6″ Dura Slope Drainage Kit with Deco Cast Iron Grates – Interlaken


Pre-sloped decorative drain system by NDS.



Add a decorative pre-sloped drain to your driveway or patio with our Dura Slope Deco Drain Kit. This kit features the Interlaken pattern grate.

The 6″ Dura Slope by NDS is one of the most customizable plastic trench drains available for commercial projects. A lightweight HDPE drainage system, NDS Dura Slope sets high standards for chemical and load resistance. Its four foot modular channel sections offer 0.7% slope with rounded bottom, creating an efficient water evacuation route for any application. Each channel has a 4″ bottom outlet knockout that provides a greater degree of design variability for the drainage system.

Dura Slope channel drawingDura Slope™ channels are designed with the pre-installed ProFit™ locking system, which maintains structural integrity during installation and locking devices for the grating. LeveLoc™ integral re-bar supports are located at 24” intervals along each side of the channel and contain an internal protruding knob designed to grip #3 or #4 re-bar (3/8” – 1/2”) for easier channel height adjustment during installation. DuraLoc™ tongue and groove ends connect allowing for a precise fit and ensure straight channel runs, incorporating an integral snap-lock feature that prevents joint movement during channel installation.

For heavy trucks or fork truck traffic, we recommend adding the ductile iron frames to your kit.

Dura Slope in fire station

Uses: Garages, Driveways, Parking Lots, Public Areas, Swimming Pools, Recreational Areas
Channel Material: Structural foam polyethylene w/UV inhibitors
Clear Width: 4″ inside diameter w/2″ radius bottom
Total Width: 5.3″


  • Heavy Duty Decorative Cast iron grates in the Interlaken pattern – (5-7/8″ x 23-7/8″)
  • 2 fastening holes per grate
  • Free Drain Area: 16.5%
  • No openings greater than 1/2″

Select your kit length to fit your situation.

Each Dura Slope Kit Includes:

  • 1 – 48″ Dura Slope channel for each 4ft. of kit length ordered
  • 2 – 2ft. Interlaken deco cast iron grates for each 4ft. of length ordered (raw or BooF finish)
  • 4 – Grate Locking Devices for each 4ft. of length ordered
  • 1 – End Outlet (fits 4″ S&D pipe)
  • 1 – End Cap
  • Screws for mounting end cap and end outlet
  • Installation instructions


Dura Slope installationWe currently offer kit lengths up to 24ft. long. If you are needing a longer length, you can order several kits to the length you need or contact us for a quote. We would be happy to provide one.

Shipping Info:
Shorter length kits will ship UPS. Longer length kits will ship truck freight. If the shipping calculator is not providing a shipping cost or if the price seems out of line, please contact us for a shipping price. For shipping to AK, HI, PR, or Canada, please contact us.

DrainageKits.com reserves the right to choose the channel depth of the channels you receive. If you have certain channels or a channel depth in mind, please note this in Order Notes at checkout. We will do our best to accommodate you if the channels are in stock. Channels are shipped with installation covers that are to be in place during the concrete pour.

Additional information

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Kit Length

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No Frame, Ductile Iron Frame

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