Hydro-Shield Advance
Hydro-Shield Advance

Compact Hydrodynamic Separator for Stormwater Pollution
Hydro-Shield Advance delivers efficient removal of fine sediment, oils, and trash in space-limited stormwater applications.
Nexterra's Hydro-Shield Advance is a next-generation hydrodynamic separator delivering the highest verified treatment flow rates in the industry, certified under the NJCAT 2021 protocol. Built to perform under a wide range of site conditions, this compact and flexible system makes installation straightforward while ensuring projects stay compliant with demanding regulations.
Smart Design, Versatile Application
Engineered with modular height options and the capacity to handle large pipe diameters, Hydro-Shield Advance adapts seamlessly to both new developments and retrofit projects. Its advanced lamella plate technology sets it apart, boosting the capture of fine sediment, oils, and other pollutants that threaten water quality.
Backed by Proven Expertise
With more than 40 years of engineering knowledge from the minds behind Downstream Defender and First Defense, Hydro-Shield Advance is built on a legacy of innovation and reliability. It offers contractors and engineers the confidence of consistent performance, cost control, and long-term dependability.
Certified for High Throughput and Durability
Hydro-Shield Advance stands apart as one of the rare hydrodynamic separators certified under the NJCAT 2021 protocol, carrying state approval for 50 percent TSS removal when properly sized and maintained. That independent seal of approval is more than a formality, it proves Hydro-Shield can handle heavy flows while consistently locking down pollutants for the long term.
Optimized for High Flow and Minimal Footprint
Where projects demand both capacity and compactness, Hydro-Shield Advance delivers. Its internal lamella plate module uses tightly spaced plates to accelerate settling, boosting the capture of sediment and floatables even when flows are heavy. A built-in bypass ensures that peak or overflow events are safely managed without disturbing stored material.
Adaptable Configurations for Real-World Constraints
Depth limitations, large diameter pipe inlets, and challenging layouts are no obstacle. Hydro-Shield Advance offers multiple height modules and pipe size compatibility that allow engineers to tailor each installation without oversizing excavation or adding unnecessary treatment units.
Performance Features Worth Highlighting
Every stormwater project demands equipment that can back up its promises with proven performance. Hydro-Shield Advance delivers measurable advantages through its design and certification, giving engineers and owners confidence in long-term results. Its most important performance features include:
- Lamella plate section compresses settling distance for enhanced fine particle removal
- Certified 50 percent TSS removal performance under NJCAT 2021 protocol
- Internal bypass design protects treatment efficiency during high flow events
- Straightforward maintenance with safe vacuum access to sediment and floatables
Designed for Multiple Applications
Meeting today's demanding regulations often requires systems that perform well without taking up excess space. Hydro-Shield Advance is built for that balance, and its versatility makes it a dependable solution across these applications:
- Transportation corridors that need continuous treatment performance along busy routes
- Parking and loading areas where sediment, oils, and debris are constant challenges
- Urban redevelopment projects with limited space and strict compliance requirements
- Industrial facilities seeking durable, high-capacity pollutant reduction
- Municipal stormwater programs that require proven water quality outcomes across diverse sites
Upstream & Downstream Allies of Hydro-Shield Advance
Hydro-Shield Advance works best as part of an integrated stormwater management train. By pairing it with complementary products upstream and downstream, you can maximize protection, efficiency, and long-term performance.
- Rain Guardian – Positioned at the inlet, this pre-treatment unit intercepts trash and coarse sediment before they reach Hydro-Shield Advance, reducing maintenance needs and extending system life.
- PreTX – Provides additional upstream treatment by removing fine sediment and pollutants, ensuring Hydro-Shield Advance can focus on managing flow rates and delivering reliable volume control.
- R-Tank – Installed downstream, it stores and infiltrates treated runoff, giving Hydro-Shield Advance a partner in volume reduction while maintaining water quality.
- StormTank Shield – Enhances sediment capture and protects the performance of Hydro-Shield Advance under higher-load conditions.
- FocalPoint – If nutrient or fine pollutant removal is a priority, pairing Hydro-Shield Advance with FocalPoint ensures a comprehensive treatment train from flow control to advanced filtration.
Installation and Long-Term Reliability
Engineered with durable components and a modular structure, Hydro-Shield Advance provides years of dependable service. Its combination of certification, compact design, and ease of maintenance makes it a trusted solution for engineers, contractors, and municipalities committed to meeting today's stormwater standards while planning for tomorrow's demands.
Support Material
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