Rheem 400L Electric Hot Water System

The Rheem 400L Electric Hot Water System is available from Installed Today as a supply-only electric storage water heater or as a complete supply and install package in selected Brisbane and Gold Coast service areas.

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

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 as a supply-only hot water system. This option is ideal if you already have a licensed plumber or electrician arranged and only need the unit supplied.

The supply-only product price is for 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 selected separately as add-ons.

Supply-only is best 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

Rheem 400L Supplied and Installed in Brisbane & Gold Coast

Installed Today can supply and install the Rheem 400L Electric Hot Water System in selected Brisbane and Gold Coast service areas.

This option is designed for customers who want the hot water system supplied and professionally installed through one streamlined online order. The supply and install pathway helps confirm whether this system suits your property, whether a valve kit is required, whether the existing location is suitable, and whether any additional installation add-ons may be needed before checkout.

The installed-from price is based on the product plus the matching standard installation option. Final pricing may vary depending on access, electrical suitability, valve requirements, old system removal or disposal selections, plumbing changes, compliance requirements and selected add-ons.

Rheem 400L Installation in Brisbane

For Brisbane customers, the Rheem 400L Electric Water Heater can be ordered with supply and install options through Installed Today. This is suitable for homes replacing an existing electric hot water system where the current location, access, plumbing and electrical supply are suitable for the selected installation option.

The 400L size can be a strong fit for larger Brisbane family homes, busy households, larger rentals, investment properties and homes where a 315L system may not provide enough stored hot water capacity.

Customers in selected Brisbane suburbs can complete the installation check before checkout to confirm whether standard installation, valve kit selection, electrical work, extra plumbing add-ons, old system removal or disposal options may be required.

This makes the page suitable for customers searching for Rheem 400L installation Brisbane, Rheem electric hot water supplied and installed Brisbane, and 400L electric hot water replacement Brisbane.

Rheem 400L Installation in Gold Coast

Gold Coast customers can also order the Rheem 400L Electric Hot Water System with supply and install options in selected service areas.

This pathway is useful for homeowners, landlords, property managers and renovators who want the product and installation organised together instead of buying the unit separately and arranging trades afterwards.

Complete the supply and install check to confirm whether the existing setup is suitable and whether additional items such as valve kits, electrical work, pipework, base support, access requirements or old system disposal may be required.

This helps customers searching for Rheem 400L installed Gold Coast, Rheem electric hot water installation Gold Coast, and 400L electric hot water supply and install Gold Coast.

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 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

• Extra pipework or drainage changes are needed

• Electrical upgrades are required

• Access is restricted

• A compliant base, tray, drainage or insulation is required

• The old system needs additional removal or disposal work

• A twin element model requires electrical work to suit the site

• The existing location does not suit the larger tank size or filled weight

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. The installation check helps confirm whether the site is suitable before completing a supply and install order.

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

• 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, shower length, hot water usage, tariff setup, installation location, plumbing condition, electrical supply, access and compliance requirements.

Why Order From Installed Today?

Installed Today gives customers a simple way to order the Rheem 400L Electric Hot Water System as either a product-only purchase or a supply and install package in selected Brisbane and Gold Coast service areas.

You can compare the unit-only price, check the installed-from price, complete the installation compatibility check and select matching installation add-ons before checkout.

Why customers choose Installed Today:

• Supply only or supply and install options

• Installed-from pricing shown separately

• Compatibility check before checkout

• Valve kits and installation add-ons available online

• Brisbane and Gold Coast service area support

• Suitable for electric hot water replacement orders

• Clear product and installation pathway before checkout

• Large 400L electric storage replacement option

• Product-only ordering for customers with their own licensed installer

• Twin element option available for suitable homes

• Australian-made Rheem electric storage hot water system

Frequently Asked Questions

Can I buy the Rheem 400L supply only?

Yes. You can buy the Rheem 400L as a supply-only product if you already have a licensed installer arranged. The unit-only price does not include installation, old system removal, disposal, valve kits, electrical work, plumbing alterations or compliance upgrades unless selected separately.

Can I get the Rheem 400L installed in Brisbane?

Yes. Supply and install options are available in selected Brisbane service areas. Complete the installation check to confirm whether the standard installation option suits your property and whether additional add-ons may be required.

Can I get the Rheem 400L installed in Gold Coast?

Yes. Selected Gold Coast service areas are available. Installation suitability depends on access, existing plumbing, electrical requirements, drainage, valve condition, compliance and selected add-ons.

Is installation included in the product price?

No. The main product price is the unit-only price. The installed-from price is shown separately so you can compare supply only against supply and install.

What does the installed-from price include?

The installed-from price is based on the Rheem 400L unit plus the matching standard installation option. Final pricing may vary depending on valve kits, removal or disposal selections, pipework, electrical work, access, compliance and other selected add-ons.

Do I need a valve kit?

Many hot water replacements require compatible valves to meet installation and compliance requirements. The installation check helps identify whether a valve kit is recommended for your order.

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.

Hassle-Free Installation – Done Right by Trusted Experts

Need professional installation? We’ve got you covered! Our optional installation service connects you with our network of certified, trusted contractors, ensuring a smooth and stress-free setup.

How It Works:

🔹 Step 1: Select Installation Service
Choose to include professional installation when purchasing your new system.

🔹 Step 2: Pay for Installation Upfront
Simply add the installation service prior to adding your product to cart —no hidden fees, no surprises.

🔹 Step 3: We Assign a Certified Contractor
We’ll match you with a licensed, experienced contractor from our network to handle the installation.

🔹 Step 4: Schedule Your Installation
The assigned contractor will contact you directly to arrange a convenient time for installation.

🔹 Step 5: Direct Support When You Need It
For any installation-related questions, your contractor is your first point of contact. If any issues arise, our team is here to help.

🚨 Please Note: Installed Today supplies the product and connects you with a certified contractor for installation.

We’re committed to delivering top-quality products and facilitating a seamless installation experience. Have product questions? Reach out to us anytime! 🔥

Buying a new hot water system, water filter, pump or plumbing product should be simple. Installed Today helps you compare the product, the supply-only price and the available installation options in one place, so you can choose what suits your home, budget and timing without the back and forth.

Whether you already know exactly what you need or you are still comparing options, we make it easier to order with confidence.

Why Customers Choose Installed Today

Supply Only or Installed Options

Choose the product on its own, or add installation where available. This gives you the flexibility to buy the way that suits you best.

Clear Pricing Before Checkout

See your product price upfront, then add the installation options or common extras you need before placing your order. No confusing quote forms just to understand your starting price.

Product Details That Actually Help

Key specs, sizing details, warranty information, product features and suitability notes are shown clearly, so you can compare products properly before you buy.

Installation Add-Ons Available

Where relevant, you can add common installation extras such as valve kits, bases, electrical options, removal, access-related items or other site-specific upgrades before checkout.

Built Around Brisbane and Gold Coast Homes

Our product and installation options are selected with common local homes, water quality, plumbing layouts, access issues and replacement requirements in mind.

One Simple Order

Add the product and selected extras to cart in one order, instead of trying to organise separate suppliers, installers and parts.

Practical Help Before You Buy

Not sure which product, size or installation option is right? Installed Today gives you a clearer path to choosing the right system 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 are needed, you can review the product, compare your options and move forward with confidence.

Choose supply only if you just need the product.

Choose supplied and installed if you want the product installed where available.

Add common extras before checkout if your job needs additional parts or site-specific options.

It is a simpler way to organise the product and the parts of the job that matter most.

Important Note

Installation availability, inclusions and add-ons vary by product type, site access, existing services, selected options and your property requirements. Some installations may require additional work, upgrades or checks before the job can proceed.

Fast & Reliable Delivery – What to Expect

Same Day Delivery: Available in Brisbane and Gold Coast on select units ordered before 8:00am
Express Delivery: 1–4 business days
Standard Delivery: 2–8 business days

Same Day Delivery

Same day delivery is available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 8:00am, subject to stock availability, delivery capacity and suitable transport conditions.

Fast Metro Delivery

Most hot water orders in metro areas are delivered quickly, with around 90% arriving within 1 business day.

Weather Delays

Hot water systems cannot always be transported safely by courier during rain. Delivery timeframes may be affected when wet weather impacts safe handling, loading, unloading or transport conditions.

Express Delivery Guarantee

If your express delivery order takes longer than 1–4 business days, we will adjust the delivery timeframe to our standard 2–8 business days and refund your express shipping charge automatically.

Order Tracking

We will send your delivery details as soon as your order has been dispatched.

Need help with your delivery? Contact our team and we’ll be happy to assist.