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Product Information Quick Specs & Benefits View sizing, power, warranty and key product details
Recommended Household Size 6-7 people
Make Rheem
Model 491315
Volume 315L
Maximum Warranty 12 years
Height 1640 mm
Width 640 mm
Made In Australia
Main Cylinder Material Steel
Installed Today

Rheem 315L Electric Hot Water System

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RHEEM ELECTRIC HOT WATER

Rheem 315L Electric Hot Water System

The Rheem 315L Electric Hot Water System is a large-capacity Australian-made electric storage water heater designed for family homes, rentals, investment properties and higher-use households needing dependable stored hot water.

Installed Today offers the Rheem 315L as a supply-only electric hot water system, with supply and installation options available across eligible Brisbane and Gold Coast service areas.

Key features include 315L hot water delivery, Rheem Ultranamel® cylinder protection, a thicker sacrificial anode, dual-handed inlet and outlet fittings, lower-cost tariff suitability where available and both single-element and twin-element model options.

Rheem 315L at a glance: this is a 315L electric storage hot water system from Rheem's 491 / 492 Series. Rheem lists the 315L model as suitable for up to 9 people under its stated usage assumptions. It is designed for indoor or outdoor installation, is available in single and twin-element versions and carries a 12-year cylinder warranty subject to Rheem warranty terms.
WHAT IT DOES

What Does the Rheem 315L Electric Water Heater Do?

The Rheem 315L stores and electrically heats a large volume of domestic hot water for showers, baths, basins, kitchens, laundry and other household uses.

It is part of Rheem's 491 / 492 Series electric storage range and is designed as a practical replacement option for existing electric storage water heaters where the site, plumbing and electrical supply are suitable.

WHO IT SUITS

Who Is the Rheem 315L Best For?

Larger Families

Rheem lists the 315L model as suitable for up to 9 people based on its stated usage assumptions. Actual suitability depends on shower duration, fixture flow rates, tariff setup, climate and household habits.

Electric Storage Replacement

The Rheem 315L can suit homes replacing an older large electric storage hot water system where the existing position, plumbing and electrical setup are compatible.

Higher Hot Water Demand

The 315L capacity provides more stored hot water than a 250L-class system without stepping up to a larger 400L electric storage unit.

WHO IT HELPS

What Problems Can the Rheem 315L Help Solve?

250L System Too Small

The larger 315L hot water delivery can suit households that regularly need more stored hot water than a 250L system provides.

Older Electric System Replacement

Common footprint and fitting locations are intended to help make selected like-for-like electric storage replacements more straightforward.

Need for Faster Recovery

A twin-element 492315 model is available for applications needing additional hot water recovery where the electrical supply and tariff arrangement are suitable.

PRODUCT AT A GLANCE

Rheem 315L Key Details

315L Hot Water Delivery
Up to 9 People*
491 / 492 Single & Twin Element
12 Years Cylinder Warranty**

*Based on Rheem's stated usage assumptions. **Subject to Rheem warranty terms, conditions and exclusions.

PRODUCT SUITABILITY

Is the Rheem 315L Right for My Home?

A Good Choice If...

You want a large-capacity electric storage water heater, are replacing an existing electric system, need more stored water than a 250L model or want a single or twin-element option.

Consider Another Option If...

Your household needs significantly less storage, your installation space is restricted, or a 400L system is more appropriate for very high daily hot water demand.

Check Before Ordering

Confirm access, available installation space, base condition, plumbing connections, valve requirements, electrical supply and whether the single or twin-element version is appropriate.

SIZE & APPLICATION

What Size Home Does the Rheem 315L Suit?

How Many People Does the Rheem 315L Suit?

Rheem lists the 315L electric water heater as suitable for up to 9 people, based on 7-minute showers at 42°C mixed water temperature in a moderate climate on a time-of-use tariff.

Actual suitability can vary depending on shower length, hot water use, climate, household routines, fixture flow rates and tariff setup.

When Is 315L a Useful Size?

A 315L system can suit households needing more stored hot water than a 250L system but where a larger 400L storage unit may not be necessary.

HOW IT WORKS

How Does the Rheem 315L Work?

1. Cold Water Enters

Cold water enters the storage cylinder through the plumbing connections and is held ready for heating.

2. Electric Element Heats

An electric heating element raises the stored water temperature. Rheem lists 3.6 kW and 4.8 kW element options within the range.

3. Hot Water Is Stored

The heated water remains stored inside the insulated cylinder until required at household fixtures.

KEY FEATURES

Key Features of the Rheem 315L

315L Hot Water Delivery

The large storage capacity is designed for family homes and households with higher daily hot water requirements.

Rheem Ultranamel®

The cylinder uses Rheem Ultranamel® coating to help protect the internal cylinder surface and support long-term performance.

Thicker Sacrificial Anode

A thicker sacrificial anode provides additional cylinder protection against water-borne contaminants as part of the system's cylinder-protection design.

Dual-Handed Connections

Dual-handed inlet and outlet fittings provide additional plumbing flexibility when replacing existing electric storage systems.

Lower-Cost Tariff Suitable

The 315L range is suitable for connection to lower-cost electricity tariffs where available and appropriate.

Twin-Element Option

The 492315 twin-element model can provide additional heating recovery and hot water support where the electrical installation allows.

TECHNICAL DETAILS

Rheem 315L Specifications

Specification Details
Brand Rheem
Range Rheem 491 / 492 Series Electric
Single-Element Model 491315
Twin-Element Model 492315
System Type Electric storage hot water system
Hot Water Delivery 315L
Household Guide Up to 9 people under Rheem's stated usage assumptions
Element Options 3.6 kW and 4.8 kW
Twin-Element Option Available
Installation Indoor or outdoor where suitable
Water Connections Rp 3/4
Relief Valve Pressure 1000 kPa
Expansion Control Valve Setting 850 kPa
Maximum Water Supply Pressure With ECV 680 kPa
Maximum Water Supply Pressure Without ECV 800 kPa
Approximate Diameter 640 mm
Approximate Height 1640 mm
Approximate Packaged Weight 97 kg
Cylinder Protection Rheem Ultranamel® cylinder coating with sacrificial anode
Manufacture Australian made
Cylinder Warranty 12 years, subject to Rheem warranty terms
Cylinder Labour Warranty 1 year, subject to Rheem warranty terms
Other Domestic Parts & Labour Warranty 1 year, subject to Rheem warranty terms
SINGLE OR TWIN ELEMENT

Rheem 491315 vs Rheem 492315

The Rheem 491315 is the single-element 315L model, while the Rheem 492315 is the twin-element 315L model.

The twin-element version can provide additional heating recovery and extra hot water support where the household demand, electrical supply and tariff arrangement are suitable.

The correct version should be selected before ordering because the electrical requirements and installation scope can differ.

CYLINDER PROTECTION

Rheem Ultranamel® Cylinder Protection

The Rheem 315L uses Rheem Ultranamel® cylinder coating, a protective internal coating designed to help protect the cylinder and support long-term performance.

The system also uses a thicker sacrificial anode to provide additional cylinder protection against water-borne contaminants.

Water quality, correct installation, valve setup, maintenance and operating conditions can all affect the long-term performance of an electric storage water heater.

LOWER-COST TARIFFS

Can the Rheem 315L Run on a Lower-Cost Electricity Tariff?

Yes. Rheem lists the 315L electric storage range as suitable for connection to lower-cost tariffs where available and appropriate.

The best tariff arrangement depends on the selected model, household hot water demand, electricity provider and electrical installation.

INSTALLATION REQUIREMENTS

What Is Required to Install the Rheem 315L?

Installation requirements depend on whether the unit is replacing an existing electric storage system or being installed in a new or relocated position.

  • Suitable compliant installation position
  • Level and structurally adequate base
  • Access for a unit approximately 1640 mm high and 640 mm diameter
  • Compatible hot and cold water connections
  • Correct valve arrangement
  • Suitable incoming water pressure
  • Compliant pressure-relief discharge
  • Suitable electrical supply for the selected element configuration
  • Appropriate tariff connection where a lower-cost tariff is required
  • Suitable indoor or outdoor installation location
  • Adequate service access
  • Any required tray, drainage, base or insulation provisions
WATER PRESSURE

Rheem 315L Water Pressure Requirements

The supplied specifications list a 1000 kPa relief valve pressure and an 850 kPa expansion control valve setting.

The listed maximum water supply pressure is 680 kPa when an ECV is fitted and 800 kPa without an ECV.

Incoming water pressure and the condition of the existing valve arrangement should be checked when planning installation. Replacement or additional valves may be required depending on the property.

REPLACEMENT & UPGRADES

Can the Rheem 315L Replace My Existing Hot Water System?

The Rheem 315L is designed with common footprint and fitting locations intended to help with selected like-for-like replacements of older electric storage water heaters.

Replacement suitability still depends on the actual installation position, base, plumbing, valves, electrical supply, access and household hot water demand.

Replacing a 250L System

The Rheem 315L provides more stored hot water than a 250L system and may suit households that have outgrown a smaller storage cylinder.

Relocating the System

Moving the new water heater away from the existing position can require additional pipework, drainage, electrical work, base preparation and labour.

WHAT'S INCLUDED

What's Included With the Rheem 315L?

Supply Only

Choose supply only if you already have appropriately licensed trades arranged. The product price covers the Rheem 315L unit and applicable manufacturer-supplied components.

Supplied & Installed

Where available, choose an Installed Today supply and installation package covering the unit plus the selected standard installation scope.

Possible Additional Work

Valve kits, old-system removal, disposal, electrical alterations, pipework changes, relocation, drainage, base work, restricted access and compliance upgrades may require additional charges.

SUPPLY OR INSTALL

Choose How You Want to Order the Rheem 315L

Supply Only

Choose supply only when you already have appropriately licensed trades arranged and simply need the Rheem 315L supplied.

Brisbane Installation

Supplied and installed options are available across eligible Brisbane service areas, subject to access, site conditions and installation availability.

Gold Coast Installation

Supplied and installed options are available across eligible Gold Coast service areas, subject to site suitability and installation availability.

SUPPLY OPTIONS

Buy the Rheem 315L From Installed Today

Installed Today offers supply-only ordering for customers who already have licensed trades arranged. Delivery availability and freight requirements depend on the destination and order.

Eligible Brisbane and Gold Coast customers can also select supply and installation options where available.

Brisbane Gold Coast Supply Only Supply & Install
BRISBANE INSTALLATION

Rheem 315L Supply & Installation Brisbane

Brisbane customers can order the Rheem 315L with an eligible supply and installation package. The large-capacity system may suit family homes, larger households, rentals and investment properties replacing an existing electric storage water heater.

Before installation, the property should be checked for access, base condition, plumbing connections, valve requirements and electrical suitability for the selected single or twin-element configuration.

GOLD COAST INSTALLATION

Rheem 315L Supply & Installation Gold Coast

Eligible Gold Coast customers can select the Rheem 315L as a supplied and installed electric hot water package.

This may suit homeowners, landlords, renovators and property managers wanting the product and installation organised together. Final installation scope depends on the existing plumbing, electrical setup, access, valves and whether additional removal or upgrade work is required.

COMPARE YOUR OPTIONS

Rheem 315L vs 250L and 400L Electric Storage

Feature 250L 315L 400L
Relative Capacity Smaller 315L Larger
Typical Application Moderate family demand Larger families and higher demand Very high stored hot water demand
Main Reason to Consider Smaller storage footprint Balance of large capacity and residential replacement practicality Maximum stored capacity for high-demand homes

Rheem 250L vs 315L

The 315L system provides more stored hot water and may suit larger households or homes that regularly run short with a 250L system.

Rheem 315L vs 400L

A 400L system provides greater storage for very high-demand households. The 315L can suit customers who need substantial capacity without moving to the largest residential electric storage size.

COMMON QUESTIONS

Questions About the Rheem 315L

Can I buy the Rheem 315L supply only?

Yes. The Rheem 315L can be purchased as a supply-only product if you already have appropriately licensed trades arranged.

Can Installed Today install the Rheem 315L?

Supply and installation options are available across eligible Brisbane and Gold Coast service areas, subject to site suitability and installation availability.

Is installation included in the product price?

No. The main product price is for the unit unless an installed option is selected. Installation, valves, electrical work, old-system removal, disposal and other site-specific requirements are separate unless expressly included.

What does the installed-from price include?

The installed-from price is based on the Rheem 315L unit plus the matching standard installation option. Final pricing can vary depending on valves, removal or disposal, plumbing, electrical work, access and compliance requirements.

Do I need a valve kit?

Many electric hot water replacements require compatible valves to meet installation and compliance requirements. The existing installation should be checked before ordering.

What is the standard model number?

The standard Rheem 315L model is 491315.

What is the twin-element model number?

The twin-element Rheem 315L model is 492315.

How much hot water does the Rheem 315L deliver?

The Rheem 315L has a listed hot water delivery of 315 litres.

How many people does the Rheem 315L suit?

Rheem lists the 315L electric water heater as suitable for up to 9 people based on 7-minute showers at 42°C mixed water temperature in a moderate climate on a time-of-use tariff.

Can the Rheem 315L be installed outside?

Yes. The supplied product information lists the Rheem 315L for indoor or outdoor installation where the installation location is compliant and suitable.

What element ratings are available?

The supplied specifications list 3.6 kW and 4.8 kW element options.

Is a twin-element model available?

Yes. The Rheem 492315 twin-element model is available for applications where additional heating recovery is required and the electrical installation supports it.

What are the approximate dimensions?

The supplied specifications list an approximate height of 1640 mm and diameter of 640 mm.

What is the approximate packaged weight?

The listed packaged weight is approximately 97 kg.

What is the relief valve pressure?

The listed relief valve pressure is 1000 kPa.

What is the expansion control valve setting?

The listed expansion control valve setting is 850 kPa.

What is the maximum water supply pressure?

The supplied specifications list a maximum water supply pressure of 680 kPa with an ECV and 800 kPa without an ECV.

Is the Rheem 315L suitable for lower-cost tariffs?

Yes. Rheem lists the 315L range as suitable for connection to lower-cost electricity tariffs where available and appropriate.

Is the Rheem 315L Australian made?

Yes. The supplied product information identifies the Rheem 315L electric storage water heater as Australian made.

Does the Rheem 315L have dual-handed connections?

Yes. The Rheem 315L includes dual-handed inlet and outlet fittings to provide additional plumbing flexibility.

Can it replace an old 315L electric water heater?

It may be suitable where the existing installation position, plumbing, electrical setup and access are compatible. Rheem describes the range as designed for easy replacement using common footprint and fitting locations.

What is the difference between Rheem 491315 and 492315?

The 491315 is the single-element 315L model. The 492315 is the twin-element model, designed to provide additional heating recovery where the electrical installation and tariff arrangement are suitable.

WARRANTY & MAINTENANCE

Rheem 315L Warranty and Maintenance

The supplied product information lists a 12-year cylinder warranty, a 1-year labour warranty on the cylinder and a 1-year parts and labour warranty on all other domestic components, subject to Rheem's warranty terms, conditions and exclusions.

The cylinder uses Rheem Ultranamel® protection together with a sacrificial anode. Ongoing servicing and maintenance should include the water heater, valves, anode, plumbing and electrical components as required by the manufacturer and applicable installation requirements.

WHY INSTALLED TODAY

Why Buy the Rheem 315L From Installed Today?

Installed Today gives customers a straightforward way to purchase the Rheem 315L as a supply-only product or select an eligible supplied-and-installed package in Brisbane or the Gold Coast.

Supply Only For Customers With Their Own Trades
315L Large Electric Storage
Brisbane Eligible Installation Areas
Gold Coast Eligible Installation Areas
FINAL CHECK

Is the Rheem 315L Right for You?

The Rheem 315L Electric Hot Water System is primarily suited to larger households wanting substantial stored hot water capacity, Australian-made electric storage construction and the option of single or twin-element models.

Before ordering, confirm that the property can accommodate the unit's approximate 1640 mm height, 640 mm diameter and 97 kg packaged weight, together with the required plumbing, valves and electrical supply. Choose supply only if your licensed trades are already arranged, or select an eligible Brisbane or Gold Coast supply and installation option where available.

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.

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