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Plastic Square Drainage Grates

Available in 9", 12" & 18" Flat and 9" & 12" Atrium Style

A rugged square grate designed to be used in conjunction with a catch basin. This grate is manufactured from a structurally foamed High Density Polyethylene (HDPE) with a UV inhibitor to reduce sun damage. This grate has large opening slots for maximum flow while still preventing large debris from entering the drainage system. Typical application would be areas where floating debris would block a flat grate. For safety reasons and to prevent vandalism or theft the grate has two holes enabling it to be screwed onto the basin.

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9" square flat drainage grate - green
9" Square Flat - Green 
Model: DG9SFG
9" square flat drainage grate - black
9" Square Flat - Black 
Model: DG9SFB
9" square flat drainage grate - sand
9" Square Flat - Sand 
Model: DG9SFS
9" square flat drainage grate - grey
9" Square Flat - Gray 
Model: DG9SFC
       
12" square flat drainage grate - green
12" Square Flat - Green 
Model: DG12SFG
12" square flat drainage grate - black
12" Square Flat - Black 
Model: DG12SFB
12" square flat drainage grate - sand
12" Square Flat - Sand 
Model: DG12SFS
12" square flat drainage grate - grey
12" Square Flat - Gray 
Model: DG12SFC
       
18" square flat drainage grate - green
18" Square Flat - Green 
Model: DG18SFG
18" square flat drainage grate - black
18" Square Flat - Black 
Model: DG18SFB
18" square flat drainage grate - sand
18" Square Flat - Sand 
Model: DG18SFS
18" square flat drainage grate - grey
18" Square Flat - Gray 
Model: DG18SFC
       
9" square atrium grate - green
9" Square Atrium -
Green
 
Model: DG9SAG
9" square atrium grate - black
9" Square Atrium -
Black
 
Model: DG9SAB
   
       
12" square atrium grate - green
12" Square Atrium - Green 
Model: DG12SAG
12" square atrium grate - black
12" Square Atrium - Black 
Model: DG12SAB
   
       
  • Manufactured from structurally foamed High-Density Polyethylene (HDPE)
  • UV stabilized to protect from sun degradation
  • Flat and atrium (domed) profiles
  • Flat grates available in green, black, sand and gray
  • Atrium grates available in green and black
  • Fits 9", 12" and 18" Square Catch Basins
  • Fits 9" and 12" Square Low-Profile Basins
  • Textured anti-skid surface 1
  • Load rated for autos and light trucks at speeds less than 20 mph 1, 2
  • Includes two screw holes to secure to basin3
  • ADA compliant 1
  • Made in the USA

1 Flat grate only

2 Maximum load rating based on basin encased in concrete and weight uniformly applied across entire grate surface.

3 Use #6 1.5" long Phillips flat head stainless screws

 

Fits Open Slot Width Open Surface Area Maximum Flow Rating Maximum Load
9" Square Flat
9" Square Catch Basin (DB9S2)
9" Low-Profile Basin (DB9SLP)
3/8" 38 sq in 50 GPM 2,000 lbs
12" Square Flat
12" Square Catch Basins
(DB12S2 & DB12S4)
12" Low-Profile Basin (DB12SLP)
7/16" 53 sq in 70 GPM 3,000 lbs
18" Square Flat

18" Square Catch Basins
(DB18S2 & DB18S4)

15/32" 92 sq in 120 GPM 4,000 lbs
9" Square Atrium
9" Square Catch Basin (DB9S2)
9" Low-Profile Basin (DB9SLP)
3/8" 31 sq in 40 GPM NA
12" Square Atrium
12" Square Catch Basins
(DB12S2 & DB12S4)
12" Low-Profile Basin (DB12SLP)
7/16" 50 sq in 65 GPM NA