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Oldcastle NSBB

Oldcastle NSBB

The Nutrient Separating Baffle Box (NSBB) is an advanced vault treatment system for stormwater runoff.

The Nutrient Separating Baffle Box (NSBB) is a self-contained, multi-stage stormwater treatment system featuring a patented screen that captures and stores debris in a dry state to reduce nutrient leaching and simplify maintenance. Its triple-chamber design delivers high Total Suspended Solids (TSS) removal across a broad range of particle sizes, while patented deflectors prevent sediment scouring during high flows. Designed for online installation without diversion structures, the NSBB protects against clogging and failure at each stage. It is a widely accepted Best Management Practice (BMP) among developers, civil engineers, and municipalities nationwide.

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Jen-Hill Construction offers the best in Water Quality Treatment products. No other company offers a more comprehensive array of products to meet your needs.

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Additional Information

How It Works

  • Filtration: A rectangular screen system is suspended above the static water level. The screen has a storage capacity of several cubic yards and captures gross solids such as trash and debris
  • Hydrodynamic Separation: Separation is facilitated by three settling chambers that work to target smaller sediments and particulate metals
  • Hydrocarbon Absorption: A patented screen system prevents debris loss and nutrient leaching. No need to service after each storm event with dry-state storage

Benefits

  • Retrofits existing watersheds
  • Patented screens maximize storage and prevent debris loss
  • Easy vacuum truck servicing
  • Dry-state storage separates debris and trash from water and sediment
  • Will not go septic between storms
  • Captures thousands of pounds of debris, sediment and nutrients
  • Pretreatment for rainwater harvesting and detention areas
  • Meets requirements for full trash capture TMDL programs
  • Low pick weights: comprised of multiple sections
  • Fast set: pre-installed internal components (optional)
  • Minimal excavation required

EASY TO INSTALL, SIMPLE TO SERVICE

Maintenance

  • Easy maintenance access via top hatches/manholes without the need for confined space entry
  • Hinged screens allow for full vacuum access to the inner basket and lower sediment chambers
  • After cleaning sediment chambers, close and secure bottom screen doors to prevent debris loss