Hydro-Shield® Advance

Handle larger flows with compact structures using adaptable treatment module heights designed to fit diverse site conditions. Backed by NJCAT 2021 protocol approval, this is the first hydrodynamic separator certified by NJDEP for alternative inlet pipe angles.

Additionally, Hydro-Shield Advance has received NJCAT Verification for 80% coarse sediment removal using OK-110 equivalent gradation, giving engineers and regulators independently validated performance data they can trust.

Design your stormwater separator quickly and easily online. Optimize the system to meet your site-specific requirements, and get technical information, drawings and documentation to support planning, specification and approval.

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Overview

Advanced Hydrodynamic Separator

Hydro-Shield® Advance is a cutting-edge hydrodynamic separator designed to capture stormwater pollutants at the industry's highest verified flow rates, with NJCAT 2021 protocol approval.

Engineered for flexibility, it adapts to shallow, restricted conditions and accommodates large pipe diameters—up to 18” for a 4’ unit and 24” for a 6’ unit. With multiple diameters and depth profiles, it delivers high-performance treatment in compact spaces, reducing installation costs and meeting regulatory requirements.

Optimized for superior removal of total suspended solids (TSS) and other pollutants, Hydro-Shield® Advance combines proven engineering with an intuitive online design tool for quick site-specific configuration.

Backed by 40+ years of expertise, it’s crafted by the creators of Downstream Defender® and First Defense®.

Hydro-Shield® Advance is now NJDEP certified for alternative inlet pipe angles, the first and only hydrodynamic separator to achieve this approval. This allows for direct connections that previously required junction structures resulting in smaller footprints, simplified layouts, and reduced installation costs—while still meeting stormwater performance standards. Want to learn more? Request a Lunch & Learn.

Features & Benefits

High performance, easy maintenance

Unmatched Stormwater Treatment Performance

  • Achieve market-leading treatment flow rates, certified under NJCAT 2021 protocol (53.4 gpm/sf).
  • Remove pollutants like Total Suspended Solids (TSS) with advanced lamella plate technology for exceptional hydrodynamic separation efficiency.

Flexible Designs for Any Site Condition

  • Customize with three module heights (Shallow, Standard, Plus) to meet specific site requirements.
  • Handle larger flows with ease—compatible with pipe diameters of up to 18” (4’ unit), 24” (6’ unit), and 30″ (8′ unit).
  • Compact outlet modules with integrated peak flow bypass fit small footprints and restricted spaces.

Variable Pipe Angles

Hydro-Shield® Advance is the first and only hydrodynamic separator ever approved by NJDEP for adjustable pipe angles. This means municipalities can adopt it knowing they are approving a proven, regulator-verified innovation that reduces infrastructure needs and improves long-term performance.

  • No more junction manholes required just to accommodate pipe direction changes.
  • Smaller footprints that reduce site constraints and installation costs.
  • Design flexibility without sacrificing performance or compliance.

Cost-Saving Solutions for Contractors and Engineers

  • High flow rates reduce the need for multiple treatment units, saving time and money on installation.
  • Adaptable depths can eliminate expensive excavation or blasting in shallow or constrained sites.

Streamlined Design with Powerful Tools

  • Simplify project planning with our online design tool—input site-specific details, flow rates, and get instant specifier drawings.
  • Designed for ease, so you can configure treatment systems quickly and efficiently.

Backed by Decades of Engineering Excellence

  • Built on 40+ years of hydrodynamic separator design expertise, developed by the same experts behind Downstream Defender® and First Defense®.
  • Trusted by engineers and contractors nationwide for reliable and compliant stormwater management solutions.
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Specs & Downloads

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