Davey Rainbank KRBS1 Submersible Supplied & Installed

DAVEY RAINWATER SYSTEM SUPPLY & INSTALLATION

Davey KRBS1 RainBank Installation Brisbane & Gold Coast

JR Gas & Water supplies and professionally installs the Davey KRBS1 RainBank with submersible pump across Brisbane, the Gold Coast and surrounding South East Queensland service areas.

The KRBS1 is an automatic dual-source rainwater harvesting system combining a Davey RainBank controller with a D42A/B submersible pump installed inside the rainwater tank.

The system gives stored rainwater priority when it is available and automatically uses mains water backup when rainwater is unavailable, helping maintain normal supply to connected fixtures without requiring the homeowner to manually change water sources.

Davey positions the KRBS1 primarily for normal single-storey household rainwater applications, including suitable toilet, laundry and exterior-tap supply.

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

Davey KRBS1 quick answer: the KRBS1 combines a Davey RainBank automatic rain-to-mains controller with a D42A/B submersible pump inside the tank. Davey rates the KRBS1 system at 40L/min at 200kPa and positions it for standard single-storey domestic rainwater applications. Rainwater is used first when available, with automatic mains backup when the tank supply is unavailable. The current manufacturer warranty is 36 months, subject to Davey's warranty conditions.

Davey KRBS1 Supply & Installation at a Glance

System Type

Automatic dual-source rainwater harvesting system with an in-tank submersible pump.

Rated System Flow

40 L/min

Davey rates the KRBS1 at 40 litres per minute at 200kPa.

Best Suited To

Standard domestic rainwater use in suitable single-storey homes, including toilets, laundry and other approved rainwater outlets.

Pump Location

The D42A/B pump is installed inside the rainwater tank rather than beside the tank.

Who Is the Davey KRBS1 Best For?

Single-Storey Homes

Davey's current selection guide places the KRBS1 in the range suited to adequate pressure for most normal single-storey residential applications.

Rainwater for Toilets & Laundry

A practical choice where stored rainwater is used for suitable household fixtures but automatic mains backup is still required.

Submersible Pump Installations

Suitable where placing the pump inside the tank is preferred over having a separate surface pump installed beside the tank.

PRODUCT SUITABILITY

Is the Davey KRBS1 Right for My Property?

A Good Choice If...

You need automatic rainwater supply with mains backup for a suitable single-storey home and your expected flow demand fits the KRBS1's 40L/min-at-200kPa system rating.

Consider Another System If...

The property has higher simultaneous demand, multiple storeys, long pipe runs, higher pressure requirements or a larger irrigation load that needs greater system performance.

JR Should Check First If...

The existing tank configuration, mains backup arrangement, backflow protection, pump access, electrical supply or connected fixture layout is uncertain.

How Does the Davey KRBS1 RainBank System Work?

Rainwater tank: stored rainwater provides the preferred water source for the connected rainwater plumbing.

D42A/B submersible pump: the pump sits inside the tank and supplies pressurised rainwater through the RainBank system when water is available.

RainBank controller: the controller manages the relationship between the rainwater supply and the mains backup supply.

Automatic mains backup: when rainwater is unavailable, the system automatically supplies mains water to maintain service to the connected outlets.

Rainwater returns automatically: when suitable rainwater supply becomes available again, the system returns to rainwater operation without the homeowner needing to manually switch valves.

Why Use a Submersible Rainwater Pump?

In the KRBS1, the main pump sits inside the rainwater tank rather than on a slab or bracket beside it.

Cleaner External Layout

Keeping the pump inside the tank reduces the amount of pump equipment that needs to sit beside the tank externally.

Quieter Pump Location

Davey identifies quieter running as one of the benefits of its submersible RainBank arrangements, which can be useful on smaller residential blocks.

Protected Pump Position

An in-tank pump is less accessible to children, pets and casual physical interference than an exposed surface-mounted unit.

The trade-off is that suitable tank access must be maintained so the pump can be removed for future inspection or service.

Key Davey KRBS1 Features

Rainwater Priority

RainBank is designed to use rainwater before mains water when suitable tank water is available.

Automatic Mains Backup

Mains supply is automatically available when rainwater cannot provide the required household supply.

Submersible Float Pump

KRBS1 uses Davey's D42A/B submersible pump arrangement with automatic float functionality.

Status Indication

The RainBank controller provides status indication for operating and fault conditions.

Built-In Backflow Protection

Davey's RainBank incorporates a dual-check backflow protection valve as part of the controller design.

Drinking-Water Contact Compliance

Davey's RainBank range is tested for compliance with AS/NZS 4020 for products used in contact with safe drinking water.

Davey KRBS1 Specifications

Specification	Davey KRBS1
Brand	Davey
Model	KRBS1
System Type	Dual-source rainwater harvesting system
Controller	Davey RainBank
Pump Model	D42A/B submersible pump
Pump Arrangement	Submersible in-tank pump with float
System Flow Rate	40 L/min at 200kPa
Typical Davey Application	Normal single-storey domestic rainwater harvesting
Maximum Mains Pressure	600kPa
Maximum RainBank Pump Pressure	600kPa
RainBank Mains Water Inlet	3/4" BSP male
Rainwater Inlet	1" BSP male
RainBank Outlet	3/4" BSP male
Electrical Supply	220–250V, 50Hz
Maximum RainBank Full Load Current	10A
Controller Enclosure Class	IP23
Continuous Water Temperature Range	1°C to 50°C
Maximum Ambient Temperature	50°C
Controller Backflow Protection	Integrated dual-check valve
Manufacturer Warranty	36 months, subject to current Davey warranty conditions

The 40L/min figure is the KRBS1 RainBank system rating at 200kPa. The D42A/B pump itself has separate bare-pump performance data, so pump maximum open-flow figures should not be confused with the complete KRBS1 system duty point. Product specifications can change; current Davey installation documentation should be followed for the actual installation.

KRBS1 Flow & Household Demand

Davey's current RainBank selection information rates the KRBS1 at 40L/min at 200kPa and places it in the group intended to provide adequate pressure for most normal single-storey homes.

JR's current product selector also positions the KRBS1 as a lighter-duty submersible rainwater system rather than a high-flow model.

Flow requirements still depend on how many rainwater outlets can operate at the same time. Toilets, washing machines, external taps and irrigation can create very different peak demands.

Bigger is not automatically better. Rainwater pumps should be selected around actual simultaneous flow, pressure, pipework and building layout rather than simply choosing the highest-flow pump available.

INSTALLATION REQUIREMENTS

What Is Required to Install a Davey KRBS1?

The KRBS1 is more than a pump replacement because it integrates stored rainwater with the property's mains-water plumbing.

Suitable rainwater tank

Safe access into or through the tank opening

Suitable pump delivery pipework

Correct rainwater plumbing layout

Suitable mains-water connection

Accessible isolation valves

Required backflow protection arrangement

Suitable electrical supply

Adequate controller mounting position

Appropriate pump cable routing

Float switch able to operate freely

Access retained for future pump servicing

The actual plumbing and backflow requirements depend on how the existing rainwater system has been configured and what fixtures it supplies.

Submersible Pump Installation Inside the Tank

Davey's KRBS1 arrangement uses the D42A/B pump inside the rainwater tank.

Davey's installation instructions specify that the pump should be lowered using its handle and a suitable rope rather than pulling on the electrical lead. The pump cable is secured appropriately to the delivery pipe and the float switch must have enough room to operate correctly.

Davey also recommends a suitable floating inlet for the D42A/B where applicable to help minimise the possibility of drawing settled sludge from the bottom of the rainwater tank.

Tank access therefore matters both at initial installation and later when the pump requires inspection, cleaning or replacement.

Rainwater Priority & Mains Water Backup

RainBank is designed as a dual-source controller rather than a system that pumps mains water through the rainwater pump.

When suitable rainwater is available, the pump supplies the connected rainwater fixtures. When the tank supply is unavailable, RainBank allows mains water to maintain supply to those connected fixtures.

Davey also states that mains backup remains available during electrical interruptions, helping maintain household service even when the pump cannot operate.

This automatic source management is one of the main differences between the KRBS1 and a simple standalone tank pump.

Backflow Protection & Rainwater Plumbing

Connecting rainwater and mains-water services requires the two supplies to be managed correctly so rainwater cannot contaminate the potable mains supply.

Davey's RainBank incorporates a dual-check backflow protection valve as part of its controller design and is intended to be installed in accordance with the applicable plumbing requirements and Davey's installation instructions.

Existing properties may already have isolation, identification and backflow arrangements associated with their rainwater system. These should be assessed rather than assuming every existing installation can simply accept a new controller without modification.

JR Installation Includes

The exact inclusions depend on the live installation option selected and the existing condition of the property, but a suitable KRBS1 installation pathway can include:

Genuine Davey KRBS1 RainBank system

D42A/B submersible pump

Removal of an existing pump system where applicable

Installation of pump into suitable rainwater tank

RainBank controller installation

Connection to suitable existing rainwater pipework

Connection to suitable mains backup arrangement

Electrical connection according to installation scope

Operational testing

Rainwater-to-mains switching test

Leak checking

Basic system handover

The live selector above is the final reference for the current installation package, inclusions and price.

What May Require Additional Work?

Rainwater tank repairs or structural tank modifications

Tank cleaning or sludge removal

Major rainwater pipework rerouting

New fixture pipework throughout the building

Major changes to existing mains-water plumbing

Non-standard backflow upgrades outside package scope

Major electrical upgrades

Difficult or unsafe tank access work

Specialist rainwater filtration systems

Rectification of unrelated plumbing defects

If the existing rainwater system is incomplete, damaged or not suitable for a straightforward KRBS1 installation, JR can identify the additional work before proceeding.

How Much Does Davey KRBS1 Installation Cost?

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

A straightforward replacement of an existing compatible RainBank-style system can require less work than a completely new installation with new rainwater, mains, backflow or electrical connections.

Tank access, pipework condition, existing valves, mains-water arrangement, controller location, electrical supply and the condition of the existing pump system can all affect installation scope.

BRISBANE INSTALLATION

Davey KRBS1 RainBank Installation Brisbane

JR Gas & Water supplies and installs Davey KRBS1 submersible RainBank systems throughout Greater Brisbane for suitable household rainwater harvesting and replacement applications.

Brisbane properties commonly use rainwater tanks for toilets, laundries and external taps. A correctly configured RainBank system allows the property to use stored rainwater when available while retaining automatic mains backup when the tank supply cannot meet demand.

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

GOLD COAST INSTALLATION

Davey KRBS1 RainBank Installation Gold Coast

JR Gas & Water provides KRBS1 rainwater-system supply, replacement and installation across eligible Gold Coast service areas.

Existing rainwater systems can vary significantly in tank access, pump type, controller arrangement, water-point layout, backflow protection and electrical configuration.

JR assesses whether the existing setup suits a straightforward KRBS1 replacement or whether additional plumbing or electrical changes are required for reliable long-term operation.

Can the Davey KRBS1 Replace My Existing Rainwater Pump?

Existing KRBS1

Replacing another KRBS1 is generally the most straightforward pathway where the tank, RainBank plumbing and electrical setup remain serviceable.

Existing RainBank System

A KRBS1 may replace another compatible domestic RainBank arrangement, but controller, pump, pipework, float and connection details still need to be checked.

Completely New Rainwater System

New installations require planning of the tank connection, rainwater plumbing, mains backup, backflow protection, electrical supply and intended outlets.

Davey KRBS1 vs KRBS2

Both systems use a submersible pump inside the tank and a Davey RainBank controller, but they target different flow and pressure requirements.

Feature	KRBS1	KRBS2
Submersible Pump	D42A/B	D53A/B
System Flow @ 200kPa	40 L/min	63 L/min
General Davey Positioning	Standard single-storey domestic applications	Higher-flow and higher-pressure applications
Higher Flow Capability	Lower	Higher
Typical Choice	Moderate household rainwater demand	Larger demand, longer runs or more demanding layouts

The larger KRBS2 is not automatically the better choice. The appropriate system depends on actual simultaneous demand, pipework, elevation and the fixtures connected to the rainwater supply.

Davey KRBS1 vs Surface-Mounted RainBank

KRBS1 Submersible

The pump sits inside the rainwater tank. This can reduce external pump clutter and can provide quieter operation around the outside of the home.

Surface-Mounted RainBank

The pressure pump sits outside the tank, which can make the pump itself easier to access but requires suitable external mounting space and suction-side plumbing.

The best arrangement depends on tank access, existing plumbing, noise preferences, servicing needs and whether the current system is already submersible or surface mounted.

Rainwater Uses & Water Quality

The KRBS1 is commonly used where rainwater supplies toilets, laundry and suitable external outlets.

The RainBank system controls the water source; it does not automatically make collected rainwater suitable for every possible household use.

Where rainwater is intended for uses requiring higher water quality, the tank, collection system, filtration, treatment and plumbing design need to suit that intended use.

Davey's AS/NZS 4020 compliance relates to product materials being suitable for contact with safe drinking water and should not be interpreted as certifying untreated tank water as drinking water.

Electrical Requirements

Davey's RainBank controller operates from a standard single-phase electrical supply and the submersible pump is electrically connected as part of the RainBank system.

Electrical connections, pump lead length, cable routing and the location of the controller need to suit the actual tank and building layout.

Davey's installation instructions also recommend suitable residual-current and surge protection arrangements for the installation.

If the existing electrical supply is unsuitable or a new connection is required, that work needs to be included in the appropriate installation scope.

COMMON QUESTIONS

Davey KRBS1 Installation FAQs

What is the Davey KRBS1?

The KRBS1 is a Davey RainBank dual-source rainwater harvesting system combining a RainBank controller with a D42A/B submersible pump installed inside the rainwater tank.

How much water can the KRBS1 supply?

Davey rates the complete KRBS1 system at 40 litres per minute at 200kPa. Actual performance at the fixtures depends on the installation, pipework and total system resistance.

Is the KRBS1 suitable for a single-storey house?

Yes. Davey's current RainBank selection guide places the KRBS1 in the range providing adequate pressure for most standard single-storey residential applications.

Is the KRBS1 suitable for a two-storey house?

It may not be the preferred system where higher pressure, longer pipe runs or greater simultaneous flow are required. Davey positions higher-output systems such as the KRBS2 for more demanding applications.

What pump is supplied with the KRBS1?

Davey specifies the D42A/B submersible float pump for the KRBS1 system.

Does the pump sit inside the rainwater tank?

Yes. The KRBS1 is a submersible RainBank model, so the pump operates inside the tank rather than being mounted beside it.

Does the KRBS1 automatically switch to mains water?

Yes. RainBank prioritises rainwater and provides automatic mains-water backup when suitable rainwater is unavailable.

What happens when the rainwater tank is empty?

The RainBank arrangement provides mains backup to the connected rainwater fixtures so normal supply can continue.

What happens during a power outage?

Davey states that RainBank provides mains-water backup during electrical interruptions, although the submersible pump itself cannot operate without power.

Does the KRBS1 require a separate float switch in the tank?

The D42A/B submersible arrangement uses its own automatic float system for water-level operation, so the installation differs from RainBank models using a separate tank-mounted level switch.

Can the KRBS1 supply toilets and laundry?

Yes. Davey identifies RainBank as suitable for metropolitan household rainwater harvesting applications including toilet and laundry supply, provided the complete system is correctly sized and installed.

Can it supply garden taps?

RainBank can also be used with suitable exterior taps. Total simultaneous flow still needs to remain appropriate for the KRBS1 system.

Does RainBank include backflow protection?

Davey's controller incorporates a dual-check backflow protection valve. The complete property installation still needs to meet the applicable plumbing and backflow requirements.

Can the KRBS1 replace my current RainBank system?

Often, yes. Suitability depends on the existing tank arrangement, pipework, pump type, mains backup plumbing, electrical supply and connected outlets.

Can it replace a surface-mounted rainwater pump?

Potentially, but converting from a surface pump to an in-tank submersible system can require changes to pipework, pump access, electrical cabling and the rainwater-controller arrangement.

What is the difference between KRBS1 and KRBS2?

KRBS1 uses the D42A/B pump and is rated at 40L/min at 200kPa. KRBS2 uses the larger D53A/B pump and is rated at 63L/min at 200kPa, making it better suited to higher-flow and higher-pressure applications.

Is the KRBS1 quieter than a surface pump?

Davey identifies quieter running as one of the benefits of its submersible in-tank RainBank arrangements because the pump itself operates inside the tank.

Does the tank need to be accessible?

Yes. Suitable tank access is important for installing, removing and servicing the submersible pump and its associated pipework and cabling.

Does the KRBS1 filter my rainwater?

RainBank manages the water source and pump operation. Any filtration or water-treatment requirements depend on the quality of the collected rainwater and its intended use.

What warranty does the Davey KRBS1 have?

Davey's current Australian product information lists a 36-month manufacturer warranty for the RainBank with submersible pump range, subject to current warranty terms and installation requirements.

Can JR install the KRBS1 in Brisbane?

Yes. JR supplies and installs suitable RainBank and water-pump systems throughout Greater Brisbane and surrounding eligible South East Queensland service areas.

Can JR install the KRBS1 on the Gold Coast?

Yes. JR provides suitable KRBS1 supply and installation across eligible Gold Coast service areas.

How much does Davey KRBS1 installation cost?

Current supplied-and-installed pricing is displayed through JR's live installation selector above. Installation cost depends on whether the job is a straightforward replacement or requires changes to plumbing, electrical, tank access, backflow protection or other parts of the existing system.

Davey KRBS1 Warranty & Maintenance

36-Month Davey Warranty

Davey's current Australian KRBS1 product information lists a 36-month manufacturer warranty, subject to the applicable warranty conditions.

Maintain Tank Access

Keep the tank opening and pump-removal pathway accessible so the submersible pump can be inspected or serviced when required.

Maintain the Complete System

Tank condition, float movement, filters where fitted, controller operation, valves and connected pipework all affect overall rainwater-system reliability.

Why Choose JR Gas & Water for KRBS1 Installation?

LICENSED

Plumbing and associated installation work completed through appropriately licensed tradespeople.

SYSTEM CHECK

Tank layout, rainwater plumbing, mains backup, electrical supply and connected outlets considered before installation.

REPLACEMENT

Suitable for straightforward RainBank replacements as well as installations requiring additional system changes.

SEQ

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

A RainBank system needs the pump, tank, mains backup, rainwater pipework, backflow protection and electrical supply to work together. JR assesses the complete setup so the KRBS1 is installed around the way the property actually uses rainwater rather than treating it as a pump-only replacement.

COMPARE YOUR OPTIONS

Compare Water Pump & RainBank Options

Compare the KRBS1 with JR's wider live pump range if your property needs a different flow rate, higher pressure, a surface-mounted pump, a larger submersible RainBank or another type of household water system.

Water Pumps →

READY TO INSTALL

Install the Davey KRBS1 With JR Gas & Water

The Davey KRBS1 is a practical option for suitable single-storey homes that want an in-tank submersible rainwater pump with automatic RainBank mains backup.

Before installation, confirm the tank setup, connected fixtures, rainwater pipework, mains-water arrangement, electrical supply, pump access and whether the job is a straightforward replacement or requires system upgrades.