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      • TDS
      • NDS
      • POLYCAST®
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      • SS600
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      • All Drainage Systems
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Products Blogs
  • HYDROPLUS with Iron Age Oblio Raw Cast Iron

    ULMA HYDROPLUS with Iron Age OA5-20I21 / IA-OBLIO-0520 Oblio Raw Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS with Iron Age OA5-20I21 / IA-OBLIO-0520 Oblio Raw Cast Iron Grate Class B

    Regular price From $441.85 USD
    Regular price $465.78 USD Sale price From $441.85 USD
    Unit price /  per 
    Sale
  • U100KM-GN100KCA Galv. Steel Slotted class A grate polymer concrete galv edge ULMA channel

    ULMA U100K Drainage Kit with ULMA 420 Slotted Grate | Galvanized Load Class A

    Sale

    ULMA U100K Drainage Kit with ULMA 420 Slotted Grate | Galvanized Load Class A

    Regular price From $85.59 USD
    Regular price $110.04 USD Sale price From $85.59 USD
    Unit price /  per 
    Sale
  • U100KX-BA-PED-0520

    ULMA U100KX Drain Channel kit w/Bronze Age™ PEDREDA Grate-RAW

    Sale

    ULMA U100KX Drain Channel kit w/Bronze Age™ PEDREDA Grate-RAW

    Regular price From $206.23 USD
    Regular price $240.15 USD Sale price From $206.23 USD
    Unit price /  per 
    Sale
  • 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

    Sale

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

    Regular price $138.56 USD
    Regular price $124.70 USD Sale price $138.56 USD
    Unit price /  per 
    Sale
  • U100K ULMA galvanized edge channel with reinforced galvanized steel slotted grate

    ULMA U100K Drainage Kit with ULMA Reinforced Slotted 424 Grate | Galvanized

    Sale

    ULMA U100K Drainage Kit with ULMA Reinforced Slotted 424 Grate | Galvanized

    Regular price From $311.44 USD
    Regular price $390.42 USD Sale price From $311.44 USD
    Unit price /  per 
    Sale
  • ULMA M100KX polymer concrete linear channel with stainless edge and 494 black poly grate

    ULMA M100KX Kit with 494 ADA/Heel-Proof Poly Grate Class A - BLACK

    Sale

    ULMA M100KX Kit with 494 ADA/Heel-Proof Poly Grate Class A - BLACK

    Regular price From $294.98 USD
    Regular price $369.26 USD Sale price From $294.98 USD
    Unit price /  per 
    Sale
  • Iron Age Cast Iron Paradise Raw Grate

    ULMA HYDROPLUS with Iron Age PA5-20I21 / IA-PAR-0520 Paradise Raw Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS with Iron Age PA5-20I21 / IA-PAR-0520 Paradise Raw Cast Iron Grate Class B

    Regular price From $441.85 USD
    Regular price $465.78 USD Sale price From $441.85 USD
    Unit price /  per 
    Sale
  • U100K-TDS0461 cast iron class E grate ulma polymer concrete channel

    ULMA U100K Drainage Kit w/ TDS 461D Slotted Ductile Iron Grate

    Sale

    ULMA U100K Drainage Kit w/ TDS 461D Slotted Ductile Iron Grate

    Regular price From $1,433.51 USD
    Regular price $1,833.08 USD Sale price From $1,433.51 USD
    Unit price /  per 
    Sale
  • D&L J-4222-04

    J-4222-04 Heavy Duty Cast Iron 12" x 24" x 1.5" Grate | D&L Foundry

    J-4222-04 Heavy Duty Cast Iron 12" x 24" x 1.5" Grate | D&L Foundry

    Regular price $206.40 USD
    Regular price Sale price $206.40 USD
    Unit price /  per 
  • ULMA U100K Drain Channel kit w/Bronze Age™ CATHEDRAL Grate-RAW

    ULMA U100K Drain Channel kit w/Bronze Age™ CATHEDRAL Grate-RAW

    Sale

    ULMA U100K Drain Channel kit w/Bronze Age™ CATHEDRAL Grate-RAW

    Regular price From $155.28 USD
    Regular price $174.64 USD Sale price From $155.28 USD
    Unit price /  per 
    Sale
  • 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
  • ULMA U100KX with Stainless Steel Edge and Stainless Steel Perforated Grate

    ULMA U100KX w/ Stainless Steel Perforated Grate (440)

    Sale

    ULMA U100KX w/ Stainless Steel Perforated Grate (440)

    Regular price From $477.69 USD
    Regular price $604.17 USD Sale price From $477.69 USD
    Unit price /  per 
    Sale
  • ULMA HYDROPLUS w/ PED Ductile Iron Grate - Class C

    ULMA HYDROPLUS w/ PED Ductile Iron Grate - Class C

    Sale

    ULMA HYDROPLUS w/ PED Ductile Iron Grate - Class C

    Regular price From $267.93 USD
    Regular price $291.86 USD Sale price From $267.93 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
  • ULMA HYDRO PLUS with IA-GRK-0520-BF Iron Age Greek Key BoOF Grate-Class B

    ULMA HYDROPLUS w/ Iron Age IA-GRK-0520-BF Greek Key BoOF Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS w/ Iron Age IA-GRK-0520-BF Greek Key BoOF Cast Iron Grate Class B

    Regular price From $559.11 USD
    Regular price $583.04 USD Sale price From $559.11 USD
    Unit price /  per 
    Sale
  • ULMA HYDRO PLUS with IA-JOE-0520-HP-BF Iron Age Regular Joe Heel Proof BoOF Grate_Class B

    ULMA HYDROPLUS with Iron Age IA-JOE-0520-HP-BF Regular Joe Heel Proof - BoOF

    Sale

    ULMA HYDROPLUS with Iron Age IA-JOE-0520-HP-BF Regular Joe Heel Proof - BoOF

    Regular price From $551.97 USD
    Regular price $573.86 USD Sale price From $551.97 USD
    Unit price /  per 
    Sale
  • HYDROPLUS 5 inch Channel showing side outlet

    ULMA HYDROPLUS Channel 1M Section

    Sale

    ULMA HYDROPLUS Channel 1M Section

    Regular price $20.00 USD
    Regular price $20.00 USD Sale price $20.00 USD
    Unit price /  per 
    Sale
  • ULMA drain channel with stainless steel edge and polypropylene grate

    ULMA U100KX Kit 495 / PNH100KCAM-GRIS Polypropylene ADA/HP Class A Gray Grate

    Sale

    ULMA U100KX Kit 495 / PNH100KCAM-GRIS Polypropylene ADA/HP Class A Gray Grate

    Regular price From $142.87 USD
    Regular price $183.70 USD Sale price From $142.87 USD
    Unit price /  per 
    Sale
  • ULMA 406_407 GEHX100KCB-Mesh Heelproof Galvanized grate

    ULMA 407 / GEHX100KCBM Mesh Heelproof Galvanized Grate 0.5M Class B

    Sale

    ULMA 407 / GEHX100KCBM Mesh Heelproof Galvanized Grate 0.5M Class B

    Regular price $99.98 USD
    Regular price $89.98 USD Sale price $99.98 USD
    Unit price /  per 
    Sale
  • ULMA HYDROPLUS Mini w/ WAVE Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ WAVE Ductile Iron Grate Class C

    Sale

    ULMA HYDROPLUS Mini w/ WAVE Ductile Iron Grate Class C

    Regular price From $228.68 USD
    Regular price $237.16 USD Sale price From $228.68 USD
    Unit price /  per 
    Sale
  • 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 
  • U100KM-FNHX100KCCM-2 Cast Iron Slotted grate class c polymer concrete galv edge ULMA channel

    ULMA U100K Drainage Kit with ULMA Ductile Iron Slotted Grate

    Sale

    ULMA U100K Drainage Kit with ULMA Ductile Iron Slotted Grate

    Regular price From $313.46 USD
    Regular price $393.03 USD Sale price From $313.46 USD
    Unit price /  per 
    Sale
  • M100K-GN100KCC Reinforced Galvanized Steel grate polymer concrete galv edge ULMA channel

    ULMA M100K Rein. Galv. Steel Slotted Grate (1M)

    Sale

    ULMA M100K Rein. Galv. Steel Slotted Grate (1M)

    Regular price From $232.52 USD
    Regular price $288.96 USD Sale price From $232.52 USD
    Unit price /  per 
    Sale
  • ULMA HYDROPLUS with Iron Age Oblio Heel Proof Cast Iron Raw Grate

    ULMA HYDROPLUS w/ IA-OBLIO-0520-HP Oblio Heel Proof Raw Cast Iron Grate Class B

    Sale

    ULMA HYDROPLUS w/ IA-OBLIO-0520-HP Oblio Heel Proof Raw Cast Iron Grate Class B

    Regular price From $441.85 USD
    Regular price $465.78 USD Sale price From $441.85 USD
    Unit price /  per 
    Sale
  • ULMA 402_403 GEX100KCB-Mesh Galvanized grate

    ULMA 403 / GEX100KCBM Mesh Galvanized Grate 0.5M Class B

    Sale

    ULMA 403 / GEX100KCBM Mesh Galvanized Grate 0.5M Class B

    Regular price $83.94 USD
    Regular price $75.55 USD Sale price $83.94 USD
    Unit price /  per 
    Sale
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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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