DAVEY RAINBANK INSTALLATION
Davey KRBS2 RainBank Installation Brisbane & Gold Coast
JR Gas & Water supplies and installs the Davey KRBS2 RainBank rainwater harvesting system across eligible Brisbane, Gold Coast and surrounding South East Queensland service areas.
The KRBS2 combines a Davey RainBank automatic rainwater controller with the higher-performance D53A/B submersible in-tank pump. The system is designed to use stored rainwater whenever it is available and automatically provide mains-water backup when the tank supply is unavailable.
Davey positions the KRBS2 above the lighter KRBS1 system for properties requiring higher pressure and higher flow. It is particularly relevant to double-storey homes, longer pipe runs and household rainwater installations with stronger demand.
Davey KRBS2 at a glance: RainBank automatic rainwater/mains changeover, D53A/B submersible pump, 63 L/min at 200kPa system performance, up to 130 L/min maximum pump flow, 45m maximum pump head, 220–240V single-phase electrical supply, IPX8 submersible pump construction and 36-month published RainBank system warranty.
Davey KRBS2 Supply & Installation at a Glance
Flow at 200kPa
Davey publishes 63 L/min at 200kPa for the KRBS2 RainBank package.
Submersible Pump
The system uses the D53A/B high-pressure submersible pump installed inside the rainwater tank.
Automatic Changeover
RainBank automatically prioritises rainwater and provides mains-water backup when rainwater is unavailable.
Higher-Demand Applications
Davey specifically identifies the KRBS2 as a higher-pressure and higher-flow option for more demanding domestic installations.
What Is the Davey KRBS2 RainBank?
The Davey KRBS2 is a dual-source rainwater harvesting package built around a RainBank controller and the D53A/B submersible pump.
The controller manages the relationship between stored rainwater and the property's mains-water backup. When usable tank water is available, the rainwater system supplies the connected fixtures. When tank water is unavailable, RainBank changes over to mains supply so the connected household services can continue operating.
This makes the KRBS2 substantially different from a simple rainwater transfer pump. It is intended to form part of a complete domestic rainwater reuse system rather than merely pumping water from one location to another.
Because the D53A/B pump sits inside the tank, the installation also avoids the need for a conventional surface-mounted pressure pump beside the tank.
What Can the Davey KRBS2 Supply?
RainBank systems are commonly used to supply approved household rainwater fixtures such as toilets, washing-machine cold-water supply and selected outdoor or garden taps, subject to the property's plumbing arrangement and applicable requirements.
The KRBS2 is the higher-performance submersible option within Davey's domestic RainBank range.
Davey's selection material positions the KRBS2 for applications where higher pressure, higher flow, double-storey layouts or longer pipe runs make a lighter pump less suitable.
The actual number of fixtures that can operate satisfactorily depends on pipework, elevation, pressure losses and simultaneous demand rather than the pump flow figure alone.
Why Choose the Davey KRBS2?
63 L/min at 200kPa
The KRBS2 provides substantially stronger published performance than Davey's smaller KRBS1 and KRBSA1 submersible RainBank packages.
Automatic Mains Backup
The RainBank controller removes the need for normal manual switching between tank water and mains-water supply.
In-Tank Pump
The D53A/B is submerged inside the rainwater tank, keeping the primary pump assembly away from the external wall or tank area.
Higher Pressure Capability
Davey identifies KRBS2 for homes needing stronger pressure performance, including more demanding double-storey installations.
Higher Flow Capability
The D53A/B pump itself can deliver up to approximately 130 L/min depending on system head and operating point.
Davey Product Support
The KRBS2 sits within Davey's established RainBank and domestic water-pressure product range with manufacturer documentation and service support.
PRODUCT SUITABILITY
Is the Davey KRBS2 Right for My Property?
A Good Choice If...
You need automatic rainwater-to-mains changeover, want a submersible pump inside the tank and need stronger flow or pressure than a light-duty RainBank setup.
Consider a Smaller System If...
Your property has only light rainwater demand and does not require the higher pressure and flow capability of the D53A/B pump.
JR Should Check First If...
You have unusual tank access, long electrical or pump-lead requirements, non-standard mains pressure, extensive pipe runs, several simultaneous fixtures or an existing system with unclear backflow arrangements.
Davey KRBS2 vs KRBS1
| Specification | KRBS1 | KRBS2 |
|---|---|---|
| Submersible Pump | D42A/B | D53A/B |
| Flow at 200kPa | 40 L/min | 63 L/min |
| Pump Maximum Flow | 120 L/min | 130 L/min |
| Pump Maximum Head | 32m | 45m |
| Pump Motor Output | 0.60kW | 0.84kW |
| Pump Input Power | 1.00kW | 1.31kW |
| Typical Davey Positioning | Single-storey / moderate demand | Double-storey / higher pressure and flow |
The KRBS2 should therefore be selected because the property genuinely needs its stronger hydraulic performance rather than simply because it is the larger model.
Davey KRBS2 Specifications
| Brand | Davey |
|---|---|
| System Model | KRBS2 |
| Long-Lead Version | KRBS2/20 |
| Controller Type | Davey RainBank automatic rainwater harvesting controller |
| Pump Model | D53A/B |
| Pump Type | High-pressure submersible centrifugal pump |
| Published System Flow | 63 L/min at 200kPa |
| Pump Maximum Flow | Approx. 130 L/min |
| Pump Maximum Total Head | 45m |
| Maximum Pump Submergence | 12m |
| Maximum Pumped Water Temperature | 40°C |
| Maximum Soft Solids | 1.9mm |
| Pump Outlet | 1" BSP female |
| Electrical Supply | 220–240V / 50Hz single phase |
| Pump Speed | 2850rpm |
| Running Current | 5.7A |
| Locked Rotor Current | 14A |
| Pump Input Power | 1.31kW |
| Pump Motor Output | 0.84kW |
| Pump IP Rating | IPX8 |
| Motor Insulation | Class F |
| Standard Pump Lead | 10m |
| KRBS2/20 Lead | 20m |
| Pump Height | Approx. 535mm |
| Pump Net Weight | Approx. 16.5kg |
| Published RainBank System Warranty | 36 months |
The 63 L/min figure is Davey's published KRBS2 system flow at 200kPa. The D53A/B pump's 130 L/min figure is its maximum pump capacity under low-head conditions and should not be treated as the normal household delivery rate.
D53A/B Submersible Pump Construction
The D53A/B is designed for pumping clean rainwater and uses corrosion-resistant materials across key pump components.
Stainless Components
The pump uses a 304 stainless-steel motor shell, shaft and fasteners, together with a cast 316 stainless-steel lower bearing housing and upper motor cover.
Closed Impeller Design
Davey's closed-impeller centrifugal layout is intended to provide reliable high-pressure clean-water pumping.
Thermal Protection
Automatic-resetting thermal overload protection helps protect the motor against overload conditions.
The D53A/B is intended for clean water of neutral pH. Sand, grit and abrasive material can accelerate pump wear.
Automatic Rainwater and Mains Changeover
The key purpose of the RainBank controller is to make household rainwater reuse automatic.
When usable rainwater is available, RainBank allows the pump to supply the connected rainwater fixtures. When the tank supply is unavailable, the controller provides mains-water backup.
Davey also identifies RainBank as providing mains-water continuity during electrical interruption, helping connected fixtures remain usable even when the rainwater pump cannot run.
This automatic dual-source arrangement is the main reason a RainBank system should not be treated as simply a submersible pump installed in a tank.
Submersible Pump vs Surface-Mounted RainBank
KRBS2 Submersible
The D53A/B pump sits inside the rainwater tank. This keeps the main pump assembly submerged and can provide a cleaner external installation around the tank.
Surface-Mounted RainBank
Systems such as the KRB2 use a pressure pump outside the tank. Surface-mounted models may be preferable where pump access or the existing plumbing arrangement suits an external pump.
The better arrangement depends on the rainwater tank, existing pipework, access, noise considerations and intended water demand.
INSTALLATION REQUIREMENTS
What Is Required to Install the Davey KRBS2?
Suitable rainwater tank and accessible tank opening
Correct positioning of the D53A/B submersible pump
Freedom for the pump float switch to rise and fall
Suitable pump retrieval method without lifting by the electrical lead
Rainwater pipework sized for the required flow and pressure
Suitable mains-water connection for RainBank backup
Correct isolation valves
Required backflow protection
Suitable electrical supply
RainBank controller installed in an accessible supported position
Correct pump lead length for tank depth and controller location
Commissioning of rainwater and mains changeover operation
Standard 10m Lead vs KRBS2/20
The standard D53A/B pump supplied with the KRBS2 uses an approximately 10 metre power lead.
Davey also offers the KRBS2/20, which uses the corresponding D53A/B20 pump with a 20 metre lead.
This can matter where the tank is deeper, the electrical connection is further away or the controller and accessible power location require a longer lead route.
The correct lead version should be selected before installation rather than extending or modifying submersible electrical leads unnecessarily on site.
What's Included With Davey KRBS2 Installation?
Standard Replacement
Where the property qualifies for the selected JR package, installation can include supply of the genuine KRBS2 package, removal of the existing pump system where included and installation into suitable existing services.
Controller & Pump Setup
The D53A/B pump, float operation, RainBank controller, rainwater supply and mains backup are connected and tested as part of commissioning.
Possible Additional Work
Pipework changes, valve replacement, backflow upgrades, electrical work, difficult tank access, new pump retrieval arrangements or changes to the rainwater/mains layout can increase the scope.
How Much Does Davey KRBS2 Installation Cost?
Current supplied-and-installed pricing is shown through JR's live product and installation selector.
The final Davey KRBS2 installation cost depends on whether the job is a genuine like-for-like RainBank replacement or requires changes to pipework, backflow protection, electrical supply, controller position, pump lead arrangement or the rainwater/mains connection layout.
Tank access can also materially affect the installation because the D53A/B pump weighs approximately 16.5kg before pipework and fittings are considered.
A straightforward KRBS2 replacement in an existing compliant setup is generally simpler than converting a basic pump-only rainwater system into a complete automatic RainBank installation.
BRISBANE INSTALLATION
Davey KRBS2 RainBank Installation Brisbane
JR Gas & Water installs the Davey KRBS2 RainBank in Brisbane for suitable rainwater-system replacements and new automatic rainwater harvesting installations.
For Brisbane homes, JR checks the rainwater tank, pump access, intended fixtures, pipe sizing, mains-water backup arrangement, electrical supply and required pressure before confirming whether the KRBS2 is the appropriate model.
The stronger D53A/B pump can be particularly useful where the home has a double-storey layout or longer pipe runs that would place greater pressure demands on a lighter RainBank system.
Eligible service coverage extends across Greater Brisbane and surrounding areas including Logan, Ipswich, Redlands and Moreton Bay.
GOLD COAST INSTALLATION
Davey KRBS2 RainBank Installation Gold Coast
JR Gas & Water also installs the Davey KRBS2 RainBank on the Gold Coast across eligible service areas.
Properties using stored rainwater for toilets, laundry and outdoor fixtures can benefit from automatic mains backup when the tank becomes unavailable.
JR assesses tank access, expected flow and pressure, mains-water arrangement, backflow protection, electrical supply and the existing rainwater plumbing before confirming the final installation scope.
This helps ensure the pump is selected for the actual property rather than simply choosing the largest RainBank model by default.
Can the Davey KRBS2 Replace My Existing Rainwater System?
Replacing Another KRBS2
This can be the most straightforward pathway where the controller, pump access, pipework and electrical layout remain suitable.
Replacing a KRBS1
Moving to KRBS2 provides greater pressure and flow but the increased pump performance and physical pump size should be checked against the existing tank and pipework.
Replacing a Surface Pump
Converting from a surface-mounted pump to an in-tank D53A/B can require changes to pipework, power-lead routing and pump retrieval arrangements.
Replacing a Basic Tank Pump
Adding RainBank automatic mains backup may require changes to mains plumbing, backflow protection and controller wiring.
New Rainwater Installation
A new system needs to be designed around the tank, fixtures, mains backup, pipe sizing, backflow protection and electrical supply.
Longer Pump Lead Required
The KRBS2/20 can be considered where the standard 10m pump lead does not suit the tank and controller location.
Davey RainBank Submersible Range Comparison
| System | Pump | Flow at 200kPa | Davey Positioning |
|---|---|---|---|
| KRBSA1 | D23A/B | 10 L/min | Light demand / limited outlets |
| KRBS1 | D42A/B | 40 L/min | Typical single-storey domestic use |
| KRBS2 | D53A/B | 63 L/min | Higher pressure, higher flow and double-storey applications |
For a home that does not need the D53A/B's stronger pressure capability, a smaller RainBank system may provide a more appropriately matched solution.
COMMON QUESTIONS
Davey KRBS2 RainBank Installation FAQs
What pump does the Davey KRBS2 use?
The KRBS2 uses the Davey D53A/B high-pressure submersible pump.
How much water can the KRBS2 deliver?
Davey rates the complete KRBS2 system at approximately 63 L/min at 200kPa.
What is the maximum flow of the D53A/B pump?
The D53A/B itself can deliver up to approximately 130 L/min under low-head conditions. This is not the same as the normal 63 L/min at 200kPa system rating.
What is the maximum head of the D53A/B?
Davey publishes a maximum total head of approximately 45 metres.
Is the KRBS2 suitable for a double-storey home?
Yes. Davey specifically positions the KRBS2 as its higher-pressure, higher-flow submersible RainBank option for applications including double-storey homes and more demanding pipe runs.
Does the KRBS2 automatically switch to mains water?
Yes. RainBank is designed to prioritise rainwater and automatically provide mains-water backup when tank water is unavailable.
Does the pump sit inside the rainwater tank?
Yes. The D53A/B is a fully submersible pump designed to operate inside the tank.
What power supply does the pump require?
The D53A/B uses 220–240V, 50Hz single-phase power and has a published running current of approximately 5.7A.
What is the pump power?
Davey publishes approximately 1.31kW input power and 0.84kW motor output for the D53A/B.
How deep can the D53A/B be submerged?
Davey publishes maximum submergence of approximately 12 metres.
What lead length comes with the KRBS2?
The standard D53A/B uses an approximately 10m lead. The KRBS2/20 version uses a corresponding 20m-lead pump.
Can the KRBS2 supply toilets and laundry?
RainBank systems are commonly used for approved rainwater fixtures such as toilets, washing-machine cold-water supply and selected outdoor taps. The final arrangement must suit the property and applicable plumbing requirements.
Can the KRBS2 replace a surface-mounted rainwater pump?
Potentially, yes. Converting to an in-tank pump may require pipework, electrical and pump-access changes, so it should be assessed as more than a simple pump swap.
Can the pump be lifted out using the electrical cable?
No. Davey specifically instructs installers to use a suitable rope or retrieval method rather than raising or lowering the D53A/B by its electrical lead.
What water can the D53A/B pump?
Davey specifies clean water of neutral pH. Abrasive sand, grit and hard solids can accelerate pump wear.
What warranty does the KRBS2 have?
Davey's current RainBank-with-submersible-pumps product page lists a 36-month warranty period, subject to the manufacturer's complete warranty conditions.
How much does Davey KRBS2 installation cost?
Use JR's live product and installation selector for current supplied-and-installed pricing. Final cost depends on tank access, plumbing, electrical supply, controller position, backflow protection and whether the job is genuinely like-for-like.
Can JR install the Davey KRBS2 in Brisbane or the Gold Coast?
Yes. JR installs suitable rainwater pump and RainBank systems across eligible Brisbane, Gold Coast and surrounding South East Queensland service areas.
Davey KRBS2 Warranty
RainBank Package
Davey's current RainBank with Submersible Pumps product page publishes a 36-month warranty period.
D53A/B Pump
The D53A/B forms part of Davey's established high-pressure submersible pump range. Warranty treatment should follow the complete warranty terms applicable to the supplied KRBS2 package.
Installation Conditions Matter
Correct tank installation, electrical connection, water quality and pump operation remain important to manufacturer warranty eligibility.
Manufacturer warranty and JR installation warranty are separate. The actual Davey warranty statement supplied with the product should be used when determining manufacturer claim coverage.
Claims Strengthened or Cleaned Up From the Existing KRBS2 Copy
Added exact D53A/B pump identification
Added verified 63 L/min at 200kPa KRBS2 system rating
Added Davey's higher-pressure and higher-flow positioning
Added double-storey-home manufacturer positioning
Added verified 130 L/min maximum pump flow
Added verified 45m maximum pump head
Added 1.31kW input and 0.84kW motor-output specifications
Added 5.7A running-current specification
Added IPX8 and 12m maximum-submergence specifications
Added standard 10m and KRBS2/20 20m lead options
Added clean-water and float-switch installation requirements
Added current 36-month published RainBank warranty
Removed vague claims that cheaper alternatives are inherently unreliable
Replaced generic “stronger performance” wording with manufacturer flow and pressure data
Why Choose JR Gas & Water for Davey RainBank Installation?
JR Gas & Water supplies and installs rainwater pump systems across Brisbane, the Gold Coast and eligible surrounding South East Queensland service areas.
A RainBank installation depends on more than pump selection. Tank access, pipe sizing, mains-water backup, backflow protection, electrical supply and the pressure required at connected fixtures all affect the final result.
JR assesses the existing rainwater system and property conditions before confirming whether KRBS2, a smaller RainBank system or another pump arrangement is the best fit.
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READY TO INSTALL
Install the Davey KRBS2 With JR Gas & Water
The Davey KRBS2 RainBank combines automatic rainwater-to-mains changeover with the stronger D53A/B submersible pump, delivering approximately 63 L/min at 200kPa for suitable higher-demand domestic rainwater systems.
Its strongest fit is properties wanting an in-tank pump, dependable mains backup and greater flow or pressure than Davey's lighter submersible RainBank options provide.
JR Gas & Water supplies and installs suitable Davey KRBS2 systems across eligible Brisbane and Gold Coast service areas. Choose the applicable live installation package above, or use JR's quote pathway where the job involves difficult tank access, pipework changes, backflow upgrades, electrical alterations or conversion from another rainwater-system layout.