3″ Round Atrium Grate

A robust round, domed 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. 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 and sand. Typical application would be for areas where floating debris could block a flat grate. Grate can be directly attached 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 and sand.
  • Each grate has three stepped diameters to fit Sewer and Drain Pipe and Fittings, Triple Wall Pipe and Corrugated Pipe.
  • Textured anti-skid surface.
  • Made in the USA.


Dimensions: 3.60″ diameter x 3.80″ height
Weight: 0.15 lbs.
Open Area: 9 sq in
Slot Width: 1/4″
Flow Rating: 12 GPM
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 domed grate that is typically used for relatively small areas of flower beds that are mulched. Grate connects directly to drainage pipe without the need for a catch basin. 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. This style of grate is not recommended for any areas exposed to traffic. The domed or atrium style is designed to prevent mulch or debris from plugging the grate openings.

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