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  • Drainage Kits
    • Popular Manufacturers
      • TDS
      • NDS
      • POLYCAST®
      • ULMA
      • Zurn
      • All Manufacturers
    • Popular Drainage Systems
      • Dura Slope
      • Mini Channel
      • Polycast 600/700
      • Slim Channel
      • SS600
      • ULMA U100K(X)
      • All Drainage Systems
    • Channel Materials
      • Fiberglass
      • Plastic
      • Polymer Concrete
      • Stainless Steel
      • Pour in Place (Concrete)
      • All Channel Materials
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      • Load Class A
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      • Load Class E
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      • All Load Classes
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    • Popular Manufacturers
      • TDS
      • Bronze Age
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      • Zurn
      • All Manufacturers
    • Popular Drainage Systems
      • Dura Slope
      • FP1200
      • Mini Channel
      • Polycast 600/700
      • Slim Channel
      • SS600
      • ULMA U100K(X)
      • All Drainage Systems
    • Grate Material
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      • Bronze
      • Ductile/Cast Iron
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Products Blogs
  • NDS 541 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - GREY

    NDS 541 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - GREY

    NDS 541 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - GREY

    Regular price $780.78 USD
    Regular price Sale price $780.78 USD
    Unit price /  per 
  • NDS-671 WHITE Dura Slope Plastic Perforated Grate

    NDS® DS-671 Class B ADA Compliant Perforated Polyolefin 6" x 24" Grate - WHITE

    NDS® DS-671 Class B ADA Compliant Perforated Polyolefin 6" x 24" Grate - WHITE

    Regular price $117.33 USD
    Regular price Sale price $117.33 USD
    Unit price /  per 
  • NDS 900 009

    NDS 999 Class A ADA Compliant Slotted HDPE 9" x 9" Grate - GRAY

    NDS 999 Class A ADA Compliant Slotted HDPE 9" x 9" Grate - GRAY

    Regular price $82.51 USD
    Regular price Sale price $82.51 USD
    Unit price /  per 
  • NDS-253-TDSdrains

    NDS 253 Class B ADA Compliant Wave HDPE 4" x 24" Grate -BLACK

    NDS 253 Class B ADA Compliant Wave HDPE 4" x 24" Grate -BLACK

    Regular price $92.37 USD
    Regular price Sale price $92.37 USD
    Unit price /  per 
  • NDS970-9inch-grate-blk

    NDS 970 Class A ADA Compliant Slotted HDPE 9" x 9" Grate - BLACK

    NDS 970 Class A ADA Compliant Slotted HDPE 9" x 9" Grate - BLACK

    Regular price $46.25 USD
    Regular price Sale price $46.25 USD
    Unit price /  per 
  • DG0655_SS_Wedge Wire_ClassB

    TDS DG0655H Class B ADA Compliant Wedge Wire Stainless Steel 6" x 24" Grate

    TDS DG0655H Class B ADA Compliant Wedge Wire Stainless Steel 6" x 24" Grate

    Regular price $252.46 USD
    Regular price Sale price $252.46 USD
    Unit price /  per 
  • NDS-252-TDSdrains

    NDS 252 Class B ADA Compliant Heel-Proof Botanical HDPE 4" x 24" Grate - BLACK

    NDS 252 Class B ADA Compliant Heel-Proof Botanical HDPE 4" x 24" Grate - BLACK

    Regular price $92.37 USD
    Regular price Sale price $92.37 USD
    Unit price /  per 
  • NDS 1810 Grey HDPE 18" Slotted Catch Basin Grate

    NDS 1810 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - GRAY

    NDS 1810 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - GRAY

    Regular price $410.25 USD
    Regular price Sale price $410.25 USD
    Unit price /  per 
  • NDS 543 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - BLACK

    NDS 543 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - BLACK

    NDS 543 - Box of 16 - Class B ADA Compliant Slotted HDPE 3" x 36" Grate - BLACK

    Regular price $780.78 USD
    Regular price Sale price $780.78 USD
    Unit price /  per 
  • DG0645 Galvanized Steel Solid Cover for POLYCAST

    POLYCAST DG0645H Class A ADA Compliant Galvanized Steel Solid 6" x 24" Cover

    POLYCAST DG0645H Class A ADA Compliant Galvanized Steel Solid 6" x 24" Cover

    Regular price $66.15 USD
    Regular price Sale price $66.15 USD
    Unit price /  per 
  • NDS-Dura-663-TDSdrains black slotted grate

    NDS® DS-663 Class B ADA Compliant Slotted Polyolefin 6" x 24" Grate - BLACK

    NDS® DS-663 Class B ADA Compliant Slotted Polyolefin 6" x 24" Grate - BLACK

    Regular price $111.16 USD
    Regular price Sale price $111.16 USD
    Unit price /  per 
  • NDS 252GY Class B ADA Compliant Botanical HDPE 4" x 24" (Nominal) Grate - GRAY

    NDS 252GY Class B ADA Compliant Botanical HDPE 4" x 24" (Nominal) Grate - GRAY

    NDS 252GY Class B ADA Compliant Botanical HDPE 4" x 24" (Nominal) Grate - GRAY

    Regular price $92.37 USD
    Regular price Sale price $92.37 USD
    Unit price /  per 
  • NDS 1811 NDS 18" Black HDPE Slotted Catch Basin Grate

    NDS 1811 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - BLACK

    NDS 1811 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - BLACK

    Regular price $369.23 USD
    Regular price Sale price $369.23 USD
    Unit price /  per 
  • NDS1812 18" Green HDPE Catch Basin Grate

    NDS 1812 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - GREEN

    NDS 1812 Class B ADA Compliant Slotted HDPE 18" x 18" Grate - GREEN

    Regular price $380.65 USD
    Regular price Sale price $380.65 USD
    Unit price /  per 
  • DG0646 Galvanized Steel perforated grates for POLYCAST

    POLYCAST DG0646 Class A ADA Compliant Perforated Galvanized Steel 6" x 48" Grate

    POLYCAST DG0646 Class A ADA Compliant Perforated Galvanized Steel 6" x 48" Grate

    Regular price $95.18 USD
    Regular price Sale price $95.18 USD
    Unit price /  per 
  • NDS-253S-TDSdrains

    NDS 253S Class B ADA Compliant Wave HDPE 4" x 24" Grate - SAND

    NDS 253S Class B ADA Compliant Wave HDPE 4" x 24" Grate - SAND

    Regular price $92.37 USD
    Regular price Sale price $92.37 USD
    Unit price /  per 
  • NDS1210_Grey_NDS_Catch_Basin_Grate_12x12

    NDS 1210 Class B ADA Compliant Slotted HDPE 12" x 12" Grate - GRAY

    NDS 1210 Class B ADA Compliant Slotted HDPE 12" x 12" Grate - GRAY

    Regular price $116.10 USD
    Regular price Sale price $116.10 USD
    Unit price /  per 
  • NDS 252 - Box of 12 - Class B ADA Compliant Heel-Proof Botanical HDPE 4" x 24" Grate - BLACK

    NDS 252 - Box of 12 - Class B ADA Compliant Heel-Proof Botanical HDPE 4" x 24" Grate - BLACK

    NDS 252 - Box of 12 - Class B ADA Compliant Heel-Proof Botanical HDPE 4" x 24" Grate - BLACK

    Regular price $1,108.43 USD
    Regular price Sale price $1,108.43 USD
    Unit price /  per 
  • NDS-253GR Green wave Spee-D

    NDS 555GR Class B ADA Compliant Wave Polyolefin 3" x 36" Grate - GREEN

    NDS 555GR Class B ADA Compliant Wave Polyolefin 3" x 36" Grate - GREEN

    Regular price $62.16 USD
    Regular price Sale price $62.16 USD
    Unit price /  per 
  • nds542-green-slotted-grate-TDS

    NDS 542 Class B ADA Compliant Heel-Proof HDPE 3" x 36" Grate - GREEN

    NDS 542 Class B ADA Compliant Heel-Proof HDPE 3" x 36" Grate - GREEN

    Regular price $48.80 USD
    Regular price Sale price $48.80 USD
    Unit price /  per 
  • P4-HPP-DK-GRAY ZURN Z884 grate

    Zurn P4-HPP-DK-GRAY Class A ADA Compliant Slotted HDPE 4" x 20" Grate - DARK GRAY

    Zurn P4-HPP-DK-GRAY Class A ADA Compliant Slotted HDPE 4" x 20" Grate - DARK GRAY

    Regular price $65.00 USD
    Regular price Sale price $65.00 USD
    Unit price /  per 
  • NDS 1211 Class B ADA Compliant Slotted HDPE 12" x 12" Grate - BLACK

    NDS 1211 Class B ADA Compliant Slotted HDPE 12" x 12" Grate - BLACK

    NDS 1211 Class B ADA Compliant Slotted HDPE 12" x 12" Grate - BLACK

    Regular price $100.56 USD
    Regular price Sale price $100.56 USD
    Unit price /  per 
  • NDS-252S-TDSdrains

    NDS 252S Class B ADA Compliant Botanical HDPE 4" x 24" Grate - SAND

    NDS 252S Class B ADA Compliant Botanical HDPE 4" x 24" Grate - SAND

    Regular price $92.37 USD
    Regular price Sale price $92.37 USD
    Unit price /  per 
  • NDS-Dura-Slope-DS-670-TDSdrains light gray perforated

    NDS DS-670 Class B ADA Compliant Perforated Polyolefin 6" x 24" Grate - LIGHT GRAY

    NDS DS-670 Class B ADA Compliant Perforated Polyolefin 6" x 24" Grate - LIGHT GRAY

    Regular price $111.16 USD
    Regular price Sale price $111.16 USD
    Unit price /  per 
  • nds541-plastic grey-slotted-grate-TDS

    NDS 541 Class B ADA Compliant Heel-Proof HDPE 3" x 36" Grate - GRAY

    NDS 541 Class B ADA Compliant Heel-Proof HDPE 3" x 36" Grate - GRAY

    Regular price $48.80 USD
    Regular price Sale price $48.80 USD
    Unit price /  per 
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Resources

Shipping / Returns

Determining Your Grate Size

Load Class Chart

Installer Map

Drainage News

  • How Do You Clean Out a Trench Drain Without Damaging It?

    May 27, 2026
  • What is Load Class and Why Is It Important?

    Feb 23, 2024
  • Keeping Livestock Safe – Grate Ideas

    Feb 02, 2024
  • TDS Bronze Age™ Collection

    Oct 31, 2023

On Sale

  • ULMA 420 / GN100KCA, Class A, Slotted Galvanized Steel 122mm x 1M Grate

    ULMA 420 / GN100KCA, Class A, Slotted Galvanized Steel 122mm x 1M Grate

    $37.45
  • ULMA 424 / GN100KCC, Class C, Slotted Reinforced Galvanized Steel 124mm x 1M Grate

    ULMA 424 / GN100KCC, Class C, Slotted Reinforced Galvanized Steel 124mm x 1M Grate

    $89.29
  • LD100X-2 Locking Device for ULMA Grates

    LD100X-2 Locking Device for ULMA Grates

    $14.40
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