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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
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      • Fiberglass
      • Plastic
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      • Pour in Place (Concrete)
      • All Channel Materials
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      • All Load Classes
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    • Popular Manufacturers
      • TDS
      • Bronze Age
      • NDS
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      • Polylok
      • ULMA
      • 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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      • Galvanized Steel
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  • ULMA LD100X-3 Drawing

    LD100X-3 Locking Device for ULMA Grates

    LD100X-3 Locking Device for ULMA Grates

    Regular price $17.55 USD
    Regular price Sale price $17.55 USD
    Unit price /  per 
  • aluminum grates

    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

    Regular price $80.36 USD
    Regular price Sale price $80.36 USD
    Unit price /  per 
  • 454 IN100KCC Reinforced Stainless Steel Slotted

    ULMA 455 / IN100KCCM Reinforced Stainless Steel Slotted Grate 0.5M Class C

    ULMA 455 / IN100KCCM Reinforced Stainless Steel Slotted Grate 0.5M Class C

    Regular price $232.88 USD
    Regular price Sale price $232.88 USD
    Unit price /  per 
  • aluminum grates

    ULMA 425 / GN100KCCM Class C Slotted Reinforced Galvanized Steel 122mm x 500mm Grate

    ULMA 425 / GN100KCCM Class C Slotted Reinforced Galvanized Steel 122mm x 500mm Grate

    Regular price $51.16 USD
    Regular price Sale price $51.16 USD
    Unit price /  per 
  • ULMA 406_407 GEHX100KCB-Mesh Heelproof Galvanized grate

    ULMA 406 / GEHX100KCB Mesh Heelproof Galvanized Grate 1M Class B

    ULMA 406 / GEHX100KCB Mesh Heelproof Galvanized Grate 1M Class B

    Regular price $150.62 USD
    Regular price Sale price $150.62 USD
    Unit price /  per 
  • 420 ULMA slotted galvanized steel grate

    ULMA 421 / GN100KCAM Class A Slotted Galvanized Steel 122mm x 500mm Grate

    ULMA 421 / GN100KCAM Class A Slotted Galvanized Steel 122mm x 500mm Grate

    Regular price $27.49 USD
    Regular price Sale price $27.49 USD
    Unit price /  per 
  • ULMA 402_403 GEX100KCB-Mesh Galvanized grate

    ULMA 402 / GEX100KCB Mesh Galvanized Grate 1M Class B

    ULMA 402 / GEX100KCB Mesh Galvanized Grate 1M Class B

    Regular price $100.67 USD
    Regular price Sale price $100.67 USD
    Unit price /  per 
  • LD100X-1 ULMA Locking device for galvanized mesh grates

    LD100X-1 Locking Device for ULMA Grates

    LD100X-1 Locking Device for ULMA Grates

    Regular price $12.60 USD
    Regular price Sale price $12.60 USD
    Unit price /  per 
  • BA-PED-0520

    Bronze Age™ BA-PED-0520 Ductile Iron 5" x 20" Grate - RAW

    Bronze Age™ BA-PED-0520 Ductile Iron 5" x 20" Grate - RAW

    Regular price $87.50 USD
    Regular price Sale price $87.50 USD
    Unit price /  per 
  • ULMA 438 Grate - Stainless Steel Wedge Wire

    ULMA 438 Wedge Wire Reinforced 316L Stainless Steel 122mm x 1M Grate ADA Compliant | Class C

    ULMA 438 Wedge Wire Reinforced 316L Stainless Steel 122mm x 1M Grate ADA Compliant | Class C

    Regular price $604.80 USD
    Regular price Sale price $604.80 USD
    Unit price /  per 
  • 5inch-cast-iron-que-hp-bk

    Iron Age IA-QUE-0520-HP-BF Class B Heel-Proof Cast Iron 122mm x 500mm Grate - BoOF

    Iron Age IA-QUE-0520-HP-BF Class B Heel-Proof Cast Iron 122mm x 500mm Grate - BoOF

    Regular price $223.08 USD
    Regular price Sale price $223.08 USD
    Unit price /  per 
  • ULMA 450 IN100KCA-Stainless Steel Slotted Grate

    ULMA 450 / IN100KCA Stainless Steel Slotted Grate 1M Load Class A

    ULMA 450 / IN100KCA Stainless Steel Slotted Grate 1M Load Class A

    Regular price $121.65 USD
    Regular price Sale price $121.65 USD
    Unit price /  per 
  • 480 FNHX100KCCM ductile iron heel-proof wave grate

    ULMA 480 Class C Wave Iron Heel-Proof Ductile Iron 122mm x 500mm Grate

    ULMA 480 Class C Wave Iron Heel-Proof Ductile Iron 122mm x 500mm Grate

    Regular price $48.91 USD
    Regular price Sale price $48.91 USD
    Unit price /  per 
  • Bronze Age™ BA-FERN-0520 Ductile Iron 5" x 20" Grate - RAW

    Bronze Age™ BA-FERN-0520 Ductile Iron 5" x 20" Grate - RAW

    Bronze Age™ BA-FERN-0520 Ductile Iron 5" x 20" Grate - RAW

    Regular price $87.50 USD
    Regular price Sale price $87.50 USD
    Unit price /  per 
  • ULMA Stainless Steel Mesh Grate IEX100KCB 432_IEX100KCBM 433

    ULMA IEX100KCBM / 433 Class B Mesh Stainless Steel 124mm x 0.5M Grate

    ULMA IEX100KCBM / 433 Class B Mesh Stainless Steel 124mm x 0.5M Grate

    Regular price $317.39 USD
    Regular price Sale price $317.39 USD
    Unit price /  per 
  • 460 FNX100KCCM ULMA ductile iron grate

    ULMA 460 / FNX100KCCM Slotted Ductile Iron 124mm x 498mm Grate Class C

    ULMA 460 / FNX100KCCM Slotted Ductile Iron 124mm x 498mm Grate Class C

    Regular price $36.89 USD
    Regular price Sale price $36.89 USD
    Unit price /  per 
  • 5inch-cast-iron-grate-Minione-boof

    Iron Age IA-MIN-0520-BF Class B Minnione Cast Iron 122mm x 500mm Grate - BoOF

    Iron Age IA-MIN-0520-BF Class B Minnione Cast Iron 122mm x 500mm Grate - BoOF

    Regular price $223.08 USD
    Regular price Sale price $223.08 USD
    Unit price /  per 
  • Vinylester-489-FRP-0.6-in-on-center-0.5M-length-510x510

    TDS 489 Vinyl-Ester Fiberglass Bar 122mm x 0.5M Bar Grate - 0.6" on center - Class C

    TDS 489 Vinyl-Ester Fiberglass Bar 122mm x 0.5M Bar Grate - 0.6" on center - Class C

    Regular price $124.70 USD
    Regular price Sale price $124.70 USD
    Unit price /  per 
  • 454 IN100KCC Reinforced SS Slotted

    ULMA 454 / IN100KCC Reinforced Stainless Steel Slotted Grate 1M Class C

    ULMA 454 / IN100KCC Reinforced Stainless Steel Slotted Grate 1M Class C

    Regular price $372.71 USD
    Regular price Sale price $372.71 USD
    Unit price /  per 
  • IA-ARGO-0520-BF BoOF cast iron decorative grate

    Iron Age IA-ARGO-0520-HP-BF AA5-20I21HP Class B Argo ADA/HP Cast Iron 122mmx500mm BoOF

    Iron Age IA-ARGO-0520-HP-BF AA5-20I21HP Class B Argo ADA/HP Cast Iron 122mmx500mm BoOF

    Regular price $223.08 USD
    Regular price Sale price $223.08 USD
    Unit price /  per 
  • Gatic Cast Iron Slotted Grate - Top View

    TDS 462G Class D Slotted Ductile Iron Grate

    TDS 462G Class D Slotted Ductile Iron Grate

    Regular price $46.49 USD
    Regular price Sale price $46.49 USD
    Unit price /  per 
  • Vinylester-487-FRP-0.9-in-on-center-0.5M-length-510x510

    TDS 487 Class B Vinyl-Ester Fiberglass Bar 122mm x 0.5M Bar Grate - 0.9" centers

    TDS 487 Class B Vinyl-Ester Fiberglass Bar 122mm x 0.5M Bar Grate - 0.9" centers

    Regular price $95.70 USD
    Regular price Sale price $95.70 USD
    Unit price /  per 
  • 5inch-cast-iron-grate-Minione-raw

    Iron Age IA-MIN-0520 Class B Minnione Cast Iron 122mm x 500mm Grate - RAW

    Iron Age IA-MIN-0520 Class B Minnione Cast Iron 122mm x 500mm Grate - RAW

    Regular price $167.31 USD
    Regular price Sale price $167.31 USD
    Unit price /  per 
  • IA-JOE-0520-HP-BF Iron Age Regular Joe Heel Proof 4.8x19.6 grate - BoOF

    Iron Age IA-JOE-0520-HP-BF Class B HP Regular Joe Cast Iron 5x20 (Nominal) Grate - BoOF

    Iron Age IA-JOE-0520-HP-BF Class B HP Regular Joe Cast Iron 5x20 (Nominal) Grate - BoOF

    Regular price $223.08 USD
    Regular price Sale price $223.08 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 HYDROPLUS Mini w/ BARS Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ BARS Ductile Iron Grate Class C

    $237.16 $183.00
  • ULMA HYDROPLUS Mini w/ FERN Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ FERN Ductile Iron Grate Class C

    $237.16 $183.00
  • ULMA HYDROPLUS Mini w/ CATHEDRAL Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ CATHEDRAL Ductile Iron Grate Class C

    $237.16 $183.00
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