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  • Drainage Kits
    • Popular Manufacturers
      • TDS
      • NDS
      • POLYCAST®
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      • Zurn
      • All Manufacturers
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      • Dura Slope
      • Mini Channel
      • Polycast 600/700
      • Slim Channel
      • SS600
      • ULMA U100K(X)
      • All Drainage Systems
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      • All Load Classes
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      • FP1200
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      • Polycast 600/700
      • Slim Channel
      • SS600
      • ULMA U100K(X)
      • All Drainage Systems
    • Grate Material
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      • Ductile/Cast Iron
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  • ULMA Hydro Mini Plus with IA-ARGO-0520-HP-BF Iron Age Argo Heel proof BoOF Grate Class B

    ULMA HYDROPLUS Mini w/ Iron Age IA-ARGO-0520-HP-BF Argo Heel Proof BoOF Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS Mini w/ Iron Age IA-ARGO-0520-HP-BF Argo Heel Proof BoOF Cast Iron Grate Class B

    Regular price From $519.86 USD
    Regular price $528.34 USD Sale price From $519.86 USD
    Unit price /  per 
    Sale
  • ULMA D100-495

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

    Sale

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

    Regular price From $287.93 USD
    Regular price $309.00 USD Sale price From $287.93 USD
    Unit price /  per 
    Sale
  • ULMA M100KX Channel with Stainless Steel Edge and BoOF Mission Bay Grate

    ULMA M100KX Kit w/Iron Age Heel Proof Mission Bay Grate | BoOF

    Sale

    ULMA M100KX Kit w/Iron Age Heel Proof Mission Bay Grate | BoOF

    Regular price From $3,269.23 USD
    Regular price $3,527.33 USD Sale price From $3,269.23 USD
    Unit price /  per 
    Sale
  • A-FOAM-0336 Stainless Steel 3x36

    Bronze Age TDS-FOAM-0336-L Foam 316L Stainless Steel 3″x36″ Grate Load Class B

    Bronze Age TDS-FOAM-0336-L Foam 316L Stainless Steel 3″x36″ Grate Load Class B

    Regular price $249.00 USD
    Regular price Sale price $249.00 USD
    Unit price /  per 
  • New Image Coming Soon

    POLYCAST 600 Series Kit w/ ADA DG0675HD-G Transverse Slotted Ductile Iron-Galvanized Grate & Edging

    POLYCAST 600 Series Kit w/ ADA DG0675HD-G Transverse Slotted Ductile Iron-Galvanized Grate & Edging

    Regular price From $277.24 USD
    Regular price Sale price From $277.24 USD
    Unit price /  per 
  • HYDROPLUS with Iron Age Rain Raw Grate

    ULMA HYDROPLUS with Iron Age RNN3-12I01HP / IA-RAIN-0520 Rain Raw Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS with Iron Age RNN3-12I01HP / IA-RAIN-0520 Rain Raw Cast Iron Grate Class B

    Regular price From $434.71 USD
    Regular price $456.60 USD Sale price From $434.71 USD
    Unit price /  per 
    Sale
  • New Image Coming Soon

    POLYCAST 700 Series Kit w/ DG0641D-G Slotted Ductile Iron-Galvanized Grate & Ductile Frame

    POLYCAST 700 Series Kit w/ DG0641D-G Slotted Ductile Iron-Galvanized Grate & Ductile Frame

    Regular price From $311.43 USD
    Regular price Sale price From $311.43 USD
    Unit price /  per 
  • ULMA U100KX with 486 Vinyl Ester 0.9 FRP Grate

    ULMA U100KX Kit with TDS 486 Vinyl Ester Bar Center Grate 0.9" on Center - Class B

    Sale

    ULMA U100KX Kit with TDS 486 Vinyl Ester Bar Center Grate 0.9" on Center - Class B

    Regular price From $572.06 USD
    Regular price $725.51 USD Sale price From $572.06 USD
    Unit price /  per 
    Sale
  • ULMA drain channel with stainless steel edge and polypropylene grate

    ULMA U100K Kit with 494 / PNH100KCAM Polypropylene ADA Heel Proof Grate – BLACK

    Sale

    ULMA U100K Kit with 494 / PNH100KCAM Polypropylene ADA Heel Proof Grate – BLACK

    Regular price From $298.23 USD
    Regular price $373.44 USD Sale price From $298.23 USD
    Unit price /  per 
    Sale
  • ULMA drain channel with stainless steel edge and polypropylene grate

    ULMA U100K Kit with 495 / PNH100KCAM-GRIS Polypropylene ADA Heel Proof Grate – GRAY

    Sale

    ULMA U100K Kit with 495 / PNH100KCAM-GRIS Polypropylene ADA Heel Proof Grate – GRAY

    Regular price From $304.36 USD
    Regular price $381.33 USD Sale price From $304.36 USD
    Unit price /  per 
    Sale
  • NDS-864GMTL-Pro5 with Galvanized Slotted Grate

    NDS® Pro Series 5 Drain Kit w/Galv. Steel Grate

    NDS® Pro Series 5 Drain Kit w/Galv. Steel Grate

    Regular price $124.80 USD
    Regular price Sale price $124.80 USD
    Unit price /  per 
  • POLYCAST 600 with DG0631 SS Edge and SLOT grate

    POLYCAST 600 Series Kit w/ DG0631 Slotted Stainless Steel Grate & Edging | Load Class A

    POLYCAST 600 Series Kit w/ DG0631 Slotted Stainless Steel Grate & Edging | Load Class A

    Regular price From $317.18 USD
    Regular price Sale price From $317.18 USD
    Unit price /  per 
  • ULMA channel with galvanized edge and Carbochon Baked on Oil Finish grate

    ULMA U100K Drainage Kit with Iron Age Carbochon Grate | Baked on Oil Finish

    Sale

    ULMA U100K Drainage Kit with Iron Age Carbochon Grate | Baked on Oil Finish

    Regular price From $722.26 USD
    Regular price $785.42 USD Sale price From $722.26 USD
    Unit price /  per 
    Sale
  • ULMA M100KX stainless steel edged polymer concrete channel with 450 stainless steel slotted grate

    ULMA M100KX Kit with 450 / IN100KCA Stainless Steel Slotted Grate

    Sale

    ULMA M100KX Kit with 450 / IN100KCA Stainless Steel Slotted Grate

    Regular price From $340.42 USD
    Regular price $427.68 USD Sale price From $340.42 USD
    Unit price /  per 
    Sale
  • NDS833

    NDS 833 Pro Series 8 Channel Drain, Deep Light Gray

    NDS 833 Pro Series 8 Channel Drain, Deep Light Gray

    Regular price $92.75 USD
    Regular price Sale price $92.75 USD
    Unit price /  per 
  • IA-LOC-0520-BF Iron Age Locust 5 x 20 cast iron grate

    Iron Age IA-LOC-0424-BF Class B Locust Cast Iron 4" x 24" Grate - BoOF

    Iron Age IA-LOC-0424-BF Class B Locust Cast Iron 4" x 24" Grate - BoOF

    Regular price $227.37 USD
    Regular price Sale price $227.37 USD
    Unit price /  per 
  • U100K00M-RiverRock-boof cast iron ironage deco grate polymer concrete ULMA galv edge

    ULMA U100K Drainage Kit with Iron Age River Rock Grate | BoOF - Class B

    Sale

    ULMA U100K Drainage Kit with Iron Age River Rock Grate | BoOF - Class B

    Regular price From $722.26 USD
    Regular price $785.42 USD Sale price From $722.26 USD
    Unit price /  per 
    Sale
  • FP1200-FG1246-1-Ductile-Iron-Grate-Class-F

    TDS DG1246 Class F Slotted Ductile Iron 14" x 24" x 1.5" Grate

    TDS DG1246 Class F Slotted Ductile Iron 14" x 24" x 1.5" Grate

    Regular price $291.30 USD
    Regular price Sale price $291.30 USD
    Unit price /  per 
  • HYDROM-ANISE-0520-HP-BF ULMA HYDROPLUS Anise 0520-BOOF

    ULMA HYDROPLUS Mini w/ Iron Age Anise Heel Proof BoOF Cast Iron Grate | Class B

    Sale

    ULMA HYDROPLUS Mini w/ Iron Age Anise Heel Proof BoOF Cast Iron Grate | Class B

    Regular price From $474.10 USD
    Regular price $482.58 USD Sale price From $474.10 USD
    Unit price /  per 
    Sale
  • POLY700-AA-675D-TDSdrains cast iron frame transverse cast iron grate polymer concrete channel Polycast

    POLYCAST 700 Series Kit w/ DG0675HD ADA Transverse Slotted Ductile Iron Grate & Frame

    POLYCAST 700 Series Kit w/ DG0675HD ADA Transverse Slotted Ductile Iron Grate & Frame

    Regular price From $312.89 USD
    Regular price Sale price From $312.89 USD
    Unit price /  per 
  • ULMA HYDRO PLUS with ULMA 494 ADA Heel proof Polypropylene Black Grate-Class A

    ULMA HYDROPLUS with 494 / PNH100KCAM Polypropylene ADA Heel Proof Grate Class A - BLACK

    Sale

    ULMA HYDROPLUS with 494 / PNH100KCAM Polypropylene ADA Heel Proof Grate Class A - BLACK

    Regular price From $135.09 USD
    Regular price $171.06 USD Sale price From $135.09 USD
    Unit price /  per 
    Sale
  • M100K-GN100KCA Galv Slotted Grate polymer concrete shallow galv edge ULMA channel

    ULMA M100K W/ Slotted Galvanized Steel Grate (1M)

    Sale

    ULMA M100K W/ Slotted Galvanized Steel Grate (1M)

    Regular price From $196.24 USD
    Regular price $246.05 USD Sale price From $196.24 USD
    Unit price /  per 
    Sale
  • NDS 253GY - Box of 12 - Class B ADA Compliant Wave HDPE 4" x 24" (Nominal) Grate - GRAY

    NDS 253GY - Box of 12 - Class B ADA Compliant Wave HDPE 4" x 24" (Nominal) Grate - GRAY

    NDS 253GY - Box of 12 - Class B ADA Compliant Wave HDPE 4" x 24" (Nominal) Grate - GRAY

    Regular price $665.06 USD
    Regular price Sale price $665.06 USD
    Unit price /  per 
  • DG0640 POLYCAST Galvanized Slotted Grate

    POLYCAST DG0640 Slotted Galvanized 6" x 48" Grate | Load Class B

    POLYCAST DG0640 Slotted Galvanized 6" x 48" Grate | Load Class B

    Regular price $64.11 USD
    Regular price Sale price $64.11 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 $26.22
  • 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

    $80.36 $62.50
  • LD100X-2 Locking Device for ULMA Grates

    LD100X-2 Locking Device for ULMA Grates

    $12.96 $10.08
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