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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
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      • Pour in Place (Concrete)
      • All Channel Materials
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      • Load Class A
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      • All Load Classes
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    • Popular Manufacturers
      • TDS
      • Bronze Age
      • NDS
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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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  • aluminum grates

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

    Sale

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

    Regular price $89.29 USD
    Regular price $80.36 USD Sale price $89.29 USD
    Unit price /  per 
    Sale
  • 494 PNH100KCAM black plastic slotted ulma grate

    ULMA 494 / PNH100KCAM Class A ADA/HP Slotted Polypropylene 123mm x 498mm Grate | Black

    Sale

    ULMA 494 / PNH100KCAM Class A ADA/HP Slotted Polypropylene 123mm x 498mm Grate | Black

    Regular price $35.61 USD
    Regular price $32.05 USD Sale price $35.61 USD
    Unit price /  per 
    Sale
  • 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 
  • New Image Coming Soon

    ULMA HYDROPLUS with 414 / GP100KCC Reinforced Galvanized Perforated Grate Class C

    Sale

    ULMA HYDROPLUS with 414 / GP100KCC Reinforced Galvanized Perforated Grate Class C

    Regular price From $179.07 USD
    Regular price $227.60 USD Sale price From $179.07 USD
    Unit price /  per 
    Sale
  • NDS2400-catch-basin-24x24-barebones1-1024x1024

    NDS 2400 Catch Basin 24" x 24" with 2 Openings

    NDS 2400 Catch Basin 24" x 24" with 2 Openings

    Regular price $988.99 USD
    Regular price Sale price $988.99 USD
    Unit price /  per 
  • Hydro Plus with 432 Stainless Steel Mesh Grate Class B

    ULMA HYDROPLUS with 432 / IEX100KCB Stainless Steel Mesh Grate Class B

    Sale

    ULMA HYDROPLUS with 432 / IEX100KCB Stainless Steel Mesh Grate Class B

    Regular price From $449.79 USD
    Regular price $575.68 USD Sale price From $449.79 USD
    Unit price /  per 
    Sale
  • PCK6-DG0622 POLYCAST 600 with Galvanized Foam Perforated

    POLYCAST 600 Series Kit w/ DG0622 Foam Perforated Galvanized Grate | Load Class A

    POLYCAST 600 Series Kit w/ DG0622 Foam Perforated Galvanized Grate | Load Class A

    Regular price From $244.24 USD
    Regular price Sale price From $244.24 USD
    Unit price /  per 
  • ULMA HYDROPLUS MINI with 438 Grate-Stainless Steel Wedge Wire

    ULMA HYDROPLUS Mini w/ ADA Stainless Steel Reinforced Wedge Wire Grate (438)

    Sale

    ULMA HYDROPLUS Mini w/ ADA Stainless Steel Reinforced Wedge Wire Grate (438)

    Regular price From $517.36 USD
    Regular price $658.32 USD Sale price From $517.36 USD
    Unit price /  per 
    Sale
  • 6516 USF cast iron frame - 1 piece

    Heavy Duty Gray Iron USF 6516 Frame Rail 1.5" x 48"

    Heavy Duty Gray Iron USF 6516 Frame Rail 1.5" x 48"

    Regular price $116.06 USD
    Regular price Sale price $116.06 USD
    Unit price /  per 
  • ULMA low profile polymer concrete channel with stainless steel edge and reinforced stainless steel slotted grate

    ULMA M100KX Kit with 454 / IN100KCC Reinforced Stainless Steel Slotted Grate

    Sale

    ULMA M100KX Kit with 454 / IN100KCC Reinforced Stainless Steel Slotted Grate

    Regular price From $535.68 USD
    Regular price $678.74 USD Sale price From $535.68 USD
    Unit price /  per 
    Sale
  • ULMA Hydro Mini Plus H80 with ULMA 420 Galvanized Steel Slotted Grate Class A

    ULMA HYDROPLUS Mini with Galvanized Slotted Grate (420 / GN100KCA) Class A

    Sale

    ULMA HYDROPLUS Mini with Galvanized Slotted Grate (420 / GN100KCA) Class A

    Regular price From $73.18 USD
    Regular price $90.97 USD Sale price From $73.18 USD
    Unit price /  per 
    Sale
  • NDS 555S - Box of 16 - Class B ADA Compliant Wave Polyolefin 3" x 36" Grate - SAND

    NDS 555S - Box of 16 - Class B ADA Compliant Wave Polyolefin 3" x 36" Grate - SAND

    NDS 555S - Box of 16 - Class B ADA Compliant Wave Polyolefin 3" x 36" Grate - SAND

    Regular price $994.56 USD
    Regular price Sale price $994.56 USD
    Unit price /  per 
  • DS 232

    NDS® DS-232 Class D ADA-Compliant Slotted Ductile Iron 6" x 24" Grate

    NDS® DS-232 Class D ADA-Compliant Slotted Ductile Iron 6" x 24" Grate

    Regular price $158.01 USD
    Regular price Sale price $158.01 USD
    Unit price /  per 
  • POLY600-XX-675

    POLYCAST® 600 Vinyl Ester Series Kit w/ DG0675 Transverse Slotted HDPE Grate

    POLYCAST® 600 Vinyl Ester Series Kit w/ DG0675 Transverse Slotted HDPE Grate

    Regular price From $315.12 USD
    Regular price Sale price From $315.12 USD
    Unit price /  per 
  • Polycast 600 with Vinyl Ester Polymer channels and DG0655R Reinforced Wedge wire grates

    POLYCAST® 600 Vinyl Ester Series Kit with DG0655R Reinforced Stainless Wedge Wire Grate

    POLYCAST® 600 Vinyl Ester Series Kit with DG0655R Reinforced Stainless Wedge Wire Grate

    Regular price From $609.79 USD
    Regular price Sale price From $609.79 USD
    Unit price /  per 
  • J-4223-01 Heavy Duty Cast Iron 14" x 24" x 1.5" Grate | D&L Foundry

    J-4223-01 Heavy Duty Cast Iron 14" x 24" x 1.5" Grate | D&L Foundry

    J-4223-01 Heavy Duty Cast Iron 14" x 24" x 1.5" Grate | D&L Foundry

    Regular price $251.52 USD
    Regular price Sale price $251.52 USD
    Unit price /  per 
  • POLYCAST 600 with DG0644SP Fiberglass FRP Bar Grate

    POLYCAST® 600 Vinyl Ester Series Kit with FG0644SP Slotted Fiberglass Grate

    POLYCAST® 600 Vinyl Ester Series Kit with FG0644SP Slotted Fiberglass Grate

    Regular price From $421.14 USD
    Regular price Sale price From $421.14 USD
    Unit price /  per 
  • ZURN Z884-U3 Bottom Outlet

    3" No-Hub Bottom Outlet for Z884

    3" No-Hub Bottom Outlet for Z884

    Regular price $41.00 USD
    Regular price Sale price $41.00 USD
    Unit price /  per 
  • Dura Slope with 609 BoOF Grates

    NDS® Dura Slope Kit with DS-609-BF Deco Slot Grate | Baked on Oil Finish

    NDS® Dura Slope Kit with DS-609-BF Deco Slot Grate | Baked on Oil Finish

    Regular price From $594.97 USD
    Regular price Sale price From $594.97 USD
    Unit price /  per 
  • 8in Micro Mesh-EZ Frame

    8" Fiberglass Kit w/ Micro Mesh ADA Compliant Grate and EZ Frame - Load Class A

    8" Fiberglass Kit w/ Micro Mesh ADA Compliant Grate and EZ Frame - Load Class A

    Regular price From $426.79 USD
    Regular price Sale price From $426.79 USD
    Unit price /  per 
  • P6-DGE Zurn ductile iron class E grate

    Zurn P6-DGE Class E H-20 Slotted Ductile Iron 6" x 20" Grate

    Zurn P6-DGE Class E H-20 Slotted Ductile Iron 6" x 20" Grate

    Regular price $154.00 USD
    Regular price Sale price $154.00 USD
    Unit price /  per 
  • Trench•Era™ FP Series Drain System w/FG1245 14" Wide Class A Grate - MD Stainless Frame

    Trench•Era™ FP Series Drain System w/FG1245 14" Wide Class A Grate - MD Stainless Frame

    Trench•Era™ FP Series Drain System w/FG1245 14" Wide Class A Grate - MD Stainless Frame

    Request quote
  • Trench•Era™ FP Series Drain System w/DG1248R 14" Wide Class C Grate - MD Stainless Frame

    Trench•Era™ FP Series Drain System w/DG1248R 14" Wide Class C Grate - MD Stainless Frame

    Trench•Era™ FP Series Drain System w/DG1248R 14" Wide Class C Grate - MD Stainless Frame

    Request quote
  • POLY600-SS-675 Polycast 600 Kit with DG0675 Transverse slot HDPE Plastic Grates with a Stainless Steel Edge

    POLYCAST® 600 Vinyl Ester Series Kit with DG0675 Slotted HDPE Grate & Stainless Edge

    POLYCAST® 600 Vinyl Ester Series Kit with DG0675 Slotted HDPE Grate & Stainless Edge

    Regular price From $357.41 USD
    Regular price Sale price From $357.41 USD
    Unit price /  per 
  • Slotted 609 grates in Dura Slope

    NDS® Dura Slope Kit with DS-609 Deco Slot Grate | RAW

    NDS® Dura Slope Kit with DS-609 Deco Slot Grate | RAW

    Regular price From $539.77 USD
    Regular price Sale price From $539.77 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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