Davey Rainbank KRB1 Supplied & Installed

DAVEY RAINBANK SUPPLY & INSTALLATION

Davey KRB1 RainBank Installation Brisbane & Gold Coast

JR Gas & Water supplies and professionally installs the Davey KRB1 RainBank across Brisbane, the Gold Coast and surrounding South East Queensland service areas.

The Davey KRB1 combines a RainBank automatic rainwater controller with a surface-mounted HP45-05 pump and top-entry tank float switch. It is designed to use stored rainwater first and automatically provide mains-water backup when suitable tank water is unavailable.

Davey positions the KRB1 for standard single-storey domestic rainwater applications, with a system duty of 40 litres per minute at 200kPa. Typical uses include toilet, laundry and suitable exterior rainwater outlets.

JR services Brisbane, the Gold Coast, Logan, Ipswich, Redlands, Moreton Bay and surrounding eligible South East Queensland areas.

Davey KRB1 quick answer: the KRB1 is a surface-mounted RainBank system using Davey's HP45-05 pump and a top-entry float switch in the rainwater tank. Davey rates the complete KRB1 system at 40L/min at 200kPa and positions it for normal single-storey domestic use. Rainwater receives priority, while mains water automatically maintains supply when the tank is low, empty or unavailable. Davey's current RainBank warranty is 36 months, subject to its warranty conditions.

Davey KRB1 Supply & Installation at a Glance

System Type

Surface-mounted automatic rainwater harvesting system with mains-water backup.

System Duty

40 L/min

Davey's published KRB1 duty is 40 litres per minute at 200kPa.

Pump

Davey HP45-05 horizontal multistage surface-mounted pump.

Best Suited To

Suitable single-storey homes using tank water for normal domestic rainwater applications.

Who Is the Davey KRB1 Best For?

Single-Storey Homes

Davey's current RainBank selection data places the KRB1 in the group intended to provide adequate pressure for most normal single-storey buildings.

Toilet & Laundry Rainwater

A practical option where the property uses collected rainwater for suitable household fixtures but still requires automatic mains backup.

Surface-Pump Replacements

Particularly relevant where the property already has a surface-mounted RainBank or pressure-pump arrangement beside the rainwater tank.

PRODUCT SUITABILITY

Is the Davey KRB1 Right for My Property?

A Good Choice If...

You have a suitable rainwater tank and need an automatic surface-mounted rainwater system for moderate single-storey household demand.

Consider Another System If...

You need higher flow, higher pressure, longer delivery runs, multi-storey supply or prefer the pump to be submerged inside the tank.

JR Should Check First If...

The existing tank, float switch, suction pipework, backflow arrangement, electrical supply or rainwater-to-mains plumbing has been altered or is uncertain.

How Does the Davey KRB1 RainBank Work?

Rainwater tank: stored rainwater is the preferred water source for the connected rainwater fixtures.

Top-entry float switch: the tank float tells the RainBank controller whether suitable water is available in the tank.

HP45-05 surface pump: the pump draws water from the tank and supplies the connected rainwater plumbing when rainwater is available.

RainBank controller: the controller automatically manages the change between rainwater and mains backup.

Mains backup: if rainwater is unavailable, the connected outlets continue receiving water from the mains supply without the homeowner needing to manually change valves.

What Does the RainBank Controller Do?

RainBank is a dual-source rainwater harvesting controller rather than a basic pressure switch.

Prioritises Rainwater

When suitable tank water is available, RainBank directs the system to use rainwater rather than mains supply.

Automatic Mains Backup

If tank water is unavailable, RainBank provides mains water to the connected outlets without needing manual source selection.

Operating Status

Indicator lights provide information about water source and fault conditions during system operation.

Davey also states that mains backup remains available during an electrical interruption even though the rainwater pump itself cannot operate without power.

Key Davey KRB1 Features

Surface-Mounted HP45-05 Pump

Pump equipment remains outside the tank for straightforward access and servicing.

40 L/min at 200kPa

Published complete-system duty suited to normal single-storey household rainwater applications.

Top-Entry Float Switch

The standard KRB1 uses a tank-mounted top-entry float switch to identify rainwater availability.

No Mains Re-Pumping

RainBank supplies mains water as the backup source without unnecessarily pumping mains water through the tank pump.

Built-In Dual Check

The RainBank controller incorporates a dual-check backflow protection valve as part of the unit.

WaterMark & AS/NZS 4020

Davey's RainBank documentation identifies WaterMark approval and testing for products in contact with safe drinking water.

Davey KRB1 Specifications

Specification	Davey KRB1
Brand	Davey
Model	KRB1
System Type	Surface-mounted dual-source rainwater harvesting system
RainBank Controller	Davey RainBank
Pump Model	HP45-05
Tank Level Control	Top-entry float switch
Published System Duty	40 L/min at 200kPa
Typical Davey Application	Adequate pressure for most normal single-storey buildings
HP45-05 Input Power	0.77kW
HP45-05 Output Power	0.55kW
HP45-05 Electrical Supply	220–240V ±6%, 50Hz, single phase
HP45-05 Full Load Current	3.4A
HP45-05 Enclosure Class	IP55
RainBank Supply	220–250V, 50Hz
RainBank Enclosure Class	IP23
Maximum RainBank Full Load Current	10A
Level Switch Voltage	12V DC
Top-Entry Float Lead Length	9m
Maximum Mains Water Pressure	900kPa controller limit, subject to applicable local mains-pressure requirements
Maximum RainBank Pump Pressure	600kPa controller limit
Mains Water Inlet	3/4" BSP male
Rainwater Inlet	1" BSP male
RainBank Outlet	3/4" BSP male
Continuous Water Temperature	1°C to 50°C
Maximum Ambient Temperature	50°C
Backflow Protection	Integrated dual-check valve within RainBank controller
Manufacturer Warranty	36 months, subject to current Davey warranty terms

The RainBank controller operating limits are not the same as the actual pump duty. The KRB1 complete-system selection point is 40L/min at 200kPa, while individual controller and HP45-05 component limits are published separately. Product specifications can change, so the current Davey installation documentation should be followed for the actual job.

Davey KRB1 Pump Size & Installation Space

The KRB1 uses Davey's compact HP45-05 surface-mounted pump together with the RainBank controller.

Davey's current HP45-05 technical data lists the related pump body at approximately 329mm along its main dimension, 100mm wide and 170mm high before allowing for the RainBank controller, pipework, valves and practical service clearances.

Davey's RainBank controller drawing shows an assembly approximately 390mm across the inlet-to-outlet direction, 120mm wide and approximately 150mm high through the main controller body.

Allow more than the published component dimensions. A real installation needs room for suction and delivery plumbing, isolation valves, electrical leads, float wiring, access to the pump and future servicing.

Surface-Mounted Pump Installation

The KRB1 pump is positioned outside the rainwater tank rather than submerged inside it.

Davey's installation instructions require the pump to be installed on a firm, well-drained base. A 600mm × 600mm concrete slab is identified by Davey as an ideal pump base where appropriate.

The pump position also needs to work with the top-entry float switch level and suction arrangement so the system can maintain reliable rainwater supply.

Firm and stable pump base

Well-drained installation area

Correct suction pipe size

Airtight suction connections

Suitable tank water level relationship

Access for pump servicing

Float lead able to reach controller

Suitable nearby electrical supply

Top-Entry Float Switch Requirements

Unlike Davey's floatless KRB1NF, the standard KRB1 uses a physical tank level switch.

Davey's current technical data lists a 9m level-switch lead for the top-entry version. The float position needs to allow the system to identify when usable tank water is available while helping avoid drawing settled material from the lowest part of the tank.

Davey's installation instructions recommend positioning the lowest anticipated float-switch operating level at least 100mm above the base of the tank to reduce the chance of sludge being drawn into the pump.

Suction Pipework & Priming

Surface-mounted pumps depend heavily on correct suction-side plumbing.

Air leaks, undersized pipe, excessive restrictions, poor valve selection or an unsuitable pump position can reduce performance and make the pump difficult to prime reliably.

Davey's current HP pump data lists a maximum suction head of 6m for the pump family, but that should not be treated as a target for every KRB1 installation. The complete suction length, elevation, pipe diameter, fittings and actual tank water level all affect real performance.

Where suction lift is involved, correct priming and a suitable foot-valve arrangement may also be required.

INSTALLATION REQUIREMENTS

What Is Required to Install a Davey KRB1?

Suitable rainwater tank and water source

Correct HP45-05 pump location

Firm, drained mounting base

Correct suction pipework

Correct delivery pipework

Top-entry float switch installed correctly

Suitable mains-water backup connection

Required backflow protection arrangement

Accessible isolation valves

Suitable electrical supply

RainBank controller kept accessible

Commissioning and source-switching test

Rainwater installations should be assessed as complete plumbing systems rather than treating the KRB1 as a standalone pump.

Rainwater Priority & Mains Backup

The KRB1's main purpose is to automatically manage two water sources.

When rainwater is available, the HP45-05 supplies the connected rainwater plumbing. If the tank level drops below the usable point, RainBank changes the supply over to mains water.

This avoids needing the homeowner to manually switch between the tank and mains whenever the weather changes.

Davey also designs RainBank so mains water is not unnecessarily pumped through the rainwater pump, helping avoid additional pump operation when the system is using mains backup.

Backflow Protection & Rainwater Plumbing

A rainwater-to-mains system needs to protect the potable mains supply from contamination by the alternative water source.

Davey's RainBank includes an integrated dual-check backflow protection valve and is designed to be installed in accordance with its installation instructions and applicable plumbing requirements.

The complete property arrangement still matters. Existing isolation valves, pipe identification, rainwater outlets and any additional backflow requirements should be assessed as part of the installation.

JR Installation Includes

The exact inclusions depend on the live installation package selected above and the existing condition of the property.

Replacement Installation

Suitable existing KRB1 or comparable rainwater systems can be removed and replaced where the tank, plumbing and electrical arrangement remain compatible.

Compliance & Commissioning

The installation is connected, tested and commissioned so rainwater supply, mains backup and basic system operation can be checked.

Possible Additional Work

Pipework, valves, backflow components, float setup, pump base or electrical work may need upgrading when the existing installation is not suitable.

Genuine Davey KRB1 system

HP45-05 surface-mounted pump

RainBank controller

Top-entry float switch arrangement

Existing-system removal where included

Connection to suitable rainwater pipework

Connection to suitable mains backup

Electrical work according to selected package

Leak and operational testing

Rainwater-to-mains switching check

Always use the live installation selector above as the final reference for the current JR package, inclusions and pricing.

What May Require Additional Work?

Major suction-line replacement or rerouting

Major rainwater delivery pipe changes

Rainwater tank repairs or structural modifications

Tank cleaning or sludge removal

New fixture pipework throughout the property

Major mains-water plumbing alterations

Non-standard backflow upgrades outside package scope

Major electrical upgrades

Structural pump bases outside selected scope

Rectification of unrelated plumbing defects

How Much Does Davey KRB1 Installation Cost?

Current supplied-and-installed pricing is shown through JR's live installation selector above rather than being hardcoded into this description.

A straightforward replacement using suitable existing plumbing and power is generally a different scope from a new system requiring changes to suction pipework, valves, mains backup, float-switch installation or electrical services.

Select the installation pathway that most closely matches the property and use the live package details above as the current pricing reference.

BRISBANE INSTALLATION

Davey KRB1 RainBank Installation Brisbane

JR Gas & Water supplies and installs Davey KRB1 RainBank systems throughout Greater Brisbane for suitable rainwater-system replacements and new domestic installations.

Brisbane homes commonly use rainwater for toilets, laundry and external applications. A properly configured KRB1 allows the home to make use of stored water when available while maintaining automatic mains backup as tank levels change.

JR also services Logan, Ipswich, Redlands and Moreton Bay, subject to current service-area and installation availability.

GOLD COAST INSTALLATION

Davey KRB1 RainBank Installation Gold Coast

JR Gas & Water provides KRB1 RainBank supply, replacement and installation across eligible Gold Coast service areas.

Existing Gold Coast rainwater systems can vary significantly in tank position, suction pipework, pump base, float-switch arrangement, mains-water connection and electrical supply.

JR checks whether the site supports a straightforward replacement or needs additional plumbing or electrical work before the final installation path is confirmed.

Can the Davey KRB1 Replace My Existing Rainwater System?

Replacing Another KRB1

Usually the simplest pathway where the tank, pump base, float switch, pipework and electrical services remain suitable.

Replacing Another Surface Pump

Often possible, but the suction arrangement, pipe sizes, valves, mains backup and tank-level control may need alteration.

New RainBank Installation

Requires planning of the complete rainwater system including tank supply, float switch, pump location, mains backup, backflow protection, power and connected outlets.

Davey KRB1 vs KRB2

The KRB1 and KRB2 are both surface-mounted RainBank systems but are designed for different hydraulic demands.

Feature	KRB1	KRB2
Surface Pump	HP45-05	HS50-06L
System Flow @ 200kPa	40 L/min	46 L/min
Davey Positioning	Single-storey homes	Higher-pressure / double-storey applications
Higher Pressure	Standard domestic duty	Greater capability
Higher Flow	Standard domestic duty	Greater capability

The larger KRB2 is not automatically the better option. The system should be matched to the actual outlets, pressure requirement, building height and pipework.

Davey KRB1 vs KRBS1 Submersible RainBank

KRB1 Surface Pump

Uses an HP45-05 pump mounted outside the rainwater tank with a separate top-entry float switch inside the tank.

Surface mounting makes the pump itself readily accessible for inspection and servicing.

KRBS1 Submersible Pump

Uses a D42A/B pump submerged inside the tank, reducing external pump equipment and providing a different servicing and installation arrangement.

Davey rates both KRB1 and KRBS1 at 40L/min at 200kPa for standard single-storey applications.

The better fit depends on the existing plumbing, available pump space, tank access, noise considerations and whether the current system is already surface mounted or submersible.

Rainwater Uses & Water Quality

Davey commonly positions RainBank for applications such as toilet flushing, laundry supply, garden irrigation and suitable exterior taps.

RainBank manages which water source supplies the connected fixtures. It is not itself a filtration or water-treatment system.

If collected rainwater is intended for additional household uses, filtration, treatment, tank condition and water quality should be considered according to the intended application.

Davey's AS/NZS 4020 testing relates to product materials in contact with safe drinking water; it does not make untreated rainwater potable.

Electrical Requirements

The KRB1's HP45-05 pump is a single-phase 220–240V, 50Hz unit with a published full-load current of 3.4A and 0.77kW input power.

The RainBank controller uses a 220–250V, 50Hz supply. Davey's installation instructions require the installation position to have a suitable power point within reach of the RainBank power lead.

Davey advises against using long mains extension leads because excessive voltage drop can affect pump performance and motor operation.

Where the selected installation requires a new or altered electrical supply, the appropriate electrical work needs to form part of the installation scope.

COMMON QUESTIONS

Davey KRB1 Installation FAQs

What is the Davey KRB1?

The KRB1 is a surface-mounted Davey RainBank system combining an HP45-05 pump, RainBank automatic rain-to-mains controller and top-entry tank float switch.

What flow rate does the KRB1 provide?

Davey rates the KRB1 complete system at 40 litres per minute at 200kPa. Actual fixture performance depends on the pipework, elevation and total system resistance.

Is the KRB1 suitable for a single-storey house?

Yes. Davey's selection guide places the KRB1 among the RainBank systems providing adequate pressure for most normal single-storey buildings.

What pump does the KRB1 use?

The standard KRB1 uses Davey's HP45-05 surface-mounted horizontal multistage pump.

How powerful is the HP45-05 pump?

Davey's current technical data lists 0.77kW input power, 0.55kW output power and a 3.4A full-load current.

Does the pump sit inside the tank?

No. The KRB1 uses a surface-mounted pump outside the tank. The KRBS1 is the comparable Davey RainBank model using an in-tank submersible pump.

Does the KRB1 use a float switch?

Yes. The standard KRB1 uses a top-entry tank float switch. Davey's current data lists a 9m lead for the top-entry float arrangement.

What is the difference between KRB1 and KRB1NF?

KRB1 uses an external tank float switch to detect rainwater availability. KRB1NF is Davey's floatless surface-pump version and is intended for suitable flooded-suction installations.

Does the KRB1 automatically switch to mains water?

Yes. RainBank gives rainwater priority and automatically provides mains backup when usable tank water is unavailable.

What happens when the rainwater tank is empty?

RainBank changes the connected rainwater outlets to mains-water backup so normal supply can continue.

What happens during a power outage?

Davey states that RainBank maintains mains-water backup during an electrical interruption. The surface pump itself cannot deliver rainwater without electricity.

Can the KRB1 supply toilets and laundry?

Yes. These are among the normal domestic applications Davey identifies for RainBank systems where the complete installation is appropriately sized.

Can the KRB1 supply garden taps?

RainBank can also supply suitable exterior outlets. Simultaneous household demand still needs to remain appropriate for the KRB1's performance.

Can the KRB1 be used for irrigation?

Davey includes irrigation among RainBank applications, but larger irrigation flow requirements may justify a higher-output pump system.

Does RainBank include backflow protection?

The RainBank controller incorporates a dual-check backflow valve. The complete property installation must still meet the applicable plumbing and backflow requirements.

Can the KRB1 replace my existing RainBank system?

Often, yes. Suitability depends on the tank, pump location, float switch, suction pipework, delivery pipework, mains backup and electrical supply.

Can it replace another surface-mounted pump?

Potentially. The KRB1 also introduces RainBank source switching and a tank float arrangement, so pipework and controls may need modification when replacing a basic pump-only system.

Can the KRB1 draw water from below the pump?

The HP pump family can support suitable suction-lift installations, but reliable operation depends on the complete suction arrangement, priming, pipe sizing and water level. Davey's pump data lists a maximum suction head of 6m for the HP pump family.

Does the KRB1 require priming?

Yes. A surface-mounted pump needs to be correctly primed where required by the installation arrangement. Repeated loss of prime should be investigated rather than simply restarting the pump.

What warranty does the Davey KRB1 have?

Davey's current Australian RainBank information lists a 36-month manufacturer warranty, subject to the current warranty conditions and installation requirements.

Can JR install the KRB1 in Brisbane?

Yes. JR provides suitable RainBank and pump installation throughout Greater Brisbane and surrounding eligible South East Queensland areas.

Can JR install the KRB1 on the Gold Coast?

Yes. JR provides suitable Davey pump and RainBank installation across eligible Gold Coast service areas.

How much does Davey KRB1 installation cost?

Current supplied-and-installed pricing is shown in JR's live installation selector above. Final scope depends on whether the job is a straightforward replacement or requires plumbing, float-switch, backflow, pump-base or electrical changes.

Davey KRB1 Warranty & Maintenance

36-Month Davey Warranty

Davey's current Australian RainBank information lists a 36-month manufacturer warranty, subject to Davey's current terms and conditions.

Maintain Pump Access

The surface-mounted pump, RainBank controller, isolation valves and priming points should remain accessible for future inspection and servicing.

Maintain the Complete System

Tank condition, float-switch operation, suction plumbing, valves and connected rainwater pipework all affect long-term system reliability.

Davey's manufacturer warranty is separate from JR's installation workmanship and support terms. Current JR package terms should be used for the installation warranty applying to the selected job.

Why Choose JR Gas & Water for Davey KRB1 Installation?

LICENSED

Plumbing and associated installation work completed by appropriately licensed tradespeople.

SYSTEM PLANNING

Tank layout, pump location, float arrangement, plumbing and mains backup considered together.

COMMISSIONING

Rainwater supply, mains backup and basic system operation checked as part of the completed installation scope.

SEQ

Brisbane, Gold Coast and surrounding South East Queensland service coverage.

A RainBank system needs the pump, tank, float switch, suction pipework, mains backup, backflow protection and electrical supply to work together. JR assesses the complete installation rather than treating the KRB1 as a pump-only replacement.

COMPARE YOUR OPTIONS

Compare Water Pump & RainBank Options

Compare the KRB1 with JR's wider live pump range if your property needs higher flow, additional pressure, a submersible pump, a floatless RainBank or another type of rainwater or household pressure system.

Water Pumps →

READY TO INSTALL

Install the Davey KRB1 With JR Gas & Water

The Davey KRB1 is a practical surface-mounted RainBank option for suitable single-storey homes wanting automatic rainwater priority with mains-water backup.

Before installation, confirm the tank arrangement, pump location, suction pipework, float-switch setup, connected fixtures, mains-water arrangement, electrical supply and whether the job is a straightforward replacement or requires system changes.