Rain Guardian Bunker


The Rain Guardian Bunker is a compact, durable, and cost-effective pretreatment chamber designed to capture sediment, debris, and floatables before stormwater enters bioretention systems. Constructed from recycled HDPE plastic, it is ideal for residential and light commercial applications.

Features:

  • Made from 95%+ recycled HDPE plastic lumber
  • Compact footprint: 50″ L x 25.5″ W x 15.5″ H
  • Lightweight (approx. 35 lbs) for easy handling and maintenance
  • Pedestrian-rated steel grate (316 lb. load capacity)
  • Internal storage capacity: 2.85 cubic feet
  • Inlet flow capacity: up to 3.07 CFS; outlet: up to 6.11 CFS
  • Designed for 12″ ponding depth (9″ version also available)
  • Overflow points prevent bypass before bioretention reaches capacity
  • Drop-in filter and chamber easily cleaned with broom or shovel
  • Installs on a concrete pad (not included)

Benefits:

  • Captures sediment, trash, and organic debris at the source
  • Extends the life and performance of downstream BMPs
  • Simplifies maintenance—no confined space entry required
  • Reduces clogging and maintenance costs in rain gardens
  • Lightweight and easy to install in new or retrofit projects
  • Durable, rot- and corrosion-resistant construction
  • Cost-effective solution for residential-scale bioretention
  • Approved by MSD and used in multiple municipal programs

Applications

  • Rain gardens
  • Bioretention cells
  • Grassed swales
  • Infiltration basins
  • Residential curb inlets
  • Parking lot islands

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Rain Guardian Bunker

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