Vulcan Duomax 250L Electric Storage Hot Water System
Buy the Vulcan Duomax 250L Electric Storage Hot Water System online from Hot Water Outlet, with fast delivery available across Australia and same day delivery available in select metro areas on eligible orders.
The Vulcan Duomax 250L is an electric storage hot water system designed for small to medium-sized families, rental properties and homes with moderate to high daily hot water demand. With 250L hot water delivery, a 3.6 kW single element, vitreous enamel lined cylinder and indoor or outdoor suitability where compliant, it is a practical supply-only replacement option for customers upgrading or replacing an existing electric storage hot water system.
Hot Water Outlet supplies hot water systems, valves, pipework, fittings, connections, spare parts and accessories across Australia, making it easier to order the unit and related hot water parts in one place.
About the Vulcan Duomax 250L Electric Water Heater
The Vulcan Duomax 250L is an electric storage hot water system that heats and stores water inside a vitreous enamel lined cylinder.
It is designed for small to medium-sized households that need more stored hot water capacity than compact 50L, 125L or 160L electric hot water systems, but may not need the extra stored volume of a 315L or 400L unit.
The 250L size may suit family homes, townhouses, rental properties, investment properties and customers replacing an existing 250L electric storage system. The right size depends on daily usage, shower length, shower flow rates, baths, laundry use, tariff setup, climate and household routines.
Buy Vulcan Duomax 250L Supply Only
Hot Water Outlet sells the Vulcan Duomax 250L Electric Storage Hot Water System as a supply-only product for customers across Australia.
The product price is for the hot water system only. Installation, old system removal, disposal, valve kits, electrical work, plumbing alterations, pipework changes, pressure control, base or tray requirements and compliance upgrades are not included unless clearly stated on the product page or selected separately.
Supply only is best for customers who already have a licensed plumber and electrician arranged, or who want to order the unit online and organise installation separately.
Before ordering, confirm the model, size, electrical requirements, water pressure, connection layout, delivery access and installation requirements with your licensed installer.
Fast Delivery Across Australia
Hot Water Outlet supplies electric hot water systems, valves, fittings, pipework, spares and accessories across Australia.
Fast delivery is available on eligible stocked products, with same day delivery available in select metro areas depending on stock, order time, product size and delivery location.
The Vulcan Duomax 250L is a medium-to-large electric storage system, so delivery access should be checked before ordering. Consider driveway access, stairs, steep blocks, narrow side paths, unit complexes, raised platforms, tight laundries, loading zones and whether someone will be available to receive the delivery.
Is the Vulcan Duomax 250L Right for Your Home?
The Vulcan Duomax 250L may suit customers who need a practical electric storage hot water system with more stored capacity than a compact unit, but less volume than a larger 315L or 400L tank.
It may be suitable if:
You want a 250L electric storage hot water system
You are replacing an existing electric water heater
Your household has moderate to high daily hot water use
You want more stored capacity than a 160L electric system
You do not need the extra stored volume of a 315L or 400L unit
You want a single element electric water heater
You want a vitreous enamel lined cylinder
You need 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 already have a licensed plumber and electrician arranged
It may not be suitable without extra checks if:
The system is being moved to a new location
Existing valves are old, missing or unsuitable
Electrical upgrades are required
The existing circuit does not suit a 3.6 kW element
Drainage or safe tray requirements apply
Water pressure control is required
Pipework changes are needed
Access is restricted
The old system needs removal or disposal
The location does not suit the tank size, weight or service access
A smaller or larger system may better suit the household’s usage pattern
Key Features
250L electric storage hot water system
Vulcan Duomax range
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 listed by Vulcan
80 kg shipped weight listed by Vulcan
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, anode maintenance 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. If your old hot water system regularly ran out of hot water, do not automatically replace it with the same size without checking usage and recovery needs.
Single 3.6 kW Element
This Vulcan Duomax 250L model is the 3.6 kW single element version.
A 3.6 kW element may suit many replacement installations where the existing electrical setup is compatible. Electrical suitability should still be checked before ordering or installation.
Electrical work, circuit changes, isolator upgrades and compliance upgrades are not included in the supply-only product price.
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.
A 250L off-peak electric storage system may be useful where the home needs a reliable amount of stored hot water ready across the day.
Indoor or Outdoor Installation Suitability
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 locations, safe tray, drainage, service access and leak protection requirements should be checked before installation.
For outdoor locations, the system location must be suitable for weather exposure, base support, plumbing connections, electrical compliance and future service access.
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 systems where existing valves may be worn, missing or non-compliant.
Lead Free Model Listing
The trade 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.
Delivery and Access Considerations
The Vulcan Duomax 250L is a medium-to-large electric storage hot water system.
Vulcan lists the empty weight as 74 kg and shipped weight as 80 kg. The trade listing shows an approximate empty weight of 75 kg.
Before ordering, check whether the delivery location can safely accept the unit. Stairs, steep blocks, narrow access, tight cupboards, apartment buildings, raised platforms and difficult delivery paths can affect delivery and installation planning.
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, recovery needs 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
The Vulcan Duomax 250L electric storage system uses an electric element to heat stored water.
A heat pump hot water system uses heat from the surrounding air to heat stored 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 location has suitable airflow, drainage, electrical supply, space and noise considerations.
The better option depends on the property, budget, available space, household hot water use, tariff setup and installer advice.
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 point-of-use applications, but they often require specific electrical capacity and may not suit larger family homes.
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
Suitability depends on household size, hot water usage, tariff setup, installation location, plumbing condition, electrical supply, water pressure, access, drainage and compliance requirements.
Valves, Fittings and Parts to Check Before Ordering
An electric storage hot water system may require more than the main tank. Depending on your existing setup and installer requirements, compatible valves, pipework, fittings or accessories may also be needed.
Check whether your installer requires:
Tempering valve
PTR valve
Expansion control valve
Pressure limiting valve
Isolation valve
Non-return valve
Duo valve
Hot water connection kit
Copper or braided connections where suitable
Pipework fittings
Drainage parts
Safe tray for indoor installation
Base or support requirements
Electrical connection parts
Anode option suitable for local water conditions
Hot Water Outlet also sells hot water valves, connections, spare parts and accessories, making it easier to order the system and related products in one place.
Why Buy From Hot Water Outlet?
Hot Water Outlet is focused on hot water supply across Australia. We sell hot water systems, valves, pipework, fittings, connections, spare parts and accessories online, with fast delivery options available on eligible products.
Buy from Hot Water Outlet for:
Supply-only hot water systems
Fast delivery across Australia
Same day delivery in select metro areas on eligible orders
Electric, gas, heat pump and instant hot water products
Hot water valves, pipework and fittings
Spare parts and accessories
Clear product information
Online ordering for homeowners, trades, landlords and property managers
Hot water products from trusted brands like Vulcan
Hot Water Outlet does not install hot water systems directly. If you need help with installation, we may be able to help organise a quote from a reputable installer where available, or you can arrange your own licensed plumber and electrician.
Frequently Asked Questions
Can I buy the Vulcan Duomax 250L supply only?
Yes. Hot Water Outlet sells the Vulcan Duomax 250L as a supply-only electric hot water system. The product price is for the unit only and does not include installation, valve kits, old system removal, disposal, electrical work, pipework changes or compliance upgrades unless clearly stated.
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, outlet flow rates, water temperature, climate, 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. Indoor installations may require safe tray and drainage provisions.
Can it be installed outdoors?
Yes, it can be installed outdoors where the location is suitable and compliant. The base, weather exposure, service access, pipework and electrical requirements should be checked before installation.
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 trade listing identifies this model as lead free.
What is the manufacturer part number?
The manufacturer part number is 6D1250G7.
What is the Vulcan product code?
For the 3.6 kW model, use Vulcan product reference 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 suit like-for-like replacement of an older 250L electric storage water heater, provided the location, dimensions, connections, electrical supply, water pressure and compliance requirements are suitable.
Do I need new valves?
New valves may be required depending on the existing installation, valve age, pressure requirements and compliance needs. Ask your licensed installer to confirm whether you need a tempering valve, PTR valve, expansion control valve, pressure limiting valve or other hot water fittings.
Do I need a plumber and electrician?
Yes. A licensed plumber is required for hot water plumbing work, and a licensed electrician may be required to confirm or complete electrical work for the system.
Does Hot Water Outlet install this system?
Hot Water Outlet sells supply-only hot water systems and parts. We do not install hot water systems directly. If needed, we may be able to help organise a quote from a reputable installer where available.
Is same day delivery available?
Same day delivery may be available in select metro areas on eligible orders. Availability depends on stock, order time, product size and delivery location.
Do you deliver Australia wide?
Yes. Hot Water Outlet supplies hot water systems, valves, fittings, spares and accessories across Australia, with delivery options depending on stock, product size and location.
What warranty applies to the Vulcan Duomax 250L?
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 terms can depend on model, installation and manufacturer conditions.
Order the Vulcan Duomax 250L Online
Order the Vulcan Duomax 250L Electric Storage Hot Water System online from Hot Water Outlet. With 250L hot water delivery, a 3.6 kW single element, vitreous enamel lined cylinder and fast delivery options across Australia, it is a practical supply-only choice for customers replacing an electric storage hot water system.
