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  • Drainage Kits
    • Popular Manufacturers
      • TDS
      • NDS
      • POLYCAST®
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      • Zurn
      • All Manufacturers
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      • Dura Slope
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      • Polycast 600/700
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      • All Drainage Systems
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      • FP1200
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      • Polycast 600/700
      • Slim Channel
      • SS600
      • ULMA U100K(X)
      • All Drainage Systems
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  • ULMA Hydro Mini Plus with 406 Heelproof Galvanized Mesh Grate load class B

    ULMA HYDROPLUS Mini with Galvanized Mesh Heelproof Grate (406 / GEHX100KCB) Class B

    ULMA HYDROPLUS Mini with Galvanized Mesh Heelproof Grate (406 / GEHX100KCB) Class B

    Regular price From $204.14 USD
    Regular price Sale price From $204.14 USD
    Unit price /  per 
  • ULMA HYDROPLUS Mini with IA-JANIS-0520-BF Iron Age Janis Grate BoOF

    HYDROPLUS Mini w/ Iron Age 5" Janis BoOF Cast Iron Grate | Class B

    HYDROPLUS Mini w/ Iron Age 5" Janis BoOF Cast Iron Grate | Class B

    Regular price From $508.32 USD
    Regular price Sale price From $508.32 USD
    Unit price /  per 
  • 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

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

    Regular price From $508.32 USD
    Regular price Sale price From $508.32 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with IA-IA-JOE-0520-HP-BF Iron Age Regular Joe Heel Proof BoOF Grate Class B

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

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

    Regular price From $508.32 USD
    Regular price Sale price From $508.32 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus with ULMA 494 ADA Heel proof Polypropylene Black Grate Class A

    ULMA HYDROPLUS Mini with 494/PNH100KCAM Slotted HP Grate Class A

    ULMA HYDROPLUS Mini with 494/PNH100KCAM Slotted HP Grate Class A

    Regular price From $117.62 USD
    Regular price Sale price From $117.62 USD
    Unit price /  per 
  • Hydro Mini Plus with 436 SS Wedge Wire Class A_1 Meter

    ULMA HYDROPLUS Mini w/ Stainless Steel ADA/Heelproof Wedge Wire Grate (436) Class B

    ULMA HYDROPLUS Mini w/ Stainless Steel ADA/Heelproof Wedge Wire Grate (436) Class B

    Regular price From $530.45 USD
    Regular price Sale price From $530.45 USD
    Unit price /  per 
  • ULMA HydroMini Plus with 402 Galvanized Mesh Grate load class B

    ULMA HYDROPLUS Mini with Galvanized Mesh Grate (402 / GEX100KCB) Class B

    ULMA HYDROPLUS Mini with Galvanized Mesh Grate (402 / GEX100KCB) Class B

    Regular price From $154.19 USD
    Regular price Sale price From $154.19 USD
    Unit price /  per 
  • 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

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

    Regular price From $89.15 USD
    Regular price Sale price From $89.15 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with ULMA 410 Galvanized Steel erforated Grate Class A

    ULMA HYDROPLUS Mini with Galvanized Perforated Tread Grate (410 / GP100KCA) Class A

    ULMA HYDROPLUS Mini with Galvanized Perforated Tread Grate (410 / GP100KCA) Class A

    Regular price From $78.00 USD
    Regular price Sale price From $78.00 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with ULMA 460 Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (460) Class C

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (460) Class C

    Regular price From $135.94 USD
    Regular price Sale price From $135.94 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus with 461D Ductile Iron Slotted Class E 0.5M Grate

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (461D) Class E

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (461D) Class E

    Regular price From $155.76 USD
    Regular price Sale price From $155.76 USD
    Unit price /  per 
  • ULMA HYDROPLUS Mini w/ BARS Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ BARS Ductile Iron Grate Class C

    Sale

    ULMA HYDROPLUS Mini w/ BARS Ductile Iron Grate Class C

    Regular price From $183.00 USD
    Regular price $237.16 USD Sale price From $183.00 USD
    Unit price /  per 
    Sale
  • ULMA Hydro Mini Plus H80 with IA-IA-JOE-0520-HP Iron Age Regular Joe Heel Proof Grate Class B

    ULMA HYDROPLUS Mini w/ Iron Age Regular Joe Raw Heel Proof Grate | Class B

    ULMA HYDROPLUS Mini w/ Iron Age Regular Joe Raw Heel Proof Grate | Class B

    Regular price From $396.78 USD
    Regular price Sale price From $396.78 USD
    Unit price /  per 
  • ULMA HYDROPLUS with 480 ductile iron heel proof slotted grate

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (480) Class C

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (480) Class C

    Regular price From $159.97 USD
    Regular price Sale price From $159.97 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with IA-IA-JOE-0520-BF Iron Age Regular Joe Grate BoOF Class B

    ULMA HYDROPLUS Mini w/ Iron Age Regular Joe BoOF Cast Iron Grate | Class B

    ULMA HYDROPLUS Mini w/ Iron Age Regular Joe BoOF Cast Iron Grate | Class B

    Regular price From $500.54 USD
    Regular price Sale price From $500.54 USD
    Unit price /  per 
  • HYDRO MINI PLUS with Iron Age Mission Bay Heel Proof BoOF Grate IA-BAY00520-HP-BF

    ULMA HYDROPLUS Mini w/ Iron Age IA-BAY-0520-HP-BF Mission Bay HP BoOF Cast Iron Grate | Class B

    ULMA HYDROPLUS Mini w/ Iron Age IA-BAY-0520-HP-BF Mission Bay HP BoOF Cast Iron Grate | Class B

    Regular price From $508.32 USD
    Regular price Sale price From $508.32 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with IA-ARGO-0520-HP Iron Age Argo Heel proof Grate Class B

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

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

    Regular price From $396.78 USD
    Regular price Sale price From $396.78 USD
    Unit price /  per 
  • ULMA HYDROPLUS Mini w/ FERN Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ FERN Ductile Iron Grate Class C

    Sale

    ULMA HYDROPLUS Mini w/ FERN Ductile Iron Grate Class C

    Regular price From $183.00 USD
    Regular price $237.16 USD Sale price From $183.00 USD
    Unit price /  per 
    Sale
  • ULMA HYDROPLUS Mini w/ LUNA Ductile Iron Grate Class C

    ULMA HYDROPLUS Mini w/ LUNA Ductile Iron Grate Class C

    Sale

    ULMA HYDROPLUS Mini w/ LUNA Ductile Iron Grate Class C

    Regular price From $183.00 USD
    Regular price $237.16 USD Sale price From $183.00 USD
    Unit price /  per 
    Sale
  • ULMA HYDRO PLUS Mini with 440 SS Perforated Grate Class A_1 Meter

    ULMA HYDROPLUS Mini with Stainless Steel Perforated Tread Grate (440 / IP100KCA) Class A

    ULMA HYDROPLUS Mini with Stainless Steel Perforated Tread Grate (440 / IP100KCA) Class A

    Regular price From $192.80 USD
    Regular price Sale price From $192.80 USD
    Unit price /  per 
  • ULMA HYDRO MINI PLUS with IA-BAY-0520-HP Raw

    ULMA HYDROPLUS Mini IA-BAY-0520-HP Iron Age Mission Bay HP Raw Cast Iron Grate | Class B

    ULMA HYDROPLUS Mini IA-BAY-0520-HP Iron Age Mission Bay HP Raw Cast Iron Grate | Class B

    Regular price From $396.78 USD
    Regular price Sale price From $396.78 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus with 462G Gatic Grate Class D

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (462G)

    ULMA HYDROPLUS Mini with Ductile Iron Slotted Grate (462G)

    Regular price From $147.35 USD
    Regular price Sale price From $147.35 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus H80 with IA-LOC-0520 Iron Age Locust Grate Class B

    ULMA HYDROPLUS Mini w/ Iron Age 5" Locust Raw Cast Iron Grate | Class B

    ULMA HYDROPLUS Mini w/ Iron Age 5" Locust Raw Cast Iron Grate | Class B

    Regular price From $396.78 USD
    Regular price Sale price From $396.78 USD
    Unit price /  per 
  • ULMA Hydro Mini Plus with ULMA 497 ADA Mesh Polypropylene Black Grate Class A

    ULMA HYDROPLUS Mini with 497 / PE100KCBM Mesh Grate Class B

    ULMA HYDROPLUS Mini with 497 / PE100KCBM Mesh Grate Class B

    Regular price From $141.18 USD
    Regular price Sale price From $141.18 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
Shop All

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