Rheem 400L Electric Hot Water System

The Rheem 400L Electric Hot Water System is available online from Hot Water Outlet as a supply-only electric storage water heater with metro delivery available in selected areas Australia wide.

Customers can purchase the Rheem 400L as a supply-only hot water system and request assistance arranging installation quotes after purchase through licensed local installers in selected metro regions.

The Rheem 400L electric water heater is a large-capacity Australian-made electric storage hot water system designed for bigger households, large family homes, rentals and high-use properties where strong stored hot water capacity is needed. With 400L hot water delivery, durable Rheem Ultranamel® cylinder coating, a thicker sacrificial anode, dual handed water connections and single or twin element model options, it is a strong choice for replacing an older large electric hot water system.

About the Rheem 400L Electric Water Heater

The Rheem 400L Electric Water Heater is part of Rheem’s 491 / 492 Series electric storage range. It is designed and manufactured in Australia and is commonly used as a like-for-like replacement for larger electric storage hot water systems.

Rheem lists the 400L model as suitable for 8–9 people under stated usage assumptions. Real-world suitability can vary depending on shower length, hot water usage, tariff setup, climate, fixture flow rates and household habits.

The 400L range is available in single element and twin element models. The single element model is commonly used for standard large electric storage replacement, while the twin element model can suit homes needing faster recovery or extra daytime hot water support where the electrical setup allows.

Buy Rheem 400L Supply Only

Order the Rheem 400L Electric Hot Water System online from Hot Water Outlet with metro delivery available in selected areas across Australia.

This option is ideal for customers who already have a licensed plumber or electrician arranged and only need the unit supplied.

The supply-only product price includes the hot water system itself.

Installation, old system removal, disposal, valve kits, electrical work, plumbing alterations, compliance upgrades and additional site requirements are not included unless separately quoted.

Supply-only is ideal for customers searching for:

• Rheem 400L price

• Rheem 400L electric hot water system for sale

• Rheem 491400 electric water heater

• Rheem 492400 twin element electric water heater

• Rheem 400L supply only

• 400L electric hot water system supply only

• Rheem electric water heater 400L

• Australian made electric hot water system

• Large electric storage hot water system

Installation Quotes Available After Purchase

Hot Water Outlet does not directly provide installation services.

After purchasing the Rheem 400L Electric Hot Water System, customers in selected metro areas may request assistance arranging installation quotes through licensed local plumbers and electricians.

Installation quote availability depends on:

• service location

• installer availability

• existing system type

• property access

• plumbing suitability

• electrical requirements

• drainage requirements

• compliance requirements

Additional installation costs may apply for:

• valve upgrades

• electrical upgrades

• drainage changes

• pipework changes

• difficult access

• concrete bases

• old system removal

• disposal

• compliance upgrades

Rheem 400L Delivery Brisbane

Hot Water Outlet offers metro delivery for the Rheem 400L Electric Hot Water System in selected Brisbane areas.

Customers can order online and request assistance arranging installation quotes after purchase where available.

Rheem 400L Delivery Gold Coast

Hot Water Outlet offers metro delivery for the Rheem 400L Electric Hot Water System in selected Gold Coast service areas.

Customers can purchase online and organise installation separately or request help arranging installation quotes after purchase.

Rheem 400L Delivery Sydney

Hot Water Outlet offers metro delivery for the Rheem 400L Electric Hot Water System in selected Sydney metro areas.

Customers can order online with installation quote assistance available after purchase in selected locations.

Rheem 400L Delivery Melbourne

Hot Water Outlet offers metro delivery for the Rheem 400L Electric Hot Water System in selected Melbourne metro areas.

Customers can purchase the system online and request help arranging installation quotes after delivery.

Is the Rheem 400L Right for Your Home?

The Rheem 400L Electric Hot Water System may be suitable if you are replacing a large electric storage hot water system and want a reliable Australian-made unit from one of Australia’s most recognised hot water brands.

It is commonly suited to larger family homes, high-use households, rental properties, investment homes and properties with multiple occupants. It can be a strong replacement option where a 250L or 315L system may be too small for the household’s daily hot water demand.

This system may suit you if:

• you are replacing an existing large electric storage hot water system

• you want a 400L electric hot water unit

• your household has high daily hot water demand

• your household has around 8–9 people under Rheem’s stated usage assumptions

• you want single element or twin element model options

• your property has suitable access and installation space

• your plumbing and electrical setup are suitable for the selected installation option

• you prefer supply-only purchase flexibility

Additional installation work may be required depending on:

• existing plumbing condition

• electrical requirements

• drainage requirements

• access limitations

• compliance upgrades

• valve condition

• installation location requirements

• existing base suitability

Key Features of the Rheem 400L

• 400L electric storage hot water system

• Model 491400 with 492400 twin element model available

• Suitable for 8–9 people under Rheem’s stated usage assumptions

• 400L hot water delivery

• Australian made

• Easy like-for-like replacement design

• Common footprint and fitting locations for easier changeover

• Durable Rheem Ultranamel® cylinder coating

• Thicker sacrificial anode for additional cylinder protection

• Dual handed inlet and outlet fittings

• Suitable for connection to lower-cost tariffs where available

• Single element model available

• Twin element model available for faster heating and extra hot water support

• Indoor or outdoor installation suitability

• Rp 3/4 water connections

• 12-year cylinder warranty under Rheem warranty terms

• 1-year labour warranty on the cylinder under Rheem warranty terms

• 1-year parts and labour warranty on all other domestic components under Rheem warranty terms

Quick Specs

Brand: Rheem
Range: Rheem 491 / 492 Series Electric
Product: Rheem 400L Electric Water Heater
Model: 491400
Twin Element Model: 492400
System Type: Electric Storage Hot Water System
Hot Water Delivery: 400L
Recommended Household Size: 8–9 people under Rheem’s stated usage assumptions
Element Rating: 3.6kW and 4.8kW options
Twin Element Option: Available
Installation Type: Indoor or outdoor installation
Water Connections: Rp 3/4
Relief Valve Pressure: 1000 kPa
Expansion Control Valve Setting: 850 kPa
Max Water Supply Pressure With ECV: 680 kPa
Max Water Supply Pressure Without ECV: 800 kPa
Approximate Diameter: 690mm
Approximate Height: 1840mm
Approximate Packaged Weight: 120kg
Cylinder Warranty: 12 years subject to Rheem warranty terms
Cylinder Labour Warranty: 1 year subject to Rheem warranty terms
Other Domestic Parts and Labour Warranty: 1 year subject to Rheem warranty terms

Twin Element Option Available

The Rheem 400L Electric Water Heater is available with a twin element model for homes that need faster heating or additional daytime hot water support.

A twin element model can be useful where household hot water use is heavier at certain times of day, such as when multiple showers, laundry and general hot water demand happen close together. The correct model depends on the home’s electrical setup, tariff arrangement and installation requirements.

Rheem Ultranamel® Cylinder Protection

The Rheem 400L uses Rheem Ultranamel® cylinder coating. This tough internal coating is designed to help protect the cylinder and support long-term performance when the unit is correctly installed, selected and maintained.

The thicker sacrificial anode provides additional cylinder protection against water-borne contaminants. Water quality, installation compliance, valve setup and servicing conditions can all affect hot water system lifespan and warranty outcomes.

Dual Handed Connections

The Rheem 400L Electric Water Heater includes dual handed inlet and outlet fittings. This can make replacement installation easier because the water connections can better suit different existing plumbing layouts.

Dual handed connections can be especially helpful in like-for-like replacement jobs where matching existing pipework may reduce the need for extra plumbing changes.

Designed for Lower-Cost Tariffs

The Rheem 400L electric storage range is suitable for connection to lower-cost tariffs where available and appropriate.

This can help reduce running costs compared with heating water on a standard continuous electricity tariff. The best tariff option depends on the selected model, electricity plan, household demand, location and installation setup.

Large Capacity Electric Storage Hot Water

The 400L storage size makes this Rheem model one of the larger electric hot water options in the residential range.

This extra capacity can be useful for larger families, shared homes, rental properties, multi-person households and homes where several showers, laundry use and kitchen hot water demand happen within a short period.

A larger tank can provide more stored hot water, but it also needs suitable space, support, access and electrical setup.

Common Uses

The Rheem 400L Electric Hot Water System can be suitable for:

• larger family homes

• busy households

• larger townhouses

• rental properties

• investment properties

• shared homes

• electric storage hot water replacement

• homes needing more capacity than a 315L system

• homes with 8–9 people under Rheem’s stated usage assumptions

• indoor or outdoor electric hot water installations

Frequently Asked Questions

Can I buy the Rheem 400L supply only?

Yes. The Rheem 400L can be purchased online as a supply-only product with metro delivery available in selected areas.

Does Hot Water Outlet install electric hot water systems?

No. Hot Water Outlet does not directly provide installation services. Customers may request assistance arranging installation quotes after purchase in selected metro areas.

Can I get an installation quote after purchasing?

Yes. Customers in selected metro areas may request help arranging installation quotes through licensed local installers after purchasing the system.

Is delivery available Australia wide?

Metro delivery is available in selected service areas across Australia. Delivery availability may vary depending on location and product type.

Do I need a valve kit?

Many hot water replacements require compatible valves to meet installation and compliance requirements. Installation quote suitability depends on the existing setup and local requirements.

How many people is the Rheem 400L suitable for?

Rheem lists the 400L electric water heater as suitable for 8–9 people under stated usage assumptions. Actual suitability can vary depending on shower length, hot water usage, tariff setup, climate and household habits.

Can the Rheem 400L be installed outside?

Yes. The Rheem 400L electric water heater is listed for indoor or outdoor installation provided the installation location is compliant and suitable.

What is the warranty on the Rheem 400L?

Rheem lists the 400L electric water heater with a 12-year cylinder warranty, 1-year labour warranty on the cylinder and 1-year parts and labour warranty on all other domestic components subject to Rheem warranty terms and conditions.

What element size does the Rheem 400L use?

The Rheem 400L range is listed with 3.6kW and 4.8kW element rating options. The correct option depends on the selected variant, electrical setup and site requirements.

Is there a twin element Rheem 400L model?

Yes. Rheem lists a twin element 400L model, 492400. The twin element option can provide faster heating and additional hot water support where the electrical setup and tariff arrangement are suitable.

Is the Rheem 400L good for replacing an old electric hot water system?

Yes. The Rheem 400L is designed for easy like-for-like replacement with common footprint and fitting locations to older model electric water heaters. Suitability still depends on the existing location, plumbing, electrical supply, access and household hot water demand.

Is the Rheem 400L suitable for lower-cost tariffs?

Yes. Rheem lists the 400L model as suitable for connection to lower-cost tariffs where available. The best setup depends on the selected model, electricity plan, household demand and installation conditions.

What is the relief valve pressure?

The Rheem 400L is listed with a 1000 kPa relief valve pressure.

What is the expansion control valve setting?

The Rheem 400L is listed with an 850 kPa expansion control valve setting.

What is the difference between Rheem 491400 and 492400?

The Rheem 491400 is the single element 400L model. The Rheem 492400 is the twin element 400L model. The twin element option can provide faster heating and additional hot water support where the electrical setup and tariff arrangement are suitable.

What is the difference between the Rheem 315L and Rheem 400L electric models?

The Rheem 400L model has a larger hot water delivery capacity than the 315L model, making it better suited to larger households or higher daily hot water demand. The Rheem 315L may suit homes that still need a large electric system but do not require the extra stored capacity of a 400L unit.

* Requested element size may come delivered separately to system for electric systems - All units supplied with factory with 3.6kW

**Where a unit supplied is capable of supplying more than 50°C, a tempering valve must be installed on the property or purchased as part of a valve kit with your order.

Buying a new hot water system or hot water part should be simple. Hot Water Outlet helps you compare hot water systems, valves, thermostats, elements, pipework and fittings in one place, so you can choose the products that suit your home, budget and hot water needs without the back and forth.

Whether you already know exactly what you need or you are still comparing electric, gas, instant gas, gas storage or heat pump hot water options, Hot Water Outlet makes it easier to order with confidence.

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See your hot water system price upfront, then add common valves, fittings or accessories before placing your order. This makes it easier to plan your purchase and compare options before checkout.

Product Details That Actually Help

Key specs, sizing details, tank capacity, flow rate, gas type, energy source, dimensions, warranty information, product features and suitability notes are shown clearly, so you can compare hot water systems properly before you buy.

Valves and Accessories Available

Where relevant, you can add common hot water parts such as tempering valves, pressure relief valves, duo valves, non-return valves, thermostats, elements, pipework and fittings to help complete your order.

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Add your hot water unit and selected parts to cart in one order, instead of searching across multiple suppliers for systems, valves, fittings and accessories.

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Hot Water Outlet is built for customers who want a faster, clearer and more convenient way to buy hot water systems and hot water parts online.

Instead of guessing which product suits your home, searching multiple suppliers, or trying to match accessories separately, you can review the system, compare the specifications and add common hot water parts before checkout.

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Order online with confidence.

It is a simpler way to buy the hot water products and parts that matter most.

Important Note

Product suitability can vary by property, existing services, energy source, gas type, available space, connection points, pressure requirements and local compliance requirements. Always check product specifications carefully and confirm the selected hot water system, valves, fittings and accessories are suitable for your property before ordering.

Standard Delivery: 2–8 business days

Express Delivery: 1–4 business days

90% of products are delivered the next business day where stock, postcode eligibility and freight availability allow.

Delivery timeframes are estimates and may vary by product, stock location, delivery postcode, carrier availability and order timing. Wet weather, storms, flooding or unsafe site access may delay delivery and are additional to any advertised or guaranteed freight timeframes.