Tempo Square Flat Grates

Tempo Square Flat Grates

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Product Description

This is a durable, square, flat grate designed to be used with a catch basin. The large opening slots allow maximum flow while still preventing large debris from entering the drainage system. Capable of withstanding auto and light truck traffic at speeds under 20 mph. This square flat grate fits onto a catch basin and is used for medium sized areas of grass, flower beds, decks, driveways, golf courses, medians, etc. When installed, the grate surface is flush with the surrounding area. For safety reasons and to prevent vandalism or theft, the grate has two screw holes for securing to the basin (screws not included). Available for 9", 12" and 18" basins. 


  • Manufactured from structurally foamed High Density Polyethylene (HDPE)
  • UV stabilized to protect from sun degradation
  • Available in green or black
  • Textured anti-skid surface
  • Load rated for autos and light trucks at speed less than 20 mph
  • Includes two bolt holes to secure to basin (screws not included). Use #6 x 1.5" flat Phillips head stainless screws)
  • ADA compliant
  • Made in the USA
Specifications9" Square Grate12" Square Grate18" Square Grate
Weight0.90 lbs1.70 lbs5.40 lbs
Open Area38 sq in53 sq in92 sq in
Slot Width3/8″7/16"15/32"
Flow Rating50 GPM70 GPM120 GPM
Max Load Rating*2,000 lbs*5,000 lbs*4,000 lbs*

*Maximum load based on weight uniformly applied across grate surface.

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