DUX PROFLO ELECTRIC STORAGE HOT WATER
Dux Proflo 400L Electric Hot Water System – 400T1 & 400T2
The Dux Proflo 400L Electric Hot Water System is a large-capacity electric storage water heater designed for Australian homes requiring substantial stored hot water and full mains-pressure delivery.
Dux offers the 400L Proflo in two configurations: the 400T1 single-element model with a 3.6kW element and the 400T2 twin-element model with two 3.6kW elements. Both have an actual storage capacity of 415 litres and a rated hot-water delivery of 400 litres.
Installed Today offers the Dux Proflo 400L as a supply-only system or with supply and installation across eligible Brisbane and Gold Coast service areas.
Dux Proflo 400L at a glance: a large Australian-made electric storage water heater available as the 400T1 single-element or 400T2 twin-element model. Dux rates the 400L size for approximately 5–9 people depending on usage, with indoor or outdoor installation, dual-sided plumbing connections, full mains-pressure delivery and a 10-year tank warranty for qualifying single-family dwelling installations.
WHAT IT DOES
About the Dux Proflo 400L Electric Hot Water System
The Proflo 400L stores a large volume of heated water so it is ready for use throughout the home. Dux's large electric storage range supplies hot water at full flow pressure to connected outlets and is designed as a practical replacement option for existing electric storage systems.
The 400L model is particularly relevant to larger households and properties with substantial daily hot-water demand. Dux currently lists the model for approximately 5–9 people, although actual suitability depends on shower duration, appliance use, electricity tariff, recovery time and household habits.
WHO IT SUITS
Who Is the Dux Proflo 400L Best For?
Larger Households
Dux lists the Proflo 400L for approximately 5–9 people, making it relevant to homes with higher stored-hot-water demand.
Large Electric Storage Replacements
The Proflo range is designed with replacement installations in mind, including hot and cold water connections on both sides of the tank.
Indoor or Outdoor Locations
Dux lists the 400L Proflo for either indoor or outdoor installation where the selected location complies with the manufacturer's installation requirements.
PRODUCT AT A GLANCE
Dux Proflo 400L Key Details
400L
Hot Water Delivery
415L
Actual Storage Capacity
5–9 People
Dux Sizing Guide
10 Years
Tank Warranty*
*The 10-year tank warranty applies to qualifying single-family dwelling installations. Dux specifies a 3-year tank warranty for all other applications and 1 year parts and labour. Full warranty conditions apply.
MODEL OPTIONS
Dux 400T1 vs 400T2
| Feature | 400T1 | 400T2 |
|---|---|---|
| Configuration | Single element | Twin element |
| Storage Capacity | 415L | 415L |
| Hot Water Delivery Rating | 400L | 400L |
| Element Size | 3.6kW | 2 × 3.6kW |
| Twin Element Boost Capacity | Not applicable | 80L |
| Empty Weight | 115kg | 115kg |
| Dimensions | Same tank dimensions | Same tank dimensions |
The correct element configuration depends on the property's electrical supply, tariff arrangement and hot-water requirements. Electrical suitability should be confirmed before ordering.
SIZING
Is a 400L Electric Hot Water System Right for Your Home?
The Dux Proflo 400L is one of the largest models in the Proflo electric storage range. Dux lists it for approximately 5–9 people, but household size alone should not be used to select a hot-water system.
Hot-water demand can vary significantly between homes. Long showers, several bathrooms, high simultaneous demand and appliances using hot water can increase the storage requirement.
It May Suit You If...
You are replacing an existing large electric storage heater or your household has substantial daily hot-water demand.
Check the Tariff
Electric storage performance and recovery depend on when electricity is available. Continuous and off-peak tariff arrangements can produce different sizing requirements.
Check the Existing Site
The tank is large and heavy, so access, base support, plumbing, drainage and electrical suitability need to be confirmed before installation.
KEY FEATURES
Key Features of the Dux Proflo 400L
Australian Made
Dux manufactures its 80L–400L Proflo large electric storage range in Australia for Australian homes and conditions.
Dual-Handed Plumbing
Hot and cold water connections are provided on both sides of the tank to make compatible replacement installations more flexible.
Commercial Grade Enamel
The tank uses durable Y-class commercial-grade enamel together with a larger sacrificial anode for corrosion protection.
Rust-Resistant Polymer Base
A hard-wearing polymer base is designed to resist moisture and damage around the bottom of the cylinder.
Dense Foam Insulation
Dux specifies 50mm thick dense foam insulation across its large Proflo electric range to reduce stored heat loss.
Lead-Free Certified Range
Dux states that the current Proflo electric storage range is certified lead-free.
TECHNICAL DETAILS
Dux Proflo 400L Specifications
| Specification | Dux Proflo 400L |
|---|---|
| Brand | Dux |
| Range | Proflo Electric Storage |
| Model Numbers | 400T1 single element / 400T2 twin element |
| Nominal Product Size | 400L |
| Actual Storage Capacity | 415L |
| Hot Water Delivery Rating | 400L |
| Recommended Household Size | Approximately 5–9 people, depending on usage |
| 400T1 Element | 1 × 3.6kW |
| 400T2 Elements | 2 × 3.6kW |
| 400T2 Boost Capacity | 80L |
| Electrical Supply | 240V AC single phase |
| Empty Weight | 115kg |
| Relief Valve Pressure | 1000 kPa |
| Maximum Inlet Pressure | 800 kPa |
| Installation | Indoor or outdoor |
| Water Connections | Dual-sided / dual-handed |
| Tank Protection | Y-class commercial-grade enamel and sacrificial anode |
| Base | Hard-wearing polymer base |
| Hard Water Option | Available |
| Manufacturing | Made in Australia |
| Tank Warranty – Single Family Dwelling | 10 years |
| Tank Warranty – Other Applications | 3 years |
| Parts & Labour Warranty | 1 year |
DIMENSIONS
Dux Proflo 400L Dimensions
1705mm
Overall Height
705mm
Tank Diameter
745mm
Overall Diameter
115kg
Empty Weight
| Dimension | Measurement |
|---|---|
| Overall Height | 1705mm |
| Tank Diameter | 705mm |
| Overall Diameter | 745mm |
| Cold Water Inlet Height | 220mm |
| Hot Water Outlet Height | 1445mm |
| Electrical Entry Height | 170mm |
Allow additional room for plumbing, valves, servicing access and anode replacement. Dux requires the water heater to remain accessible for servicing.
INSTALLATION LOCATION
Can the Dux Proflo 400L Be Installed Indoors or Outdoors?
Yes. Dux lists the Proflo 400L for indoor or outdoor installation.
The installation location still needs to meet Dux requirements. The water heater should be installed on a flat, solid supporting surface, positioned so the compliance plate and service components remain accessible.
For indoor installations, Dux requires appropriate consideration of safe-tray and drainage provisions where water leakage could cause property damage.
INSTALLATION REQUIREMENTS
What Is Required to Install a Dux Proflo 400L?
Dux states that the Proflo electric storage water heater must be installed by a licensed tradesperson and in accordance with applicable plumbing, electrical and local authority requirements.
- Suitable structural base for the large storage cylinder
- Compatible hot and cold water plumbing
- Correct pressure and temperature relief valve arrangement
- Suitable cold-water valve arrangement
- Compliant drainage from relief valves
- Correct electrical circuit for the selected model
- 240V AC single-phase electrical supply
- Access for thermostat, element, relief valve and anode servicing
- Safe-tray and drainage provisions where required indoors
- Suitable tempering arrangements where required by regulations
- Compliance with applicable plumbing requirements
- Compliance with AS/NZS 3000 electrical requirements
FULL MAINS PRESSURE
Full Mains-Pressure Hot Water
The Dux Proflo electric storage range is designed to deliver full flow pressure to connected outlets.
This makes the Proflo 400L a practical replacement option where a household already uses mains-pressure electric storage hot water and wants a large stored-water capacity.
Actual outlet performance also depends on the property's incoming supply pressure, pipe sizing, valve arrangement and plumbing system.
INSULATION & HEAT LOSS
50mm Dense Foam Insulation
Dux specifies 50mm thick dense foam insulation for its large Proflo electric storage range.
The insulation reduces heat loss from stored water, helping the tank retain heat between heating cycles. Dux also publishes Proflo performance against Australia's Minimum Energy Performance Standards across the range.
Actual running cost depends on household hot-water use, electricity tariff, climate, thermostat operation and the selected single- or twin-element configuration.
HARD WATER
Is There a Hard Water Option?
Yes. Dux lists a hard-water option for the Proflo 400L.
Dux publishes separate sacrificial anodes for average-to-hard water and extremely hard water areas. Correct anode selection and maintenance can be important where local water chemistry is aggressive.
If the property's water quality is unusual, confirm the appropriate model and anode configuration before installation.
SUPPLY ONLY
Buy the Dux Proflo 400L Supply Only
Choose supply only if you need the Dux Proflo 400L unit and already have suitable licensed trades arranged for installation.
The supply-only price covers the selected hot-water system itself. Installation, site-specific valves, electrical modifications, plumbing changes, compliant bases or trays, old-unit removal and disposal are separate unless specifically included in the selected order.
Before ordering, confirm whether you require the 400T1 single-element or 400T2 twin-element model.
SUPPLY & INSTALL
Dux Proflo 400L Supplied & Installed
Supply Only
Order the unit by itself where a suitable licensed plumber and electrician are already arranged.
Brisbane Installation
Eligible Brisbane customers can check available supply-and-install options for replacing a compatible electric storage hot-water system.
Gold Coast Installation
Eligible Gold Coast customers can also check available installation options and any additional site requirements before checkout.
AUSTRALIA-WIDE SUPPLY
Buy the Dux Proflo 400L Across Australia
Installed Today offers supply-only ordering across supported Australian delivery areas, with local installation options available in eligible Brisbane and Gold Coast locations.
Customers outside the local installation area can order the correct unit for delivery where available and arrange compliant installation with suitable licensed trades.
Brisbane
Gold Coast
Sydney
Melbourne
Adelaide
Perth
BRISBANE INSTALLATION
Dux Proflo 400L Installation Brisbane
Eligible Brisbane customers can order the Dux Proflo 400L with an installation option where available. The simplest installations are generally compatible replacements where the existing location, plumbing, drainage and electrical supply already suit the selected model.
Additional work may be required where valves need replacement, electrical circuits need modification, pipework must be changed, access is restricted or the existing installation does not meet current requirements.
The 400L cylinder is approximately 1705mm high, 745mm overall diameter and 115kg empty, so access and base suitability should be checked before ordering.
GOLD COAST INSTALLATION
Dux Proflo 400L Installation Gold Coast
Eligible Gold Coast customers can also select supply-and-install options for the Dux Proflo 400L where available.
Before installation, the existing water heater location, valve arrangement, drainage, power supply, access and model configuration should be confirmed. A twin-element 400T2 replacement can have different electrical requirements from a single-element 400T1 installation.
WHAT MAY REQUIRE EXTRA WORK
Check These Items Before Ordering Installation
- Moving the hot-water system to a new location
- Old or non-compliant isolation and pressure-control valves
- Additional pipework or drainage changes
- Electrical circuit or switchboard work
- Changing from single element to twin element
- Restricted or difficult site access
- New compliant base or support requirements
- Safe tray or drainage requirements for indoor installations
- Old system removal and disposal
- Additional tempering or compliance work
WARRANTY
Dux Proflo 400L Warranty
The warranty varies according to how the water heater is used.
| Application | Tank Warranty | Parts & Labour |
|---|---|---|
| Single Family Dwelling | 10 years | 1 year |
| All Other Applications | 3 years | 1 year |
The warranty period generally starts from the installation date where proof is available; otherwise Dux states that the manufacturing date may be used. Warranty conditions include correct installation, suitable water pressure, correct electrical supply and operation in accordance with the owner's manual.
Do not assume the 10-year tank warranty applies to every rental, commercial, multi-residential or other non-single-family application. Dux's full warranty conditions determine coverage.
COMMON QUESTIONS
Questions About the Dux Proflo 400L
What is the difference between the Dux 400T1 and 400T2?
The 400T1 is the single-element model with one 3.6kW element. The 400T2 is the twin-element model with two 3.6kW elements and an 80L boost capacity.
Is the Dux Proflo 400L actually 400 litres?
Dux markets it as the 400L model because it has a 400L hot-water delivery rating. The current technical specification lists an actual storage capacity of 415 litres.
How many people is the Dux Proflo 400L suitable for?
Dux lists the 400L model for approximately 5–9 people. Actual suitability depends on household usage and electricity tariff conditions.
Can the Dux Proflo 400L be installed outdoors?
Yes. Dux lists the Proflo 400L for both indoor and outdoor installation where the location meets installation requirements.
Can the Dux Proflo 400L be installed indoors?
Yes. Indoor installation is permitted, but safe-tray and drainage requirements may apply where leakage could cause property damage.
Does the Dux Proflo 400L provide mains-pressure hot water?
Yes. Dux specifies full flow pressure to connected outlets.
What are the dimensions of the Dux Proflo 400L?
The current Dux technical information lists approximately 1705mm overall height and 745mm overall diameter, with a 705mm tank diameter.
How heavy is the Dux Proflo 400L?
The unit weighs approximately 115kg empty. Filled with water, the installed system is substantially heavier, so it requires a suitable supporting surface.
What is the maximum inlet pressure?
Dux's current specification lists a maximum inlet pressure of 800 kPa for the 400T1 and 400T2.
What electrical supply does the Dux Proflo use?
Dux states that the Proflo large electric range operates on 240V AC single-phase electricity. The electrical circuit must suit the selected single- or twin-element model.
Does it have plumbing connections on both sides?
Yes. Dux describes the Proflo large electric range as dual-handed, with water connections on both sides of the tank for compatible replacement installations.
Is the Dux Proflo 400L made in Australia?
Yes. Dux states that its Proflo 80L–400L large electric water heaters are manufactured in Australia.
Does it have a hard-water option?
Yes. Dux lists a hard-water option and publishes different sacrificial-anode options for different water conditions.
What is the warranty?
For a qualifying single-family dwelling, Dux specifies a 10-year tank warranty and 1-year parts-and-labour warranty. For all other applications, the tank warranty is 3 years with 1 year parts and labour.
Can I install the Dux Proflo 400L myself?
No. Dux states that the water heater must be installed by a licensed tradesperson and in accordance with applicable plumbing and electrical requirements.
Can I buy the Dux Proflo 400L supply only?
Yes. Installed Today offers a supply-only pathway for customers who already have suitable licensed installation arranged.
Can Installed Today install the Dux Proflo 400L?
Supply-and-install options are available in selected Brisbane and Gold Coast service areas. Final installation scope depends on access, plumbing, valves, drainage, electrical suitability, compliance requirements and the selected model.
WHY INSTALLED TODAY
Why Order the Dux Proflo 400L From Installed Today?
Supply Only
Unit Ordering
400T1 / 400T2
Model Options
Australia Wide
Supported Supply
Brisbane & Gold Coast
Installation Options
Installed Today gives you a clear pathway to buy the Dux Proflo 400L as a product-only order or combine it with an eligible local installation option. Before checkout, confirm the required model, existing electrical configuration, valves, access and any additional installation work.
FINAL CHECK
Is the Dux Proflo 400L Right for You?
The Dux Proflo 400L is suited to households requiring a large electric storage system with full mains-pressure delivery. It is particularly relevant when replacing an existing large electric cylinder and when the site already has suitable space, plumbing and electrical provision.
Choose between the 400T1 single-element and 400T2 twin-element configurations based on the property's electrical and tariff setup. For installation orders, check access, valves, drainage, electrical requirements and old-system removal requirements before confirming the job.
Tempering Valve and Element Information
*Element size information:
All electric hot water units are supplied as standard with a 3.6kW element unless otherwise stated on the product page, invoice, or order confirmation.
If a different element configuration is requested, such as 1.8kW or 2.4kW, the hot water unit may still arrive with the standard 3.6kW element fitted from the manufacturer. The requested 1.8kW or 2.4kW element will be supplied separately with the order for installation by a suitably licensed electrical contractor or licensed electrical licence holder.
Any element changeover, electrical connection, disconnection, wiring, testing, or modification must be carried out by a licensed electrical contractor or licensed electrical licence holder. Elements must not be changed, connected, modified, or tested by an unlicensed person.
Alternative elements supplied for non-standard configurations may be generic replacement elements and may not be the same brand as the hot water unit unless specifically stated. Generic elements are supplied to suit the requested element size and electrical configuration, but final suitability must be checked by the licensed installer before installation.
1.8kW and 2.4kW elements supplied separately with a hot water unit include a 12-month supply-only parts warranty from the date of purchase, provided the element has been correctly installed by a licensed electrical contractor or licensed electrical licence holder and used under normal operating conditions.
This element warranty covers the replacement supply of the element only. It does not include labour, call-out fees, electrical work, plumbing work, fault finding, removal, reinstallation, testing, travel, downtime, damage caused by incorrect installation, or any other associated costs. Warranty may be declined where the element has been incorrectly installed, dry-fired, modified, damaged, connected to incorrect voltage or wiring, affected by power issues, used in unsuitable water conditions, or installed by an unlicensed person.
Proof of purchase, installer details, electrical licence details, photos, and/or return of the faulty element may be required before a warranty claim is approved.
**Tempering valve information:
Where a hot water system is capable of delivering water above 50°C, a compliant tempering valve must be installed to control the temperature delivered to personal hygiene fixtures such as showers, baths, basins, and bathroom outlets. This helps reduce the risk of scalding and assists with meeting plumbing compliance requirements.
A tempering valve blends hot and cold water to deliver a safer controlled outlet temperature to required fixtures. The hot water unit itself may store water at a higher temperature, but the water delivered to personal hygiene outlets must be controlled where required by plumbing regulations.
If your property already has a suitable, compliant tempering valve installed, your licensed plumber can assess whether it is appropriate for use with the new hot water system. Existing valves may not always be suitable due to age, condition, compliance requirements, valve type, location, or system compatibility.
If a compliant tempering valve is not already installed, or if the existing valve is unsuitable, one must be supplied and installed by a licensed plumber as part of the hot water installation.
Tempering valves are not automatically included with every supply-only hot water unit unless specifically selected, listed as included, or purchased as part of a suitable valve kit. If a tempering valve is required, please purchase the appropriate valve kit with your order or arrange for your licensed installer to supply and install the correct tempering valve on site.
It is the customer’s responsibility to ensure the installation is completed by appropriately licensed trades and that all required valves, fittings, electrical work, plumbing work, and compliance requirements are allowed for as part of the installation.
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Buying a new hot water system, water filter, pump or plumbing product should be clear, simple and easy to organise.
Installed Today helps you compare products, check supply-only pricing and, where available, build an optional installation package before checkout. That means you can choose the product, review the available options and order with more confidence, without the usual back and forth just to understand the starting price.
Whether you already know exactly what you need or you are still comparing options, Installed Today gives you a clearer way to buy the right product for your home, budget and timing.
Why Customers Choose Installed Today
Supply Only or Optional Installation
Choose the product on its own, or add installation where available on selected products and in eligible service areas. This gives you the flexibility to order the way that suits you best.
Clear Pricing Before Checkout
See the product price upfront, then review available installation options and common add-ons before placing your order. You can check the package total before checkout, instead of waiting on basic pricing just to get started.
Product Details That Actually Help
Key specs, sizing details, warranty information, product features and suitability notes are shown clearly, making it easier to compare products properly before you buy.
Common Installation Add-Ons Available
Where relevant, you can add common installation extras such as valve kits, bases, access-related items, removal, electrical options or other site-specific upgrades before checkout.
Built Around Brisbane and Gold Coast Homes
Our product and installation options are selected with common Brisbane and Gold Coast homes in mind, including local water quality, access issues, plumbing layouts, replacement requirements and typical installation conditions.
One Simple Order
Add the product and selected options to cart in one order, instead of trying to organise separate suppliers, installers, parts and payments yourself.
Practical Help Before You Buy
Not sure which size, model or installation option is right? Installed Today gives you a clearer path to compare your options before you order.
Designed to Make Your Decision Easier
Installed Today is built for customers who want a faster, clearer and more convenient way to buy.
Instead of guessing what is included, waiting for basic pricing or trying to work out which extras may be needed, you can review the product, compare your options and move forward with confidence.
Choose supply only if you just need the product.
Choose an optional supplied and installed package where installation is available and you want the product and selected install options organised in one order.
Add common extras before checkout if your job needs additional parts, removal, access support or site-specific options.
It is a simpler way to organise the product, the selected extras and the parts of the job that matter most.
Important Installation Note
Installation availability, inclusions and add-ons vary by product type, service area, site access, existing services, selected options and property requirements.
Some jobs may require additional work, upgrades or checks before installation can proceed. Final suitability may need to be confirmed based on site conditions, plumbing, electrical requirements, valves, drainage, access and compliance requirements.
Supply-only orders do not include installation, old unit removal, disposal, valve kits, electrical work, plumbing alterations or compliance upgrades unless these are clearly selected or included in your order.
Fast Delivery and Install-Aligned Shipping
Installed Today makes delivery simple, whether you are ordering supply-only or choosing an optional install package.
For supply-only orders, you can select from available delivery options at checkout. For eligible orders with installation selected, shipping is included and coordinated to align with your selected installation period where possible.
Delivery Options
Same Day Delivery
Same day delivery may be available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 7:00am.
Availability depends on stock, courier capacity, delivery location, product type and safe transport conditions.
Express Delivery
Express delivery is available on selected products and locations, with an estimated delivery timeframe of 1–4 business days.
Standard Delivery
Standard delivery is available on selected products, with an estimated delivery timeframe of 2–8 business days.
Free Shipping with Installation
When you select an eligible installation package, delivery is included as part of the supplied and installed order.
Your product delivery will be organised to align with your selected installation period where possible, helping avoid separate courier timing, storage issues or delays between delivery and installation.
Fast Metro Delivery
Most hot water orders in metro areas are delivered quickly, with many arriving within 1 business day depending on stock, location, order time and courier availability.
Weather and Transport Delays
Hot water systems are large, heavy products and cannot always be transported safely during rain or unsafe handling conditions.
Delivery timeframes may be affected if wet weather impacts loading, unloading, transport access or safe delivery conditions.
Express Delivery Refund
If your express delivery order takes longer than the estimated 1–4 business day express timeframe, your order will move to the standard 2–8 business day delivery timeframe and your express shipping charge will be refunded automatically.
Order Tracking
We will send your delivery details once your order has been dispatched or scheduled.
For supplied and installed orders, delivery timing may be coordinated around your selected installation period rather than sent as a separate courier-only delivery.
Need Help with Delivery?
Not sure whether to choose supply-only delivery or an optional install package? Contact our team before ordering and we can help you understand the best option for your product, location and timing.
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