- +61 (08) 8187 2888
- sales@saxonengineering.com.au
- 23 Heath St, Lonsdale, SA 5160
RPZ Backflow Cages
Secure, Compliant Protection
At Saxon Engineering, we design and manufacture heavy-duty RPZ backflow cages to protect reduced pressure zone (RPZ) backflow prevention devices from vandalism, accidental damage, and unauthorised access. Proudly Australian-made in South Australia, our RPZ cages are built for durability, safe access, and practical compliance across commercial, industrial, and public environments. RPZ backflow devices are critical components in water supply systems and are commonly installed in accessible outdoor or plant areas. A properly designed steel RPZ backflow cage helps protect this essential infrastructure while maintaining the clearances and access required for inspection, testing, and ongoing maintenance.
Why RPZ Backflow Cages Are Important
RPZ backflow prevention devices play a vital role in protecting potable water supplies. When these units are damaged or tampered with, it can result in service disruption, costly repairs, and compliance issues.
Installing a purpose-built RPZ backflow cage helps to:
Protect critical water infrastructure
Reduce the risk of vandalism or unauthorised interference
Improve site safety by restricting access to mechanical services
Protect valves, pipework, and test points
Support authority, council, and asset-owner requirements
Our RPZ cages are designed to provide physical protection without restricting authorised access, ensuring testing and servicing can be carried out safely and efficiently.
Designed for Commercial & Public Environments
Saxon Engineering’s RPZ backflow cages are commonly supplied for:
Commercial buildings and offices
Shopping centres and retail developments
Schools, universities, and childcare centres
Hospitals and healthcare facilities
Industrial sites and warehouses
Councils, utilities, and government facilities
Apartment complexes and strata properties
These environments often require solutions that balance security, durability, and accessibility, which is exactly what our RPZ cages are designed to deliver.
Heavy-Duty Steel Construction
Our RPZ backflow cages are fabricated using robust galvanised steel construction developed through extensive experience in custom plant and security enclosures.
Typical construction features:
Galvanised steel framing using SHS or equal angle sections
Welded galvanised steel mesh infill to all sides and top
Smooth-finished welds and removal of sharp edges for safety
Open mesh design to allow visibility and ventilation
Built for long-term outdoor exposure
Framing sizes and mesh apertures are selected to suit the project specification and authority requirements, providing strength while maintaining airflow and inspection visibility.
Custom RPZ Backflow Cages to Suit Your Site
No two RPZ installations are the same. Pipe layouts, valve orientations, test points, and authority requirements vary significantly between sites. For this reason, Saxon Engineering specialises in custom RPZ backflow cages.
Our cages can be designed to accommodate:
Single or multiple RPZ assemblies
Ground-mounted or wall-mounted installations
Vertical or horizontal pipework configurations
Required clearances for testing and maintenance
Integration with existing services or structures
A range of standard sizes may be suitable for common installations, with custom fabrication available where site conditions require it.
Access, Clearance & Serviceability
Access for licensed testers and maintenance personnel is a key consideration in every RPZ cage design. Our cages are configured to allow:
Clear access to valves and test points
Visibility of the RPZ assembly for inspection
Practical working space within the enclosure
Secure restriction of unauthorised access
Access is typically provided via hinged, padlockable lids or access panels, allowing authorised personnel to safely carry out testing and servicing.
Cages are generally supplied with an open-bottom design, allowing clearance for pipework, drainage, and installation over existing services without obstructing ground conditions.
Finishes to Suit the Environment
RPZ backflow cages are available in a range of finishes to suit exposure conditions and project specifications, including:
Pre-galvanised steel for sheltered or lower-corrosion environments
Hot-dip galvanised steel for exposed or high-corrosion locations
Stainless steel for highly corrosive or specialist applications
Powder-coated finishes for architectural or visually sensitive sites
Finish selection is confirmed based on site location, environmental exposure, and authority requirements.
Flat-Pack & Efficient Supply
Where practical, RPZ backflow cages are supplied flat-packed, with interlocking panels and bolted assembly to reduce freight costs and simplify transport. This approach is particularly beneficial for interstate or regional projects while maintaining structural integrity and security once assembled.
Based in South Australia, Saxon Engineering supplies RPZ backflow cages Australia-wide, with delivery arranged to suit project requirements.
Standard Stock Sizes
FLOOR MOUNTED as standard / WALL MOUNT optional
25mm Mesh
| Itemcode | Width (mm) | Height (mm) | Depth (mm) |
|---|---|---|---|
| 090906/25 | 900 | 900 | 600 |
| 100906/25 | 1000 | 900 | 600 |
| 121006/25 | 1200 | 1000 | 600 |
| 121206/25 | 1200 | 1200 | 600 |
| 121406/25 | 1200 | 1400 | 600 |
| 121606/25 | 1200 | 1600 | 600 |
| 121806/25 | 1200 | 1800 | 600 |
50mm Mesh
| Itemcode | Width (mm) | Height (mm) | Depth (mm) |
|---|---|---|---|
| 090906/50 | 900 | 900 | 600 |
| 100906/50 | 1000 | 900 | 600 |
| 121006/50 | 1200 | 1000 | 600 |
| 121206/50 | 1200 | 1200 | 600 |
| 121406/50 | 1200 | 1400 | 600 |
| 121606/50 | 1200 | 1600 | 600 |
| 121806/50 | 1200 | 1800 | 600 |
Why Choose Saxon Engineering?
Australian-made RPZ backflow cages
Manufactured in South Australia
Heavy-duty galvanised steel construction
Custom designs to suit site-specific installations
Padlockable access and open-bottom designs
Finishes to suit authority and environmental requirements
Trusted by councils, utilities, and facility managers
Technical Specifications
The following outlines typical design and construction features. Final specifications are confirmed prior to fabrication to suit project and authority requirements.
Construction
Galvanised steel framing (SHS or equal angle sections)
Welded galvanised steel mesh infill to sides and top
Smooth-finished welds and removal of sharp edges
Mesh Options
Typical mesh sizes include 50 × 50 or 25 × 25 weldmesh
Mesh selection to suit security, airflow, and authority requirements
Access & Security
Hinged lids or access panels
Provision for padlocking
Designed for authorised testing and maintenance access
Base Configuration
Open-bottom design for pipework clearance and drainage
Fixing & Mounting
Designed for fixing to concrete or structural substrates
Fixed using M10 chemical or mechanical anchors
Fixing method confirmed to suit installation substrate
Finish
Pre-galvanised steel
Hot-dip galvanised steel (optional)
Stainless steel (optional)
Powder-coated finish (optional)
Zinc touch-up recommended to apply where site welding is required
Design & Supply
Supplied flat-packed where practical
Modular panel construction for efficient transport
Australia-wide delivery available
SMALL RPZ SPec
MEDIUM RPZ Spec
LARGE RPZ Spec
(SA Water Size – not SA Water spec)
SA Water SPEC
FAQ
Do AC condenser cages comply with Australian building and safety requirements?
Our AC condenser cages are designed and fabricated to support common Australian building and workplace safety expectations by restricting unauthorised access to mechanical equipment while still allowing ventilation and service access. In practice, compliance depends on the overall site conditions and the specific requirements of your project (including clearances, access paths, and any local authority requirements).
For commercial or public-facing sites, we can design the enclosure to maintain appropriate service clearances, include secure access (lockable panels/doors), and suit safe anchoring to the substrate. If your project has a nominated standard, engineer’s specification, or facility policy, we can work to those requirements during design and quoting so the finished cage aligns with the relevant criteria.
Will an AC condenser cage affect unit performance or efficiency?
A properly designed condenser cage should not reduce performance or efficiency. Our cages use welded mesh panels to maintain airflow around the condenser, and we design the enclosure to provide suitable service and ventilation clearances.
As a general rule, performance issues occur when an enclosure is built too close to the unit or blocks discharge/return airflow. To avoid that, we allow for practical clearances around the plant—particularly at the front access side and on sides where refrigeration and electrical connections are located—and we ensure technicians can still service the unit safely.
If you provide the condenser model, photos, and approximate site measurements, we can tailor the cage so it protects the equipment without compromising airflow or maintenance access.
Can condenser cages be designed to meet government or council specifications?
Yes. Saxon Engineering regularly manufactures condenser cages and plant enclosures that can be configured to meet government, council, education, and commercial project specifications. This can include requirements around:
Mesh type and aperture (security vs airflow balance)
Frame construction (heavy-duty angle frames)
Access arrangements (lockable panels or hinged gates)
Minimum clearances for servicing and connections
Anchoring method and base plates
Finish requirements (pre-galvanised vs hot-dip galvanised)
If you have a project spec, standard drawing, or tender requirement, send it through and we’ll align the cage design to suit. Where the specification references particular clearances or construction details, we can incorporate those into the build and confirm them prior to fabrication.
What finishes are available and which should I choose?
Saxon Engineering offers a range of finishes for AC condenser cages to suit different environments, durability requirements, and aesthetic preferences. The most suitable option depends on the site location, exposure conditions, and project specification.
Pre-galvanised steel
Best suited for:
Sheltered or semi-sheltered locations
Standard commercial and residential installations
Lower-corrosion environments
Cost-effective projects
Pre-galvanised cages provide reliable corrosion protection for many typical installations where exposure to salt air or harsh conditions is limited.
Hot-dip galvanised steel
Best suited for:
Outdoor and fully exposed installations
Coastal or high-corrosion environments
Industrial sites
Government, education, and infrastructure projects
Hot-dip galvanising provides a thicker, more durable zinc coating and is recommended where long service life and minimal maintenance are required. Where any site welding is necessary, appropriate zinc-rich touch-up protection is recommended.
Stainless steel
Best suited for:
Highly corrosive environments
Food processing, healthcare, or specialist facilities
Architectural applications requiring a premium finish
Sites where long-term durability and appearance are critical
Stainless steel condenser cages offer excellent corrosion resistance and a clean, high-quality appearance, making them ideal for demanding or specialised environments.
Powder coated finishes
Best suited for:
Architecturally sensitive locations
Commercial or public-facing sites
Projects requiring colour matching or visual integration
Powder coating can be applied over suitable base materials to achieve a specific colour or aesthetic outcome. This option is often selected where the condenser cage needs to blend with surrounding buildings or meet architectural design requirements.
If you’re unsure which finish is best for your project, our team can recommend the most appropriate option based on the site location, exposure conditions, and intended use.
Can you deliver to Me?
Based in South Australia, Saxon Engineering supplies AC condenser cages Australia-wide, working with builders, mechanical contractors, facility managers, and government clients on projects of all sizes.
Is there anywhere I can see them in person?
We have multiple sizes on display at our facility located at:
23 Heath Street, Lonsdale SA 5160
As this is a working factory site, inspections are available by appointment only. Please call ahead to ensure safe access, and all visitors must wear enclosed shoes when attending.