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Outdoor Trench Drain Kit - Commercial Grade - H20 Load Rating - Iron Grate - 48" Long Channel

Outdoor Trench Drain Kit - Commercial Grade - H20 Load Rating - Iron Grate - 48" Long Channel

Outdoor Trench Drain Kit - Commercial Grade - H20 Load Rating - Iron Grate - 48" Long Channel

$603.90


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SKU DS-091NDIKIT-

The Outdoor Trench Drain Kit is pre-assembled to provide efficient stormwater management in exterior applications. Neutral-invert design and ductile iron grates combine to give commercial-level reliability outdoors.

  • Ready-to-Install – Includes neutral channel section, ductile iron grates with hardware, end outlet, end cap, and grate locks.
  • Grate Durability – Ductile iron grates provide corrosion resistance and strength in exterior environments.
  • Channel Size – Measures 6″ wide × 4 ft long, with a 4.3″ invert depth and 6.1″ total depth for good water-carrying capacity.
  • Neutral Base Profile – Flat invert makes it well suited for level patios, walkways, and outdoor driveways.
  • Traffic Rating – H-20 rating ensures the kit is capable of supporting vehicles when properly installed.

Steel Grate Option: Galvanized steel grates are also available as an accessory to this kit. Adding a steel grate will reduce the load rating to Class C. Two grates are required per channel.

Note: It is recommended that a bottom drain is installed after each run of 5 connected channels. The bottom drain easily connects to the underside of the channel drain. 

Frequently Asked Questions

Kit Includes: 

  • (1) 4.3 in. Deep neutral channel drain section
  • (2) Ductile iron grates with screws
  • (4) ProFit™ grate locks
  • (1) End outlet
  • (1) End cap
  • Screws to attach end component

Applications

  • Captures surface runoff and directs it to a connected drain pipe, preventing property damage, mildew, slip hazards, and concrete staining
  • Ideal for driveways, parking areas, loading docks, pool decks, and other impervious surfaces in residential, commercial, industrial, and municipal settings
  • Integrates with Dura Slope® channel drains, grates, and accessories to safely convey stormwater downstream

Features

  • All-in-one kit eliminates the hassle of searching for parts or making multiple trips to your supplier
  • Pre-packaged for convenience, keeping components organized and preventing lost or misplaced pieces on the job site
  • Modular channel connects easily to additional Dura Slope components with secure tongue-and-groove joints

Spec Sheets

Specifiction Sheet >

Installation Instructions >

Visit ndspro.com for a complete selection of specification sheets and other technical information.

Quote Request

Not sure of the exact parts needed for your project? Please submit an NDS Channel / Trench Drain Quote Request >

Shipping

  • All items ship for free (standard ground, see map)
  • Call: (800) 604-5537 for pricing and shipping questions. Shipping estimates shown on the map pertain to this specific product only.
  • Orders typically ship in 1-2 business days. Transit times displayed in the map are listed in business days, and are approximate. The day that the order is shipped is not counted as a transit day.
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View Our Full Selection of NDS Channel Drain Products →

Custom Trench / Channel Drain System & Accessories (Free Shipping)

The above kit is one product in the Dura Slope® trench drain series. If you are looking to put togehter a sloped drain or custom system please see the components below. Please note, accessories (grates, clips, caps, etc.) must be purchased with a channel /  trench drain system including channels and cannot ship alone.

Outdoor Trench Drain Kit: A Practical Installation & Buying Guide

The Outdoor Trench Drain Kit consolidates the core components you need for a rugged, concrete-embedded drainage run. This guide breaks down how the system works, why a neutral invert (flat-base) profile is useful, how to install it step-by-step, and how to choose the right grates—plus a real-world case study and FAQs.

Ambulance crossing an outdoor trench drain on a concrete apron
H-20 traffic-ready performance on station aprons.

What Is an Outdoor Trench Drain Kit?

It’s a pre-bundled trench drain package built for concrete embedment. Each kit includes a neutral (flat) invert channel, two ductile iron grates with fasteners, an end outlet, an end cap, and grate locks. In plain terms: you get the water-carrying channel, durable metal grates that finish flush to the slab, and the end components—making takeoffs simple and field installation faster.

Why pros choose kits

  • Everything ships together—fewer SKUs and fewer surprises onsite.
  • Matched components ensure consistent fit and tested load performance.
  • Streamlined staging, fewer seams, and predictable results.

Key Specifications & Performance

Spec Value Plain-English Benefit
Channel Width × Length 6″ × 4 ft per section Compact footprint for aprons, sidewalks, plazas; sections link for longer runs.
Invert Depth / Total Depth 4.3″ invert / 6.1″ total Good hydraulic capacity without excessive excavation.
Invert Type Neutral (flat base) Ideal when the slab provides the fall or you need precise thresholds.
Standard Grates Ductile iron (locking) High strength and wear resistance for concrete slabs and traffic zones.
Traffic Rating H-20 (with proper installation) Handles passenger vehicles and light trucks; suitable for drive lanes and aprons.
Optional Grates Galvanized steel (accessory) Two per channel; reduces rating to Class C for lighter-duty applications.
Close-up of outdoor trench drain channel and locking grate
Locking grate and channel interface—fast, secure maintenance.

When a Neutral-Invert Channel Is the Right Call

A neutral invert means the channel’s interior base is flat—no built-in slope. Pick it when your concrete slab sets the grade or when you need tight elevation control at transitions (garages, ADA routes, doorways, apparatus bays). In short: the slab dictates the slope; the channel follows it.

Ideal applications

  • Firehouse and EMS aprons, vehicle bays, and drive lanes
  • Commercial plazas, sidewalks, and dock thresholds
  • Retrofits with limited excavation depth
  • Door and gate openings requiring precise grate height

Concrete-Embed Installation: Step-by-Step

  1. Layout & Elevations: Snap lines; confirm finished grate height. Ensure the slab design provides fall to the outlet.
  2. Excavate & Bed: Provide space for the channel plus concrete encasement. Compact base and place stable bedding.
  3. Form & Support: Set forms. Dry-fit channels, end cap, and end outlet. Use rebar legs/ties or channel feet (if provided) to hold elevation.
  4. Join Sections: Connect channels as directed. Use grate locks or bracing to prevent bulging during the pour.
  5. Verify Alignment: Check straightness, joint seating, and top-of-grate height relative to slab edges.
  6. Place Concrete: Pour evenly on both sides to avoid float. Consolidate gently to eliminate voids without shifting channels.
  7. Finish & Cure: Finish flush to the grate rails. Allow full cure per mix design before opening to traffic.
  8. Install Grates: After cure, set ductile iron grates and fasteners; torque to recommendations.

Pro tips (avoid callbacks)

  • Brace/lock channels before the pour to maintain straight lines.
  • Eliminate voids at sidewalls—voids reduce support and load capacity.
  • Confirm outlet height and piping prior to pour day.
Outdoor trench drain embedded in concrete at a firehouse apron
Reliable runoff control at a firehouse apron.

Case Study: Firehouse Apron Drainage Upgrade

Site: Municipal fire station with frequent washdowns and storm flows across the apparatus apron.
Problem: Water tracked toward bay doors, causing slick spots and maintenance issues during storms and decontamination cycles.
Solution: A 90-ft run of the Outdoor Trench Drain Kit was installed across the apron. Crews re-poured a banded slab with ~1% fall toward the end outlet and used ductile iron grates to meet traffic/axle demands.

Why this kit: The all-in-one package simplified procurement; the neutral invert delivered precise elevation control with the re-graded slab. The H-20 rating supported daily emergency vehicle crossings.

  • Install time: Two days (demo, trenching, set, pour), plus post-cure grate install.
  • Outcome: Controlled flow away from doors; improved footing; clean, uniform grate line.
  • Maintenance: Quarterly grate lift/flush; minimal sediment accumulation.

Selecting Ductile Iron vs. Galvanized Steel Grates

Ductile iron grates deliver maximum strength and wear resistance in concrete, supporting the system’s H-20 traffic rating when installed correctly. For lighter-duty or decorative zones, you may choose galvanized steel grates; note this reduces the load class to C and requires two grates per channel.

Common Installation Mistakes

  • Insufficient support during the pour—leads to bowing or misalignment.
  • Voids beside the channel—undermine support and lower load rating.
  • Incorrect grate elevation relative to slab—causes trip edges or bypass flow.
  • Skipping locks/fasteners—can allow rattle or displacement under traffic.

Maintenance & Service Life

Build a simple inspection and cleanout schedule—quarterly for most commercial/municipal sites, seasonally for residential. Lift grates, remove debris, and flush toward the outlet. With proper embedment and care, the channel and ductile iron grates offer a long, low-maintenance service life.

FAQ: Outdoor Trench Drain Kits

Does a neutral invert drain still need slope?
Yes. The concrete slab must provide the fall; the channel follows that grade toward the outlet.
Is H-20 suitable for emergency vehicles?
H-20 covers typical passenger and light truck loads when properly embedded in concrete. For heavier axle loads, verify requirements with your engineer.
Can I switch to galvanized steel grates later?
You can, but the load class drops to Class C. Ensure the location’s traffic matches that lighter-duty rating.
How many steel grates are required per channel?
Two galvanized steel grates per channel section are required when selecting the optional steel grate accessory.

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