Vulcan Duomax 125L Electric Storage Hot Water System
Buy the Vulcan Duomax 125L 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 125L is a compact electric storage hot water system designed for smaller households, units, townhouses, granny flats, rental properties and replacement installations where a larger 160L, 250L, 315L or 400L system is not required. With 125L 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 many existing small electric hot water systems.
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 125L Electric Water Heater
The Vulcan Duomax 125L is an electric storage hot water system that heats and stores water inside a vitreous enamel lined cylinder.
It is designed for smaller households and warmer climates where daily hot water demand is light to moderate. The 125L size may suit homes that need more capacity than a 50L or 80L unit, but do not need the extra stored volume of a 160L or 250L electric storage system.
This 3.6 kW single element model is commonly selected where a 125L electric storage unit is being replaced and the property has suitable plumbing, electrical supply, water pressure, drainage, access and installation space.
Buy Vulcan Duomax 125L Supply Only
Hot Water Outlet sells the Vulcan Duomax 125L 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, tariff requirement, electrical setup, 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 125L is smaller than larger family-sized electric storage units, but delivery access should still be checked before ordering. Consider driveway access, stairs, narrow side paths, unit complexes, cupboards, raised platforms, tight laundries, loading zones and whether someone will be available to receive the delivery.
Is the Vulcan Duomax 125L Right for Your Home?
The Vulcan Duomax 125L may suit customers who need a compact electric storage hot water system with more stored capacity than a very small unit, but less volume than larger household tanks.
It may be suitable if:
You want a 125L electric storage hot water system
You are replacing an existing 125L electric water heater
Your household has light to moderate daily hot water use
You want more stored capacity than a 50L or 80L electric system
You do not need the extra stored volume of a 160L, 250L, 315L or 400L system
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 continuous tariff 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
The property is set up for a different tariff arrangement
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 larger system may better suit the household’s usage pattern
Key Features
125L electric storage hot water system
Vulcan Duomax range
Manufacturer part number: 6D1125G7
Vulcan product reference: 601125G7 for the 3.6 kW model
Tradelink product code: 309841
3.6 kW single element
Lead free model listing
125L hot water delivery
Designed for smaller households and warmer climates
Vulcan lists maximum 4 people based on stated usage conditions
Tradelink describes the unit as suitable for up to 3 people
Vitreous enamel lined cylinder
Suitable for internal and external installation where compliant
Requires connection to continuous 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
41 kg empty weight listed by Vulcan
44 kg shipped weight listed by Vulcan
1250 mm high x 480 mm wide x 515 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 125L Electric Water Heater
Product Code: 601125G7
Manufacturer Part Number: 6D1125G7
Tradelink Product Code: 309841
System Type: Electric storage hot water
Fuel Type: Electric
Tank Volume / Hot Water Delivery: 125L
Recommended Household Size: Smaller households, depending on usage
Installation Type: Internal or external where suitable
Element Type: Single element
Element Rating: 3.6 kW
Tariff Requirement: Requires connection to continuous 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: 1250 mm high x 480 mm wide x 515 mm deep
Tank Diameter / Width: 480 mm
Weight Empty: 41 kg
Weight Shipped: 44 kg
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 125L 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.
125L Storage Capacity
The 125L capacity makes this Vulcan Duomax model suitable for smaller households with light to moderate hot water use.
It may suit units, townhouses, granny flats, smaller homes, rental properties and lower-demand households where a 160L, 250L or 315L system is not required.
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 125L 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.
Continuous Tariff Requirement
The Vulcan 125L electric water heater is listed as requiring connection to continuous tariff.
This is important because smaller electric storage systems may need more regular reheating availability than larger off-peak storage systems. Tariff setup should be checked before ordering, especially if replacing an older hot water unit connected to a different electrical supply arrangement.
If you are specifically looking for an off-peak electric storage system, a larger model may be more suitable depending on household usage and electrical setup.
Indoor or Outdoor Installation Suitability
The Vulcan Duomax 125L 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 125L as having dual handed connection fittings.
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 125L 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 125L 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 125L is smaller than larger 160L, 250L, 315L and 400L electric storage systems, but it still requires suitable access for delivery, positioning and installation.
Before ordering, check whether the delivery location can safely accept the unit. Stairs, tight side access, cupboards, raised platforms, apartment buildings, laundry spaces and difficult delivery paths can affect delivery and installation planning.
Vulcan Duomax 125L vs 160L Electric Storage
The Vulcan Duomax 125L is smaller than a 160L electric storage unit and may suit homes with lighter daily hot water demand.
A 160L model may be better for higher usage, longer showers, extra occupants or homes that regularly run out of hot water with a 125L tank.
The right size depends on usage patterns, tariff setup, recovery needs and whether the household needs more stored capacity.
Vulcan Duomax 125L vs 250L Electric Storage
The Vulcan Duomax 125L is a smaller electric storage system, while a 250L model provides significantly more stored hot water capacity.
A 125L model may suit smaller households, units, granny flats and lower usage. A 250L model may be better for families, higher occupancy, longer showers, higher laundry use or homes needing stronger whole-home hot water capacity.
Vulcan Duomax 125L vs Heat Pump Hot Water
The Vulcan Duomax 125L 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 125L 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 125L vs Instant Electric Hot Water
The Vulcan Duomax 125L stores a set volume of hot water, while an instant electric system heats water as it flows through the unit.
A 125L storage system may suit small whole-home use better than many instant electric units. Instant electric systems may suit point-of-use applications, but they often require specific electrical capacity and may not suit every whole-home installation.
Common Uses
Electric hot water system replacement
125L electric storage replacement
Smaller households
Units and townhouses
Smaller homes and granny flats
Homes with light to moderate hot water usage
Rental properties
Investment properties
Renovation projects
Properties replacing an existing 125L electric unit
Homes suited to continuous tariff 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 125L supply only?
Yes. Hot Water Outlet sells the Vulcan Duomax 125L 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 125L?
The Vulcan Duomax 125L has 125L hot water delivery.
How many people is the Vulcan Duomax 125L suitable for?
Vulcan lists the 125L model as suitable for a maximum of 4 people based on stated usage conditions, while Tradelink describes the Duomax 125L as suitable for up to 3 people. 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?
The Vulcan 125L model is listed as requiring connection to continuous tariff. If you want an off-peak electric storage system, a larger model may be more suitable depending on household usage and electrical setup.
What are the dimensions?
The listed dimensions are 1250 mm high x 480 mm wide x 515 mm deep.
What does it weigh?
The listed empty weight is 41 kg and the listed shipped weight is 44 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 manufacturer part number is 6D1125G7.
What is the Vulcan product code?
The Vulcan product reference for the 3.6 kW model is 601125G7.
What is the Tradelink product code?
The Tradelink product code is 309841.
Does it have dual handed connections?
Yes. Tradelink describes the Vulcan Duomax 125L as having dual handed connection fittings.
Is it suitable for replacing an old 125L electric water heater?
Yes, it may suit like-for-like replacement of an older 125L 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 125L?
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 125L Online
Order the Vulcan Duomax 125L Electric Storage Hot Water System online from Hot Water Outlet. With 125L 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 a compact electric storage hot water system.
