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    • Popular Manufacturers
      • TDS
      • NDS
      • POLYCAST®
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      • All Manufacturers
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      • All Drainage Systems
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      • All Drainage Systems
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  • ULMA D100 w/Bronze Age™ CATHEDRAL Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ CATHEDRAL Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ CATHEDRAL Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • ULMA D100 w/Bronze Age™ FERN Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ FERN Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ FERN Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • ULMA D100 w/Bronze Age™ LUNA Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ LUNA Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ LUNA Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • ULMA D100_462G Gatic Grate

    ULMA D100 Drain Channel w/ TDS 462G Slotted Ductile Iron Grate - Class D

    ULMA D100 Drain Channel w/ TDS 462G Slotted Ductile Iron Grate - Class D

    Regular price From $330.71 USD
    Regular price Sale price From $330.71 USD
    Unit price /  per 
  • New Image Coming Soon

    ULMA D100 Drain Channel w/402 Mesh Galvanized Grate - Class B

    ULMA D100 Drain Channel w/402 Mesh Galvanized Grate - Class B

    Regular price From $337.69 USD
    Regular price Sale price From $337.69 USD
    Unit price /  per 
  • ULMA D100 with 410 perforated stainless steel grate

    ULMA D100 Drain Channel w/410 Perforated w/Tread Galvanized Grate - Class A

    ULMA D100 Drain Channel w/410 Perforated w/Tread Galvanized Grate - Class A

    Regular price From $261.36 USD
    Regular price Sale price From $261.36 USD
    Unit price /  per 
  • ULMA D100-460

    ULMA D100 Drain Channel w/460 Slotted Ductile Iron Grate - Class C

    ULMA D100 Drain Channel w/460 Slotted Ductile Iron Grate - Class C

    Regular price From $320.70 USD
    Regular price Sale price From $320.70 USD
    Unit price /  per 
  • ULMA D100 Channel

    ULMA D100 Drain Channel w/ TDS 424 Slotted Reinforced Galvanized Grate - Class C

    ULMA D100 Drain Channel w/ TDS 424 Slotted Reinforced Galvanized Grate - Class C

    Regular price From $314.27 USD
    Regular price Sale price From $314.27 USD
    Unit price /  per 
  • ULMA D100_0.9 Vinyl Ester FRP 486 Grate

    ULMA D100 Drain Channel w/486 Slotted Fiberglass Grate - Class B

    ULMA D100 Drain Channel w/486 Slotted Fiberglass Grate - Class B

    Regular price From $564.72 USD
    Regular price Sale price From $564.72 USD
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  • New Image Coming Soon

    ULMA D100 Drain Channel w/406 Mesh HP Galvanized Grate - Class B

    ULMA D100 Drain Channel w/406 Mesh HP Galvanized Grate - Class B

    Regular price From $387.65 USD
    Regular price Sale price From $387.65 USD
    Unit price /  per 
  • ULMA D100-461

    ULMA D100 Drain Channel w/461D Slotted Ductile Iron Grate - Class E

    ULMA D100 Drain Channel w/461D Slotted Ductile Iron Grate - Class E

    Regular price From $340.52 USD
    Regular price Sale price From $340.52 USD
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  • New Image Coming Soon

    ULMA D100 Drain Channel w/465 Slotted Ductile Iron Grate - Class B

    ULMA D100 Drain Channel w/465 Slotted Ductile Iron Grate - Class B

    Regular price From $309.92 USD
    Regular price Sale price From $309.92 USD
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  • ULMA D100-495

    ULMA D100 Drain Channel w/495 Gray Slotted Plastic Grate - Class A

    ULMA D100 Drain Channel w/495 Gray Slotted Plastic Grate - Class A

    Regular price From $309.00 USD
    Regular price Sale price From $309.00 USD
    Unit price /  per 
  • ULMA D100 with steel slotted 420 grates

    ULMA D100 Drain Channel w/420 Slotted Galvanized Grate - Class A

    ULMA D100 Drain Channel w/420 Slotted Galvanized Grate - Class A

    Regular price From $273.37 USD
    Regular price Sale price From $273.37 USD
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  • ULMA D100_0.6 Vinyl Ester FRP 488 Grate

    ULMA D100 Drain Channel w/488 Slotted Fiberglass Grate - Class C

    ULMA D100 Drain Channel w/488 Slotted Fiberglass Grate - Class C

    Regular price From $615.33 USD
    Regular price Sale price From $615.33 USD
    Unit price /  per 
  • New Image Coming Soon

    ULMA D100 Drain Channel w/497 Black Mesh Plastic Grate - Class B

    ULMA D100 Drain Channel w/497 Black Mesh Plastic Grate - Class B

    Regular price From $324.68 USD
    Regular price Sale price From $324.68 USD
    Unit price /  per 
  • ULMA D100-494

    ULMA D100 Drain Channel w/494 Slotted Plastic Grate - Class A

    ULMA D100 Drain Channel w/494 Slotted Plastic Grate - Class A

    Regular price From $301.12 USD
    Regular price Sale price From $301.12 USD
    Unit price /  per 
  • D100-BA-BARS-0520

    ULMA D100 w/Bronze Age™ BARS Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ BARS Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • D100-BA-PED-0520

    ULMA D100 w/Bronze Age™ PEDREDA Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ PEDREDA Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • New Image Coming Soon

    ULMA D100 w/Bronze Age™ WAVE Ductile Iron Grate - RAW

    ULMA D100 w/Bronze Age™ WAVE Ductile Iron Grate - RAW

    Regular price From $421.92 USD
    Regular price Sale price From $421.92 USD
    Unit price /  per 
  • LD100X-5 locking device

    LD100X-5 Locking Device for ULMA Grates

    LD100X-5 Locking Device for ULMA Grates

    Regular price $46.13 USD
    Regular price Sale price $46.13 USD
    Unit price /  per 
  • ID100 Installation Device ULMA

    ULMA ID100 Installation Chair

    ULMA ID100 Installation Chair

    Regular price $22.13 USD
    Regular price Sale price $22.13 USD
    Unit price /  per 
  • 497 PE100KCBM_ADA Mesh Polypropylene Grate

    ULMA 497 / PE100KCBM Class B ADA Compliant Mesh HDPE 123mm x 500mm Grate

    ULMA 497 / PE100KCBM Class B ADA Compliant Mesh HDPE 123mm x 500mm Grate

    Regular price $43.83 USD
    Regular price Sale price $43.83 USD
    Unit price /  per 
  • 410 GP100KCA new perforated galv. steel with tread grate

    ULMA 410 Class A Perforated w/Tread Galvanized Steel 122mm x 1M Grate

    ULMA 410 Class A Perforated w/Tread Galvanized Steel 122mm x 1M Grate

    Regular price $24.80 USD
    Regular price Sale price $24.80 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 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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