2025 Armtec First Defense® FD-4HC

Information

2025 Armtec First Defense® FD-4HC

The First Defense® High Capacity is an enhanced vortex separator that combines an effective stormwater treatment chamber with an integral peak flow bypass. It efficiently removes total suspended solids (TSS), metals, trash and hydrocarbons from stormwater runoff without washing out previously captured pollutants.

Features may include:

Environmental Protection
  • Treats stormwater to remove sediment, metals, litter and floatables
Versatile
  • Suitable for single or multiple inlet pipes and inlet grates
Quality
  • Proven to prevent pollutant washout at up to 450% of its treatment flow
Ease of Installation
  • Internals delivered to site pre-assembled and ready for installation

Photos

Highlights

  • Cobden, Ontario
  • 2025
  • Armtec
  • First Defense® FD-4HC
  • Available

Specifications

  • 2025
  • Armtec
  • First Defense®
  • FD-4HC
  • Construction
  • Typical TSS Treatment Flow Rates: NJDEP Sump Floor Certified: 42.4 Ls/ 1.50 cfs | 106µm: 53.2 Ls/ 1.88 cfs | Peak Online Flow Rate: 510 Ls/ 18 cfs
  • Diameter: 1.2 mm/ 4 ft | Maximum Pipe Diameter: 610 mm/ 24 in | Minimum Distance from Outlet Invert to Top of Rim: 0.7 - 1.2 m/ 2.3 - 3.9 ft | Standard Distance from Outlet Invert to Sump Floor: 1.15 m / 4.97 ft
  • 723 L/ 191 gal
  • Sediment: 0.5 m3/ 0.7 yd3