Hyjet MHR Series

• The Hyjet MHR20 is a dependable and compact solution for water supply systems that use both rainwater and mains water. Designed for homes, small buildings, and irrigation systems, this pump includes a Hydraulic Rains/Mains water changeover valve that automatically selects the water source—ensuring a steady water flow at all times.

  Thanks to its smart design, the MHR20 makes switching between rainwater and mains water seamless, energy-efficient, and maintenance-free.

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  Automatic Water Source Selection

  At the heart of the MHR20 is a fully integrated Hydraulic Rains/Mains water changeover valve. This valve automatically switches the water supply source from rainwater to mains when the tank is empty. When rainwater becomes available again, the system returns to using it—without any user input.

  This not only saves money on water bills but also supports sustainable water usage. As a result, the pump reduces reliance on mains water and makes better use of rainwater stored in tanks.

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  How the Hydraulic Rains/Mains Water Changeover Works

  Unlike electric valves, the Hydraulic Rains/Mains water changeover in the MHR20 pump uses hydraulic pressure to manage the switch. When there’s enough rainwater in the tank, the valve remains open, allowing rainwater to flow through. However, when the rainwater tank runs dry, the valve senses the lack of pressure and automatically opens the mains line.

  This smooth transition ensures the user experiences no drop in water pressure. In addition, it requires no electricity, which means it keeps working during power failures.

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  Designed for Everyday Use

  The MHR20 is ideal for a wide range of residential and light commercial applications. It supplies water to toilets, laundry machines, garden taps, and irrigation systems. As long as clean water is needed, this pump delivers it efficiently.

  Moreover, the built-in Hydraulic Rains/Mains water changeover system makes it ideal for places where people want to use tank water first—but need the reliability of mains water as backup.

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  Compact Yet Powerful

  Don’t let the size fool you. The Hyjet MHR20 offers excellent water pressure for domestic systems. It can deliver up to 45 litres per minute and reach a maximum head of 32 metres, making it suitable for multi-level homes or long pipe runs.

  Because of its compact design, the pump fits into tight spaces. You can install it inside a tank cover, a pump housing, or even in a small utility area.

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  Quiet and Energy-Efficient Operation

  In addition to being compact, the MHR20 runs quietly. This is especially important in residential settings where loud motors may disturb the peace. Its motor is designed to run with minimal vibration and noise.

  Also, since the Hydraulic Rains/Mains water changeover valve requires no power, overall energy use stays low. This improves the system’s efficiency and keeps operating costs down.

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  Durable Build for Long-Term Reliability

  The MHR20 is built with durable and rust-resistant materials. Its pump housing is made from stainless steel, which helps resist corrosion, even in humid or wet environments. The motor features thermal overload protection, which prevents damage if the pump overheats or runs dry.

  The Hydraulic Rains/Mains water changeover valve is made of high-quality brass and plastic components. This ensures a long lifespan with very little need for servicing.

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  Installation is Quick and Simple

  Installing the MHR20 is straightforward. It comes preassembled with the Hydraulic Rains/Mains water changeover valve and does not require wiring or complex programming.

  Most users can connect it with basic plumbing tools. This makes the pump suitable for new home builds, retrofits, or upgrades to older systems.

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  No Electrical Controls Needed

  A major advantage of the Hydraulic Rains/Mains water changeover system is that it works without electronic sensors or switches. Many systems on the market rely on electronic solenoids, which can fail or malfunction over time.

  Instead, the MHR20 uses water pressure to activate the valve. This makes it more reliable in areas prone to electrical surges or power cuts. It also means less maintenance, fewer parts to replace, and improved reliability over the long term.

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  Ideal for Water Efficiency and Sustainability

  More homeowners are turning to rainwater harvesting as a way to reduce their mains water use. With the MHR20 pump, you can efficiently use stored rainwater for toilets, washing machines, and outdoor taps—without having to manually switch valves or controls.

  And when rainwater is not available, the Hydraulic Rains/Mains water changeover ensures your system will never run dry.

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  Common Applications

  The Hyjet MHR20 is used in a variety of systems and settings:

  • Domestic rainwater harvesting systems

  • Toilet flushing and laundry supply

  • Garden and lawn irrigation

  • Backup water supply systems

  • Small office buildings or rental units

  • Rural properties with tank and mains access

  Its versatility makes it a go-to solution for plumbers, builders, and homeowners alike.

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  Key Benefits of the MHR20

  • Built-in Hydraulic Rains/Mains water changeover valve

  • Compact design fits small spaces

  • Flow rate up to 45 L/min

  • Maximum head up to 32 metres

  • No electrical valve needed

  • Quiet and energy-efficient motor

  • Simple installation and setup

  • Long-lasting materials with thermal protection

  • Great for new builds and system upgrades

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  The Hyjet MHR20 pump combines modern performance with simple operation. Thanks to its built-in Hydraulic Rains/Mains water changeover, users enjoy uninterrupted water supply—without touching a switch or worrying about power loss.

  Compact, quiet, and easy to install, it’s the perfect solution for anyone wanting to save water while staying connected to mains. Whether you’re building a new home or upgrading an older system, the MHR20 delivers dependable performance every day.

• Max Mains Pressure 500 KPa
• Max Pump Pressure 600 KPa
• Flow Rate >50 LPM
• Max Water Temperature 40°C
• Rainwater Inlet 25mm 1” BSP F
• Mains Water in 20mm 3/4” BSP F
• Outlets 20mm 3/4” BSP F

• Pump Body: AISI 304 Stainless Steel
• Impeller: Stainless Steel
• Motor Shaft: Stainless Steel
• Mech seal: Ceramic /Graphite / NBR

• Australian-made changeover valve
• Easy to install
• Does not require regular maintenance
• MHR20 valve – solid brass construction
• No in-tank float required
• Mains pressure not limited
• Certified dual check valve for backflow prevention

• Pump casing: Stainless steel AISI 304
• Motor shaft: Stainless steel AISI 304
• Impellers: Technopolymer
• Diffuser: Technopolymer
• Double mechanical seal: silicon carbide – graphite /ceramic – graphite
• Motor IP68
• Cooled motor (by water) of Class F and thermal protection
• Electric power cable HO7RN 5m with 3-pin

• Easy to install
• Full flow 1” Dual Outlets
• Patented design
• Does not require regular maintenance
• No electrical consumption – No electronic components
• Solid brass construction – Fully weatherproof – Built to last
• Suitable for any pressure pump with sufficient head pressure
• Can be mounted in any position
• No in-tank float required
• Mains pressure not limited
• Certified dual check valve for backflow prevention

Certified to: WaterMark ATS 5200.477 WMK 60075 Complies with AS/NZS 3500.1 when installed by a licensed plumber

Note: Should the static mains supply be greater than 400 kPa above the supply pressure of the pump, the device will not completely isolate mains water.

• Max mains pressure 1050 KPa
• Max pump pressure 1050 KPa
• Flow rate >200 LPM
• Max Water Temperature 50°C
• Rainwater Inlet 25mm 1” BSP F
• Mains Water in 25mm 1” BSP F
• Outlets 25mm 1” BSP F
• Weight 1.9 kg

The MaxiSAVE MHR Series is a fully automatic Hydraulic rain/mains water changeover device designed for pressure pump supply systems for harvesting rainwater for the toilet, laundry and household applications with automatic mains backup.

The MaxiSAVE MHR Valve is designed to operate with an electronic pressure controller with auto restart not requiring a float switch. This design makes the MaxiSAVE MHR system very simple to install.

The MaxiSAVE MHR Valve comes with dual 1” outlets, which makes the MaxiSAVE system unique and ideal for domestic and commercial applications.