposal. Designed for customers on a budget upgrading to a slightly different model.
🧰 Example: Replacing a Rheem 26 with a Rinnai B26 where the gas line is compliant but pipework needs modifying to suit and valves need replacing for warranty.
🏆 Gold – Best Seller – For standard installations
Covers everything needed for a standard upgrade: removal of old unit, plumbing changes, valves, and a tempering valve.
🧰 Example: Upgrading from an old Bosch 16P Instant to a new Bosch 16H that requires a tempering valve, with full plumbing refresh and removal of old unit.
💰 Sapphire – Best Value – For installations requiring gas upgrades
Everything in the Gold package plus gas line upgrades or a new gas main from meter to unit to ensure safe and compliant installation.
🧰 Example: Switching from a smaller capacity like a 13L to a larger 26L instant system that needs a larger gas main and full plumbing setup.
✅ Diamond – For major gas plumbing overhauls
Adds extended gas runs, upgraded regulators or meter connections and a new power point. Ideal for homes switching to gas or where old systems were severely non-compliant.
🧰 Example: Changing from electric to gas in a home with no current gas line in the right location, requiring a full line upgrade.
✅ Platinum – The ultimate package
Includes everything: relocation, extensive plumbing, and full gas installation or rerouting. Ideal for complex installs or new system placements.
🧰 Example: Moving the hot water system to the opposite side of the home and running a new gas line with full setup and all compliance.
🏆 Package Comparison Guide
Here’s your revised Package Comparison Guide with the new line added as the third row, directly under “Existing System Must Be Same Type & Location”:
| Feature | Base | Silver | Gold 🏆 | Sapphire 💰 | Diamond | Platinum |
|---|---|---|---|---|---|---|
| ✅ Existing System Must Be Identical Make/Model as Purchase with Compliant Installation | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ |
| ⚠️ Includes gas supply upgrade to suit larger capacity unit (e.g. 16L replaced with 16L or larger) | ❌ | ❌ | ❌ | ✅ | ❌ | ✅ |
| ✅ Form 4 (Compliance Certificate) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 🔧 Pipework Alterations | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 🔧 Valve Kit | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
| 📏 Pipework Included (m) | ❌ | 2m | 4m | 14m | 4m | 24m |
| 🧱 Support Base (if ground is soft/uneven) | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ |
| 🗑️ Old System Disposal | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ |
| 🔧 Powerpoint | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ |
| 🔥 Gas Line Upgrade / New Gas Main | ❌ | ❌ | ❌ | ✅ | ❌ | ✅ |
| 📦 System Relocation | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ |
| ✅ Requires Compliant Existing Install | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
🔧 Trusted Materials, Backed by Quality
We only use high-grade parts from reputable manufacturers:
-
Valves – AVG, RMC, Rye Metal
-
Copper Pipe – Kembla Type B, Crane
-
PEX Plumbing – Ezipex
-
Insulation – eFlex, K-Flex
-
Brassware – Brasshards
-
Gas Components – Bromic, EziPress, Viega
-
Sealants – Loxeal
Let us know if you have any specific brands or components you’d like us to use.
🛠 Need Help Choosing?
Still unsure which package is right for your home?
The JR Gas & Water team is here to help.
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.
