When it comes to fire safety in the heart of Sydney, there is no room for compromise. In early 2025, Fox Global was engaged to supply a 6” (150mm) Roll Grooved Double Detector Check Valve (DDCV) as part of a fire system upgrade for a major Sydney CBD building.
This wasn’t just any standard replacement — the project required a robust, compliant, and high-quality valve solution that met strict Australian Standards for potable water safety, fire sprinkler system performance, and ongoing leak detection. With decades of experience in supplying valves, fittings, and fire system components to critical projects across Australia, Fox Global was the natural choice.
What is a Double Detector Check Valve?
A Double Detector Check Valve is a specialised backflow prevention device designed for use in fire sprinkler systems connected to a potable water supply.
Its purpose is twofold:
- Prevent Contamination – It protects the drinking water supply from contamination caused by back pressure or back siphonage from the fire system.
- Detect Unauthorised Use – The integrated metered bypass allows for water flow monitoring, detecting leaks or unauthorised water draw-off.
This is particularly important in high-rise buildings, where water pressure changes and system demands can cause risks if not properly managed.
Project Details – Sydney CBD
For this specific project, Fox Global supplied:
- 6” (150mm) Roll Grooved Double Detector Check Valve
- 20mm Metered By-pass Assembly
- Fully compliant with AS 2845 and local water authority requirements.
- Designed for installation on potable water connections feeding fire sprinkler systems.
The roll grooved ends allowed for quick and secure installation, while the high-grade internal components ensured reliable performance for years to come.
Why the 20mm Metered By-pass Matters
The 20mm metered by-pass serves a critical monitoring function. In many fire systems, the sprinkler network remains idle for most of its life — but water still sits in the pipework. Without a metered by-pass, leaks or unauthorised water use could go undetected, leading to reduced fire protection capability and potential damage.
By installing a metered by-pass, building managers can:
- Track even small amounts of water usage in the fire system.
- Detect slow leaks that could cause pressure drops.
- Identify unauthorised water usage events.
Backflow Protection in Fire Systems
Backflow incidents in fire protection systems can introduce rust, scale, stagnant water, and chemical contaminants into the main potable supply. This is not only a regulatory breach but also a major public health concern.
The Double Detector Check Valve works by using two check valves in series. This redundancy ensures that if one check valve fails, the second provides protection, significantly reducing the risk of contamination.
Fox Global’s Role in Fire System Compliance
Fire protection is not just about extinguishing flames — it’s about system readiness, compliance, and safety for all occupants. Our team at Fox Global doesn’t just sell components; we partner with installers, engineers, and facility managers to:
- Specify the right product for the application.
- Supply high-quality components that meet Australian Standards.
- Deliver on time to keep critical projects moving.
For this Sydney CBD project, our team coordinated with the contractor to ensure the DDCV was supplied ready for immediate installation, avoiding costly downtime.
Why Choose Roll Grooved Connections?
The roll grooved ends on this valve were specifically chosen for their speed of installation and secure fit. Compared to flanged or threaded connections, roll grooved joints:
- Allow for quicker assembly in tight spaces.
- Reduce installation labour costs.
- Maintain strong mechanical integrity under pressure.
In a CBD high-rise, where installation time is at a premium, these benefits made roll grooved the ideal choice.
Fox Global’s Valve Range for Fire Protection & Beyond
While this project focused on a Double Detector Check Valve, Fox Global supplies an extensive range of valves for multiple industries, including:
- Gate Valves – For isolation in fire mains and water supply lines.
- Butterfly Valves – Compact and efficient flow control.
- Non-Return Valves – Preventing backflow in various applications.
- Ball Valves – For quick shut-off in water and chemical lines.
- Y-Strainers – Protecting downstream equipment from debris.
Whether you need AS 4087 flanged, BSP threaded, or grooved-end valves, we can supply a complete solution.
Nationwide Supply & Support
Our customers are located everywhere from Sydney CBD to remote mining sites in WA. With strategic stock holdings and express delivery options, Fox Global can get the right valve to your site fast — whether you’re in Sydney, Brisbane, Melbourne, or anywhere in between.
Our Australian-Made Commitment
Where possible, we prioritise Australian-made products. Supporting local manufacturing not only boosts our economy but also ensures that our customers get products built for Australian conditions and compliance standards.
Beyond Valves – Complete System Support
Fox Global’s fire protection offering doesn’t stop at valves. We also supply:
- Hose assemblies for hydrant and sprinkler systems.
- Fittings and adaptors for easy integration.
- Gaskets and sealing solutions for long-term leak-free performance.
Why Fox Global?
We are more than a supplier — we are problem-solvers and project partners.
✅ Australian Owned & Operated – We understand local standards and conditions.
✅ Family Business Values – We care about relationships, not just transactions.
✅ Quality & Compliance – Every product we supply meets or exceeds Australian Standards.
✅ Nationwide Reach – Fast delivery to all major cities and regional areas.
Final Word – We Care
At Fox Global, we know that in industries like fire protection, water management, and industrial infrastructure, failure is not an option. The work we do, and the products we supply, directly impact safety, compliance, and operational reliability.
As a proudly Australian-owned and family-run business, we take every project personally. Whether it’s a single valve for a small upgrade or a full supply package for a major infrastructure build, our focus is on getting it right, every time.
When you choose Fox Global, you’re not just getting parts — you’re getting a partner who cares.
📞 Call us today on 1300 852 795 to discuss your valve requirements.
