🏷️ Brand – Rheem
🔢 Model Number – 551325
💧 Volume (L) – 325
👨‍👩‍👧‍👦 Recommended Maximum Number of Occupants – 5
💰 Estimated Annual Savings* – $1177
📊 Coefficient of Performance (COP) – 4.5
🔌 Electrical Connection Type – Hardwired 15amp
📏 Width – 619mm
📏 Height – 1631mm
⚖️ Weight – 130kg
🌍 Manufactured In – Australia
🔩 Cylinder/Heat Exchange Material – Steel Enamel
🛡️ Cylinder/Heat-Exchange Warranty – 5 Years
🔇 Noise Level – 47 dBa
🛏️ Avoid Install Next to Sleeping Areas – Yes (Recommend Unit Relocated To Communal Areas or Switched off at Night)
⚡ Energy Source – Solar
📡 WiFi Controller Built In or Compatible – No
⏲️ Built-In Timer – No
💡 LED/LCD Status Indicator – Yes

Rheem MPi-325 Series II Heat Pump Installation in Brisbane & Gold Coast

If you are looking for Rheem MPi-325 Series II Heat Pump installation in Brisbane or the Gold Coast, JR Gas & Water provides practical advice, supply and installation, and professional replacement services for homes that suit this style of system. The Rheem MPi-325 Series II Heat Pump is a heat pump hot water system designed to use ambient air to heat stored water efficiently, making it a strong option for homeowners who want a modern electric alternative to a standard storage tank. For the right home, it can be a smart solution for hot water replacement, a like-for-like upgrade, or a new supply and installation where location, airflow, drainage, and electrical setup have been properly considered.

What Is the Rheem MPi-325 Series II Heat Pump?

The Rheem MPi-325 Series II Heat Pump is a 325 litre heat pump hot water system that heats water by drawing energy from the surrounding air rather than relying only on direct electric resistance heating. It stores the heated water in an integrated tank, which means it combines the efficiency benefits of a heat pump with the familiar operation of a storage hot water system.

This model is designed for homes that want a more energy-efficient way to produce domestic hot water while still having strong stored capacity ready for everyday use. It is commonly recommended as a replacement for small to medium electric water heaters and is designed to suit a wide range of Australian climate zones. For households wanting a larger-capacity heat pump with a practical family-sized tank, the MPi-325 Series II is a strong option.

Why Choose the Rheem MPi-325 Series II Heat Pump?

One of the main reasons people choose the Rheem MPi-325 Series II Heat Pump is because it offers the efficiency benefits of heat pump technology in a larger residential format. For the right home, that can mean much lower running costs than a conventional electric storage system, along with a cleaner and more modern hot water setup.

This model also stands out because it is designed for 2 to 5 people, making it well suited to family households that want a substantial hot water buffer. It is built to operate in a broad range of conditions and is designed to work as a practical all-round heat pump rather than a niche product for only one type of home. For buyers wanting a recognised Rheem heat pump that sits outside the current Ambiheat and AmbiPower naming, the MPi-325 Series II still carries strong practical appeal.

The Rheem MPi-325 Series II Heat Pump will also appeal to buyers who want a recognised Australian market brand with stronger confidence in support, product backing, and long-term ownership than a cheaper unknown alternative.

Is the Rheem MPi-325 Series II Heat Pump Right for Your Home?

The Rheem MPi-325 Series II Heat Pump can be a very good fit for homes that want an efficient heat pump hot water system and have a suitable installation location with enough airflow and clearance. A 325 litre heat pump is generally well suited to family households, homes with moderate to stronger daily hot water demand, or properties that want a bigger storage buffer than a 180 litre or 270 litre model.

It may suit homeowners replacing an older electric storage system, upgrading from a less efficient unit, or choosing a modern heat pump for a new installation. It can also appeal to homes that want a larger-capacity system while still taking advantage of the lower running costs heat pumps can offer compared with a standard electric tank.

It is not the right answer for every property though. Heat pump systems depend more heavily on location, airflow, drainage, clearance, and ambient conditions than a standard electric storage tank. The available space, installation position, surrounding noise considerations, and practical plumbing layout all matter. JR Gas & Water considers the intended location, the existing system, plumbing layout, electrical supply, and how the home actually uses hot water before recommending the installation path.

Why Choose a Quality Hot Water System Instead of a Cheaper Alternative?

A hot water system is not just about the appliance price on the day of purchase. It is also about how efficiently it runs, how reliably it performs, how well it is supported, and how long it continues to suit the household. A recognised model like the Rheem MPi-325 Series II Heat Pump gives homeowners more confidence in build quality, efficiency, parts support, and long-term ownership than many cheaper alternatives.

That matters even more with heat pumps, because they are more installation-sensitive than a standard electric tank. A quality unit from a recognised brand is more likely to deliver the performance, recovery, and long-term support that homeowners expect when they invest in a more advanced hot water system. Better design, stronger brand backing, and a more established support network can make a real difference over time.

For many homeowners, choosing a better heat pump up front is really about reducing the risk of disappointment later. When a system is being installed into your home, long-term efficiency, reliability, and product support are usually worth more than the smallest upfront saving.

Professional Rheem MPi-325 Series II Heat Pump Installation in Brisbane & Gold Coast

JR Gas & Water provides professional Rheem MPi-325 Series II Heat Pump installation in Brisbane & Gold Coast for customers who want the system installed properly to suit their property, services, and household needs. We take an installation-led approach because heat pump hot water systems need more than a simple swap-over to perform properly. The final result depends on choosing the right location, making sure the airflow and clearances are suitable, and ensuring the plumbing and electrical setup match the system.

For heat pump installations, the job is not just about placing the unit where the old tank was. It also needs to suit access, base support, surrounding space, condensate handling, pipework arrangement, and the practical day-to-day use of the property. That is why hot water installation in Brisbane or hot water installation on the Gold Coast should be assessed as a proper installation project, not just treated as a simple product delivery.

JR Gas & Water services Brisbane and the Gold Coast, along with surrounding areas including Logan, Ipswich, Moreton Bay and Redlands. Whether you need a straight hot water replacement in Brisbane or a new heat pump hot water system installed by licensed professionals, we help make sure the system and installation path are right for the home.

What’s Involved in Installing the Rheem MPi-325 Series II Heat Pump?

A standard Rheem MPi-325 Series II Heat Pump installation will usually involve supplying the genuine unit, removing the old system where applicable, positioning the new heat pump in a suitable location, connecting it to existing plumbing and electrical services where those services are suitable, testing the system, commissioning it, and providing basic operating guidance.

As with most hot water replacements, final installation scope depends on what is already at the property. Some jobs are straightforward replacements, while others may require extra works to suit the new system properly. Depending on the site, that may include valve upgrades, tempering valve work, drainage provisions, base considerations, pressure limiting valve requirements, relocation pipework, condensate handling, or electrical adjustments.

Because this is a heat pump hot water system, available airflow, clearance, installation position, and electrical suitability are all important. JR Gas & Water keeps the process practical and clear so customers understand what is standard, what may vary, and what may be needed for a safe and compliant installation.

Why Choose JR Gas & Water?

JR Gas & Water is not just supplying a product. We help customers choose the right hot water setup for their home and make sure the installation suits the property, existing system, plumbing layout, power supply, and intended use. That matters with a model like the Rheem MPi-325 Series II Heat Pump, because the best result depends on both the heat pump and the installation being right for the home.

Customers choose JR Gas & Water because we understand real hot water replacement work in real homes, not just brochure features. We look at whether the current system is a straightforward replacement, whether the proposed location is suitable, whether extra drainage or plumbing work is needed, and whether the setup makes sense for the household’s usage. For homeowners looking for reliable installers in Brisbane or the Gold Coast, that more practical approach helps reduce guesswork and leads to a better installation outcome.

Rheem MPi-325 Series II Heat Pump Installation FAQs

How much does Rheem MPi-325 Series II Heat Pump installation cost in Brisbane or the Gold Coast?
The final cost depends on whether it is a straightforward replacement or whether extra plumbing, drainage, base, valve, or electrical works are required. A simple like-for-like installation is usually more straightforward than a job needing location or service changes.

Is the Rheem MPi-325 Series II Heat Pump right for my home?
It can be a strong option if you want an efficient heat pump hot water system and your property has a suitable installation location with the right airflow, clearance, and services. Household size and hot water usage should be considered before choosing the 325 litre model.

What is included in a standard Rheem MPi-325 Series II Heat Pump installation?
A standard installation usually includes supply of the unit, removal of the old system where applicable, installation to suitable existing services, testing, commissioning, and basic handover. Any additional works needed at the property can be quoted separately.

Can the Rheem MPi-325 Series II Heat Pump replace my current system?
In many cases, yes, particularly where it is replacing an older electric storage system. Suitability depends on the available location, airflow, plumbing arrangement, drainage, and whether the property is suited to a heat pump installation.

Can JR Gas & Water install the Rheem MPi-325 Series II Heat Pump in my area?
JR Gas & Water installs hot water systems across Brisbane, the Gold Coast, and surrounding service areas. If you want, send the next model and I’ll keep them in the same format.

Heat Pump Hot Water System Package Selection Guide

(Please rotate mobile device to landscape for easy viewing)

Choosing the right heat pump hot water system package depends on your installation requirements, household size, and whether additional electrical or plumbing work is needed. Use this guide to compare package levels and find the best fit for your home.

Selecting the right package helps streamline installation, but we understand that needs may change, and that the purchaser isn’t a plumber. We’re flexible and can make adjustments, such as upgrading to the next package as needed.

💡 Which Package is Right for You?

IMPORTANT - All online packages are for external installations only, for internal installations please complete our quote request form.

✅ Base – For compliant replacements
Ideal for identical direct swaps where the existing system meets compliance. No extra plumbing, electrical work or disposal required or included.

(EXAMPLE - A Rheem 250L 491250 replacing complaint Rheem 250L 491250 not a Rheem 250L 101250)

✅ Silver – For minor upgrades
Includes pipework alterations and a valve kit but does not include electrical modifications or system disposal. Designed for those swapping a heat pump under 10 years old and working to a tight budget. 

(EXAMPLE - Swapping a 10year old Rheem/Rinnai heat pump with a new one where the existing installation is good but requires pipework alterations to adapt the new unit and new valve set for warranty)

🏆 Gold (Best Seller) – For standard installations
Covers old system removal and plumbing modifications, making it the most common choice for standard installations. Excludes electrical circuit modifications.

(EXAMPLE - Swapping a 20year old Dux heat pump with a new Rinnai GR Series. Strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

💰 Sapphire (Best Value) – For installations requiring electrical work
Adds electrical safety features like an isolator, safety switch, and cable extensions to ensure a compliant and safe electrical connection. Perfect for those swapping out an electric hot water system, heat pump with different electrical connection type or split solar system (tank on ground/panels on roof)

(EXAMPLE - Swapping an old electric system with a new iStore that has a different electrical connection type, then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

✅ Diamond – For homes needing extensive electrical work
Provides extra plumbing and electrical modifications, including a new electrical circuit, making it ideal for homes without existing wiring for an electric system. Designed for those swapping from a gas system or where a larger electrical circuit is needed

(EXAMPLE - Swapping an old Gas System with a new Enviroheat that needs its own dedicated electrical circuit, type then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

✅ Platinum – The ultimate package
Includes everything – system relocation, extensive plumbing and electrical upgrades, and a new electrical circuit for complete installation flexibility. Perfect for swapping and relocating and system type including solar tanks on single story roofs. 

(EXAMPLE - Replacing any existing system of any type then relocating it to a new position on the house that requires the electrical/plumbing to be installed or relocated to the new installation position)

🏆 Package Comparison Guide

Whenever a product is required, we only source from trusted, warranty‑backed manufacturers:

• Valves – AVG, RMC, Rye Metal (and subsidiaries)
• Copper – Type B Kembla or Crane
• PEX Systems - Ezipex
• Insulation – eFlex or K‑Flex
• Electrical switches & timers – Hager
• Conduit – Medium Duty PVC Vinidex or GTS
• Brassware – Brasshards
• Hydraulic crimp fittings – EziPress, Viega, Kembla
• Sealants – Loxeal

Feel free to let us know if you have any other preferred brands!

IMPORTANT - All online packages are for external installations only, for internal installations please complete our quote request form.
IMPORTANT - Solar panel and roof-mounted tank removal is not included in any package and is available as an optional extra at additional cost.

🛠 Need Help Choosing?

Not sure which package is right for you? Contact JR Gas & Water, and we’ll help you select the best solution for your home! 🚀

How Do STC Rebates Work?

Small-scale Technology Certificates, or STCs, are part of the Australian Government’s renewable energy scheme. Eligible heat pump and solar hot water systems can generate STCs, which carry a monetary value. JR Gas & Water applies this value as an upfront rebate so customers see a reduced out-of-pocket price on eligible products rather than needing to claim anything later themselves.

For clarity, JR Gas & Water uses a flat-rate STC rebate of $1,000 including GST on eligible systems. This means the price shown online is the customer’s out-of-pocket price after the rebate has already been applied. It is not the full gross system price before the rebate.

As an example, if a system is advertised online at $4,000, the gross system price is $5,000, less the $1,000 STC rebate, leaving the advertised out-of-pocket amount of $4,000.

This upfront rebate is offered on the basis that the installation will be completed compliantly, the system will remain eligible for STCs, and JR Gas & Water will be able to create, process, and receive the value of those certificates after installation. We handle the STC paperwork and process behind the scenes, but the rebate is conditional and relies on the job proceeding correctly from start to finish.

Who Is Eligible?

In general, customers may be eligible for the STC rebate where they are purchasing an approved solar hot water system, heat pump hot water system, or other eligible product that qualifies under the applicable scheme rules at the time of installation.

Eligibility generally requires that:
the product itself is STC eligible,
the installation address is eligible,
the system is installed in Australia,
the installation is completed in a compliant manner,
the system is capable of being properly verified,
and the customer provides any required information, declarations, signatures, and supporting documents needed to process the STCs.

Where JR Gas & Water advertises an eligible system with the rebate already applied, the customer is agreeing that the STCs will be assigned to JR Gas & Water or its nominated agent as part of the sale. That assignment is what allows the rebate to be applied upfront instead of the customer paying full price.

When Is the Rebate Not Available or Not Valid?

The STC rebate is not an automatic discount in every situation. It is only available where the installation proceeds fully and remains eligible for STC creation and assignment.

A customer may not be eligible, or may be required to repay the rebate amount, where:

the order is cancelled after rebate pricing has been applied,
the customer declines installation,
the site is not ready,
access is refused,
the installation cannot proceed due to hazards, animals, obstructions, or unsafe conditions,
the customer wants to keep the STCs personally,
required paperwork is not signed or returned,
incorrect or incomplete information is provided,
the property or system turns out not to qualify,
the quoted eligible product is changed,
a third party interferes with, alters, completes, disconnects, reconnects, or modifies the installation,
required compliance or upgrade works are refused,
or the installation cannot be lawfully completed in a way that allows the STCs to be validly claimed.

This also includes situations where another contractor performs part of the work in a way that affects eligibility, or where changes made by the customer or another trade prevent JR Gas & Water from receiving the STC benefit that the upfront rebate was based on.

What Happens If the Customer Does Not Proceed?

Where a customer accepts pricing that already includes the STC rebate and then cancels, postpones, declines installation, refuses access, or otherwise prevents the installation from being completed, JR Gas & Water may recover the full $1,000 STC rebate amount in addition to any other applicable cancellation, postponement, restocking, freight, attendance, or administrative charges.

This is because the lower advertised price was offered on the basis that JR Gas & Water would receive the benefit of the STCs after compliant completion of the installation. If the job does not proceed, that STC benefit cannot be recovered by JR Gas & Water, so the rebate amount becomes payable.

Can the Customer Keep the STCs Instead?

Yes, but not at the rebate-adjusted price.

If the customer wishes to keep, trade, or claim the STCs themselves, they must notify JR Gas & Water in writing before the order is accepted, or at the latest before installation begins. In that case, the customer must pay the full $1,000 including GST rebate amount before installation unless otherwise agreed in writing.

ZipPay – 6-Month Interest-Free on All Products

ZipPay allows you to buy now and pay later, offering flexible, interest-free payments for up to 6 months on all JR products. It’s easy to set up, and you can customize your repayment schedule to suit your budget. Payments can be made weekly, fortnightly, or monthly, with a $6 fee if the balance isn’t paid off by the due date​.

Humm – Up to 12 Months Interest-Free

Humm provides interest-free payment plans on purchases up to $30,000, perfect for both small and large buys. For items over $2,000, you can spread payments over 12 months. Humm also offers flexibility in scheduling payments based on when you get paid​

Afterpay – 8 Weeks, No Interest

With Afterpay, spread the cost of purchases across four equal installments, due every two weeks, over an 8-week period. There’s no interest, and as long as payments are made on time, there are no fees. Perfect for purchases between $100 and $1,500​

Plenti Finance – For Reclaim Systems Only

Plenti Finance is available exclusively for Reclaim Energy systems. This option offers tailored repayment terms with competitive interest rates, helping make eco-friendly choices more affordable. For more detailed information on Plenti’s terms and eligibility for Reclaim systems, visit the Reclaim Energy finance page​

Estimated annual savings are calculated by comparing the heat pump’s energy efficiency (measured as COP – Coefficient of Performance) against a standard electric hot water system with a COP of 1.0. For example, if a heat pump has a COP of 4.0, it uses 75% less electricity to deliver the same amount of hot water.

Savings are based on average household usage for a family of five on Tariff 11 (general usage tariff), using manufacturer-stated COP values. The higher the COP, the greater the energy savings.

Bonus savings: When paired with a solar PV system, energy costs can drop even further — with some households seeing up to 50% additional savings, especially when the heat pump runs during solar generation times.

Disclaimer:

All estimated savings are based on manufacturer-provided COP values and standard usage assumptions (e.g. a family of five on Tariff 11). These figures are intended as a general guide to help compare different hot water units and technologies. Actual savings may vary depending on your household’s usage, energy rates, and installation conditions. We recommend conducting your own research or consulting an energy advisor to assess what’s best for your specific setup.

If you're in Queensland and considering a heat pump hot water system, look no further than JR Gas & Water. Here's why:

Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of heat pump installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.

Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your heat pump hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.

Competitive Pricing: JR Gas & Water offers competitive pricing for their heat pump hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.

Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.

Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your heat pump hot water installation, you are supporting a local business and contributing to the local economy.

Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.

Sustainable and Environmentally Friendly: Heat pump hot water systems are a sustainable and environmentally friendly option for heating water. They use renewable energy sources, such as air or ground heat, to heat water, resulting in lower greenhouse gas emissions and reduced energy bills. JR Gas & Water can help you make the switch to a more sustainable and cost-effective solution for your hot water needs.