3″ Round Flat Grate

A robust round, flat drain manufactured from a structurally foamed High Density Polyethylene (HDPE) with a UV inhibitor to reduce sun damage. This grate is designed with large opening slots for maximum flow while still preventing large debris from entering the drainage system. Capable of withstanding pedestrian, bicycle and wheelchair traffic. When installed grate surface is flush with the surrounding area. Precision engineered and manufactured to attach directly to Sewer and Drain Pipe and Fittings, Triple Wall Pipe and Corrugated Pipe. Easy to use, installs in minutes and blends well with the landscape. This product is available in green, black, sand, grey and purple. Typical application would be for direct attachment to Drainage Pipe where a catch basin is not appropriate or feasible. Available in 3″, 4″ and 6″ diameters.



  • Manufactured from structurally foamed High Density Polyethylene (HDPE).
  • UV stabilized to protect from sun degradation.
  • Available in green, black, sand, grey and purple.
  • Each grate has three stepped diameters to fit Sewer and Drain Pipe and Fittings, Triple Wall Pipe and Corrugated Pipe.
  • Textured anti-skid surface.
  • Load rated for pedestrian traffic.
  • ADA compliant.
  • Made in the USA.


Dimensions: 3.60″ diameter x 1.70″ height
Weight: 0.13 lbs.
Open Area: 3 sq in
Slot Width: 3/16″
Flow Rating: 3 GPM
Max Load: 500 lbs.   (Maximum load based on weight uniformly applied across entire grate surface.)
Material: Structurally foamed High Density Polyethylene (HDPE) with UV inhibitor



Sewer & Drain Hub Fittings: 3″ (SDR 35)
Sewer & Drain Pipe: 3″ (ASTM D2729)
Corrugated Pipe: 3″
Triple Wall Pipe: 3″




A flat grate that can be used for relatively small areas of grass, flower beds, patios, driveways, etc. without the need for a catch basin. Grate connects directly to drainage pipe. Excess water flows towards and through the grate and then drains directly to below grade drainage pipe that allows the water to flow to areas where excess water can be tolerated. Grate can withstand pedestrian and bicycle traffic.

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