Standard Side Grate

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Standard Side Grate

Aesthetically Pleasing Inlet for the Removal of Surface Water

Slotted Drain is a unique pipe which removes sheet flow without multiple grades or water channeling devices.

The pipe is cut along a longitudinal axis, and a trapezoidal or straight-sided grate with reinforcing spacer plates is welded to form a 1 3/4 -inch-wide slot opening. The slot collects runoff and channels it to the pipe below from which it flows to the appropriate outlet.

Slotted Drain is fabricated from galvanized steel for excellent durability or from Aluminized Steel Type 2 (ALT2) when more corrosion resistance is required.

The result is a practical, aesthetically pleasing inlet for the removal of surface water on streets, highways, and parking lots. Designers and engineers installing walkways and promenades around sports stadiums, civic centers, shopping malls, parks and other pedestrian-traveled surfaces have used Slotted Drain as an integral part of the landscape architecture.

Unlike typical parking lots that require grades to be sloped in four directions for each storm collection grate, a parking lot with slotted drain requires only one transverse and one longitudinal slope for the entire drainage area. That translates to a lower-cost installation for the contractor and owner; and less stake-out for the engineer. Because of Slotted Drain’s efficiency in removing surface water, fewer collectors and fewer laterals under the roadway are needed.

On roadways and highways, replacing curbs and drain basins with continuous lengths of Slotted Drain opens up an obstruction-free and single grade roadside that greatly enhances the effectiveness of the shoulder to improve safety.


Slotted Drain Features and Benefits


Fabricated from Contech Corrugated Steel Pipe

Structurally sound, supports H-20 loading

Intercepts up to 50% more runoff than most standard 2’ x 2’ grate inlets

Improved drainage efficiency

Only one transverse and one longitudinal slope

Fewer collectors and fewer laterals, lower cost installation

Hazardous dips and ponding grades are eliminated.

Improved safety

Straight-sided grate

Fewer debris problems, lower cost maintenance


Slotted Drain Pipe Coatings

  • Galvanized Steel - Pipe made from steel coated with zinc to extend service life. The most widely used and most economical metallic coating for corrugated steel pipe
  • Aluminized Steel Type 2 (ALT2) - Pipe made from steel that has been hot-dipped in commercially pure aluminum; offers 75 years or more of maintenance free service life

Slotted Drain Pipe Properties

  • 12” – 36” diameters available in 14 and 16 gauge
  • 30” and 36” diameter available in 12 gauge

Slotted Drain Applications

  • Curb inlets
  • Inlet system across driveway cuts
  • Shoulder drains along median barriers
  • Pedestrian thoroughfares, malls and bicycle paths
  • Replacements for curbs and berms where those obstacles are undesirable for safety reasons
  • Ground-level floors with drainage requirements
  • Parking lots or other continuous paved surfaces
  • Sidelines of playing fields in stadiums
  • Airport aprons, taxiways, hangars, and deicing areas
  • Railroad intermodal facilities with heavy wheel loads
Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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Thickness (Inches): 2Width (Inches): 18.827Length (Inches): 12.283Hole Qty: 3Bolt Hole Diameter (Inches): 1.25Blade Type: Ha//Hole Set 1 - Distance Of End To 1st Hole (Inches): 0Hole Set 1 - Distance...

Need help? We're available at256-442-3491 - Email:info@bateyandsanders.com
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