Oldcastle NSBB
Oldcastle NSBB
Stormwater Treatment Vault for Sediment and Trash Capture
Oldcastle NSBB provides durable, high-capacity pollutant removal for urban and industrial stormwater projects.
The Oldcastle Nutrient Separating Baffle Box® (NSBB) is a self-contained, multi-stage stormwater treatment system engineered for reliable performance and long-term value. At the core of the design is a patented screen that captures and stores debris in a dry state, reducing nutrient leaching and simplifying maintenance.
The triple-chamber layout provides high removal efficiency for Total Suspended Solids (TSS) across a wide range of particle sizes. Patented flow deflectors safeguard treatment performance by preventing sediment scouring during high flow conditions.
NSBB systems are designed for online installation, eliminating the need for diversion structures. By protecting against clogging and failure at each stage, the system ensures consistent pollutant removal and reduced maintenance requirements. Widely recognized as a Best Management Practice (BMP), NSBB has been adopted by developers, engineers, and municipalities across the country for dependable stormwater quality improvement.
Key Benefits of Oldcastle NSBB
- Multi-Stage Treatment: Triple-chamber design enhances TSS removal across particle sizes.
- Patented Screen Technology: Captures and stores debris dry to reduce nutrient release.
- Maintenance-Friendly: Simplifies cleaning with reduced clogging and easier debris removal.
- High-Flow Protection: Patented deflectors prevent scouring during peak events.
- Proven Solution: Recognized as a trusted BMP by municipalities and engineers nationwide.
How It Works
Proven in the field and verified by independent certifications, the Oldcastle NSBB consistently delivers high pollutant removal while adapting to the real-world needs of both new and retrofit projects. By combining strong performance with simplified maintenance and flexible configurations, it provides a dependable solution for sites that must meet water quality regulations without adding long-term operational headaches.
- Suspended Screen Basket: Captures trash and debris above the water line, keeping it dry to prevent decomposition, odors, or nutrient release.
- Triple Sediment Chambers: Settles fine particles step by step, with deflector walls to protect against scour during high flow.
- Full Trash Capture Models: Versions like NSBB-TC and NSBB-TCT with 5mm screens ensure compliance where full trash capture is required.
- Internal Bypass: Safely conveys peak flows without re-suspending or flushing out captured material.
Upstream & Downstream Allies of NSBB
Oldcastle's NSBB system is a powerful tool for stormwater treatment, but its performance is maximized when paired with companion products that manage flow, remove debris, and provide long-term storage. Working together, these systems create a complete treatment train that ensures water quality, reduces maintenance, and extends infrastructure life.
- Rain Guardian: Positioned upstream to capture trash, sediment, and organic debris before they reach NSBB.
- PreTX: Provides pretreatment by removing coarse sediment and floatables, sending cleaner flows into NSBB.
- R-Tank: Placed downstream to store treated water and promote infiltration, reducing peak flows and helping sites meet detention or recharge requirements.
- FocalPoint Biofiltration System: Can be paired downstream or side-by-side to provide advanced filtration and nutrient removal.
- StormCapture: A downstream ally that offers large-scale underground storage and detention for treated water.
Advantages for Your Project
From design flexibility to field-verified results, the Oldcastle NSBB offers more than just basic treatment. Its patented features and practical options translate directly into project benefits, making it easier to achieve compliance while reducing long-term costs. Advantages include:
- Patented dry storage keeps captured material out of the water, preventing nutrient leaching and protecting water quality between storms.
- Flexible model options let you match site needs, from deeper sediment sumps to full trash capture configurations.
- Service is streamlined with clear vacuum access to both the suspended basket and sediment chambers, minimizing maintenance time.
- Engineered safeguards resist scour and wear, extending system life while ensuring reliable, consistent performance.
Practical Uses
Because no two sites face the same stormwater challenges, the Oldcastle NSBB is engineered to adapt. Its versatility allows it to integrate seamlessly into both new and existing infrastructure, offering reliable performance across a wide range of applications.
- Acts as powerful pretreatment, polishing flows before they enter infiltration, filtration, or storage systems.
- Retrofits with ease, sliding into existing stormwater networks without major redesigns.
- Delivers full trash capture, meeting the strict 5mm screen standard for trash control.
- Fits where others cannot, performing in shallow excavations and tight footprints.
- Keeps projects in compliance, reliably reducing TSS, nutrients, and trash to meet regulatory targets.
Performance Features
Beyond flexibility and ease of use, the Oldcastle NSBB delivers measurable results that stand up to regulatory scrutiny. Independent testing and state certifications confirm that its design translates directly into dependable water quality improvements. These proven results are reflected in key performance benchmarks:
- Removes up to 90% of Total Suspended Solids, delivering clear proof of performance that regulators trust.
- Cuts nutrients by nearly 20%, tackling nitrogen and phosphorus before they reach downstream waters.
- Locks in pollutant capture with patented deflectors and multi-chamber settling, keeping contaminants where they belong.
Support Material
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