Vulcan Duomax 250L Electric Storage Hot Water System

The Vulcan Duomax 250L Electric Storage Hot Water System is available from Installed Today as a supply-only electric hot water unit or as a complete supply and install package in selected Brisbane and Gold Coast service areas, where available.

Choose the unit only if you already have a licensed plumber and electrician arranged, or check your supply and install package before checkout to confirm installation suitability, access, valve kit requirements, water pressure, electrical requirements, indoor or outdoor location and available installation timeframes.

The Vulcan Duomax 250L is an electric storage hot water system designed for small to medium-sized families with strong daily hot water demand. With 250L hot water delivery, a 3.6 kW single element, vitreous enamel lined cylinder and indoor or outdoor installation suitability, it is a practical replacement option for homes upgrading or replacing an existing electric storage hot water system.

About the Vulcan Duomax 250L Electric Water Heater

The Vulcan Duomax 250L is an electric storage hot water system that stores and heats water inside a vitreous enamel lined cylinder.

It is designed for small to medium-sized family homes that need more capacity than compact 50L, 125L or 160L systems, but may not need a larger 315L or 400L electric storage unit.

The 250L size can suit homes with moderate to high daily hot water use, depending on tariff setup, climate, shower length, shower flow rates, baths, laundry use and household routines.

Buy Vulcan Duomax 250L Supply Only

Buy the Vulcan Duomax 250L supply only if you already have a licensed plumber and electrician arranged for installation.

The product price is for the unit only. Installation, valve kits, old system removal, disposal, electrical work, pipework changes, pressure control, access changes, base or tray requirements and compliance upgrades are not included unless selected separately as add-ons or part of an available install package.

Common search terms this product suits include:

• Vulcan Duomax 250L price

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• 6D1250G7 electric water heater

• 661250G7 Vulcan electric water heater

• 250L electric storage hot water system

• 3.6 kW electric hot water system

• Medium electric hot water system

• Vulcan 250L supply only

Vulcan Duomax 250L Supplied and Installed in Brisbane & Gold Coast

The Vulcan Duomax 250L can be ordered with a supply and install option in selected Brisbane and Gold Coast service areas, where available.

The installed-from price is based on the product plus the selected standard installation option. Final pricing can vary depending on site conditions and any selected add-ons.

Extra work or add-ons may be required for:

• Valve kit replacement

• Old system removal

• Disposal

• Electrical work

• Circuit or isolator changes

• Pipework changes

• Water pressure control

• Base or tray requirements

• Restricted access

• Indoor drainage requirements

• Outdoor weather exposure requirements

• Relocation from the existing hot water position

• Non-compliant existing installation

• Team lift or delivery access requirements

Vulcan Duomax 250L Installation in Brisbane

Installed Today can help Brisbane customers order the Vulcan Duomax 250L as either a supply-only electric water heater or a supplied and installed package in selected service areas.

This model may suit Brisbane homes replacing an older 250L electric storage hot water system, especially where the existing location already suits a similar cylinder size and the electrical supply is suitable for a 3.6 kW single element unit.

Before installation, the site should be checked for access, drainage, water pressure, electrical supply, valve condition, pipework, base condition, weather exposure, lifting access and compliance requirements.

Vulcan Duomax 250L Installation in Gold Coast

Gold Coast homeowners, landlords, renovators and property managers can order the Vulcan Duomax 250L for supply only or supply and install where available.

This system may suit family homes, townhouses, rental homes and investment properties needing a reliable medium-sized electric storage hot water replacement. Final installation suitability depends on the existing hot water location, plumbing, electrical supply, water pressure, access, base condition and whether any additional parts or labour are required.

Is the Vulcan Duomax 250L Right for Your Home?

This system may suit you if:

• You want a 250L electric storage hot water system

• You are replacing an existing electric water heater

• Your household has moderate to high hot water usage

• You want a single element electric water heater

• You want a vitreous enamel lined cylinder

• You want a system suitable for indoor or outdoor installation where compliant

• You have suitable access, water pressure, drainage and installation space

• You have a suitable electrical connection or can arrange electrical work

• You want the choice of supply only or supply and install

Extra work may be required if:

• The system is being moved to a new location

• Existing valves are old, missing or non-compliant

• Electrical upgrades are required

• The existing circuit does not suit the 3.6 kW element

• Drainage or safe tray requirements apply

• Water pressure control is required

• Pipework changes are required

• Access is restricted

• The old system needs removal or disposal

• The installation area does not suit the tank size, weight or service access

• A smaller or larger system is better suited to the household’s usage pattern

Key Features of the Vulcan Duomax 250L

• 250L electric storage hot water system

• Vulcan Duomax style

• Manufacturer part number: 6D1250G7

• Vulcan product reference: 661250G7

• Tradelink product code: 309824

• 3.6 kW single element

• Lead free model listing

• 250L hot water delivery

• Suitable for small to medium-sized families with strong hot water demand

• Maximum listed people serviced: 8, based on stated usage conditions

• Vitreous enamel lined cylinder

• Suitable for internal and external installation where compliant

• Suitable for connection to off-peak tariff

• Rp 3/4 hot water connections

• Dual handed connections listed by Tradelink

• 850 kPa ECV setting

• 680 kPa maximum water supply pressure with ECV

• 800 kPa maximum water supply pressure without ECV

• 1000 kPa relief valve pressure

• 74 kg empty weight on Vulcan specification

• 75 kg approximate empty weight on Tradelink listing

• 80 kg shipped weight on Vulcan specification

• 1395 mm high x 640 mm wide x 680 mm deep

• WaterMark approved

• 10 year cylinder warranty and 12 months parts and labour listed in product specification, subject to current warranty terms

Quick Specs

Brand: Vulcan
Range: Duomax
Product: Vulcan Duomax 250L Electric Water Heater
Product Code: 661250G7
Manufacturer Part Number: 6D1250G7
Tradelink Product Code: 309824
System Type: Electric storage hot water
Fuel Type: Electric
Tank Volume / Hot Water Delivery: 250L
Recommended Household Size: Small to medium family homes, up to 8 people based on stated usage conditions
Installation Type: Internal or external where suitable
Element Type: Single element
Element Rating: 3.6 kW
Tariff Suitability: Suitable for connection to off-peak tariff
Cylinder Type: Vitreous enamel lined cylinder
System Connections: Dual handed listed by Tradelink
Water Connections: Rp 3/4
ECV Setting: 850 kPa
Maximum Water Supply Pressure with ECV: 680 kPa
Maximum Water Supply Pressure without ECV: 800 kPa
Relief Valve Pressure: 1000 kPa
Dimensions: 1395 mm high x 640 mm wide x 680 mm deep
Tank Diameter / Width: 640 mm
Weight Empty: 74 kg listed by Vulcan, 75 kg listed by Tradelink
Weight Shipped: 80 kg listed by Vulcan
Lead Free: Yes, based on trade listing
WaterMark: Yes
Warranty: 10 year cylinder warranty and 12 months parts and labour listed in product specification, subject to current warranty terms

Vitreous Enamel Lined Cylinder

The Vulcan Duomax 250L uses a vitreous enamel lined cylinder. This lining helps protect the inside of the cylinder and supports long-term electric storage hot water performance when the system is installed and maintained correctly.

Water quality, pressure control, correct valve selection and compliant installation all play an important role in the service life of any electric storage water heater.

250L Storage Capacity

The 250L capacity makes this Vulcan Duomax model suitable for many small to medium-sized family homes.

It may suit households that need more capacity than a 160L electric water heater but do not require the extra stored volume of a 315L or 400L system. The right size still depends on shower length, shower flow rates, baths, laundry use, climate, tariff setup and household routines.

Single 3.6 kW Element

The Vulcan Duomax 250L model requested is the 3.6 kW single element version.

A 3.6 kW element can suit many replacement installations where the existing electrical setup is compatible. Electrical suitability must still be checked before installation. Electrical work, circuit changes, isolator upgrades or compliance upgrades are not included unless selected or arranged separately.

Off-Peak Tariff Suitability

The Vulcan 250L electric water heater is listed as suitable for connection to off-peak tariff.

This can suit electric storage systems where the tank heats during off-peak electricity periods and stores hot water for later use. Tariff setup, recovery time and household usage should be checked before choosing the system.

Internal or External Installation

The Vulcan Duomax 250L is suitable for internal or external installation where the location meets the required plumbing, drainage, access, electrical and compliance requirements.

For indoor installations, safe tray, drainage, service access and leak protection requirements should be checked before installation.

For outdoor installation, the system location must be suitable for weather exposure, service access, plumbing connections, base support and electrical compliance.

Dual Handed Connections

The Tradelink listing identifies the Vulcan Duomax 250L as having dual handed system connections.

Dual handed connections can help with replacement flexibility because they may reduce pipework changes compared with single-sided connection layouts. The supplied model and existing pipework should still be checked before installation.

Water Pressure Requirements

The Vulcan Duomax 250L has an ECV setting of 850 kPa, maximum water supply pressure of 680 kPa with ECV, maximum water supply pressure of 800 kPa without ECV and relief valve pressure of 1000 kPa.

If incoming water pressure is too high, pressure control may be required. Valve requirements should be checked before installation, especially when replacing older units where existing valves may be worn, missing or non-compliant.

Lead Free Model Listing

The Tradelink listing identifies this model as a lead free Duomax 250L electric water heater.

Lead free product listings are becoming increasingly important in plumbing product selection. Final suitability should still be confirmed against the product supplied, local requirements and the installer’s compliance checks.

Replacement Access Considerations

The Vulcan Duomax 250L is a medium-to-large electric storage unit. The Vulcan specification lists an empty weight of 74 kg and shipped weight of 80 kg, while the trade listing shows approximately 75 kg empty weight.

Before installation, access should be checked carefully. Stairs, narrow side access, steep blocks, cupboard locations, raised platforms, tight laundry spaces and difficult delivery paths may affect installation requirements.

Vulcan Duomax 250L vs 315L Electric Storage

The Vulcan Duomax 250L is smaller than a 315L electric storage unit and may suit homes with moderate daily hot water demand.

A 315L system may be better for larger families, longer shower use, higher occupancy, multiple bathrooms or homes that regularly run out of hot water with a smaller tank. The right size depends on usage patterns, tariff setup and whether the household needs more stored capacity.

Vulcan Duomax 250L vs 160L Electric Storage

The Vulcan Duomax 250L provides more stored hot water capacity than a 160L electric storage system.

A 160L model may suit smaller households, lower usage or compact replacement situations. The 250L model may suit households wanting more stored hot water without stepping up to a larger 315L or 400L unit.

Vulcan Duomax 250L vs Heat Pump Hot Water

A Vulcan Duomax 250L electric storage system uses an electric element to heat stored water. A heat pump uses heat from the surrounding air to heat water more efficiently under suitable conditions.

The Vulcan Duomax 250L may suit customers wanting a straightforward electric storage replacement. A heat pump may suit customers looking for an energy-efficient upgrade where the installation location has suitable airflow, drainage, electrical supply, noise considerations and available space.

Vulcan Duomax 250L vs Instant Electric Hot Water

The Vulcan Duomax 250L stores a set volume of hot water, while an instant electric system heats water as it flows through the unit.

A 250L storage system is generally better suited to whole-home hot water demand than most instant electric systems. Instant electric units may suit specific point-of-use applications but often require higher electrical capacity and may not suit family whole-home use.

Common Uses

• Electric hot water system replacement

• 250L electric storage replacement

• Small to medium-sized family homes

• Homes with moderate to high hot water usage

• Rental properties

• Investment properties

• Renovation projects

• Properties replacing an existing 250L electric unit

• Homes suited to off-peak electric hot water

• Indoor installations with compliant drainage and access

• Outdoor installations with suitable base and weather exposure

• Supply-only orders where a licensed installer is already arranged

• Supply and install orders in selected Brisbane and Gold Coast areas

Suitability depends on household size, hot water usage, tariff setup, installation location, plumbing condition, electrical supply, water pressure, access, drainage and compliance requirements.

Why Order From Installed Today?

Installed Today makes it easier to order the Vulcan Duomax 250L as either a supply-only product or a supplied and installed package where available.

You can choose the unit only if you already have a licensed plumber and electrician arranged, or select an installation option in eligible Brisbane and Gold Coast service areas. Valve kits and installation add-ons can be selected online where required, helping you build a clearer product and installation pathway before checkout.

Benefits of ordering from Installed Today include:

• Supply-only or supply and install options

• Brisbane and Gold Coast service area support

• Installed-from pricing shown separately from the product price

• Compatibility checks before installation

• Product-specific information to help compare models

• Optional add-ons available where suitable

• Clear separation between unit price, installation and extras

• Suitable for customers with their own licensed installer

Frequently Asked Questions

Can I buy the Vulcan Duomax 250L supply only?

Yes. You can buy the Vulcan Duomax 250L as a supply-only unit if you already have a licensed plumber and electrician arranged.

Can I get the Vulcan Duomax 250L installed in Brisbane?

Yes, supply and install may be available in selected Brisbane service areas, depending on location, access, site conditions and installation availability.

Can I get the Vulcan Duomax 250L installed in Gold Coast?

Yes, supply and install may be available in selected Gold Coast service areas, subject to service coverage, site suitability and installation availability.

Is installation included in the product price?

No. The product price is for the unit only unless you select an installed option. Installation, valve kits, disposal, old system removal, electrical work, pipework changes and other extras are not included unless selected separately.

What size is the Vulcan Duomax 250L?

The Vulcan Duomax 250L has 250L hot water delivery.

How many people is the Vulcan Duomax 250L suitable for?

Vulcan lists the 250L model as suitable for a maximum of 8 people based on stated usage conditions. Real suitability depends on shower length, water temperature, climate, outlet flow rates, tariff setup and household usage patterns.

What is the element size?

This model has a 3.6 kW single element.

Is it single element or twin element?

This model is listed as a single element electric water heater.

Can it be installed indoors?

Yes, it can be installed indoors where the location meets access, drainage, plumbing, electrical and compliance requirements.

Can it be installed outdoors?

Yes, it can be installed outdoors where the location is suitable and compliant.

Is it suitable for off-peak tariff?

Yes. Vulcan lists the 250L model as suitable for connection to off-peak tariff.

What are the dimensions?

The listed dimensions are 1395 mm high x 640 mm wide x 680 mm deep.

What does it weigh?

Vulcan lists the empty weight as 74 kg and shipped weight as 80 kg. Tradelink lists the approximate empty weight as 75 kg.

What are the water connections?

The listed water connections are Rp 3/4.

What is the ECV setting?

The listed ECV setting is 850 kPa.

What is the maximum water supply pressure?

The listed maximum water supply pressure is 680 kPa with ECV and 800 kPa without ECV.

What is the relief valve pressure?

The listed relief valve pressure is 1000 kPa.

Is it lead free?

The Tradelink listing identifies this model as lead free.

What is the manufacturer part number?

The Tradelink listing shows the manufacturer part number as 6D1250G7.

What is the Vulcan product code?

The Vulcan product page lists product references 661250G7, 661250G7/BL and 661250G8. For the 3.6 kW model, use 661250G7.

What is the Tradelink product code?

The Tradelink product code is 309824.

Does it have dual handed connections?

Yes. Tradelink lists the Vulcan Duomax 250L as having dual handed system connections.

Is it suitable for replacing an old 250L electric water heater?

Yes, it may be suitable for like-for-like replacement of an older 250L electric storage water heater, provided the location, connections, electrical supply, water pressure and compliance requirements are suitable.

What warranty does it have?

The product specification shows a 10 year cylinder warranty and 12 months parts and labour, subject to current warranty terms. Warranty details should be checked before purchase because warranty terms can depend on model, installation and manufacturer conditions.

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.

A Simpler Way to Buy Hot Water, Filters, Pumps and Plumbing Products

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.