Catch Basins Home » Catch Basins O.D. I.D. OUTSIDE HEIGHT INSIDE HEIGHT WALLS BASE KNOCKOUTS 32" 24" 15" 15" 4" 4" concrete cover 4 - 7"x7.5" 34" 25" 36" 30" 4.5" 6" base 8 - 7"x14.5" 36"x36" 24"x24" 36" 30" 6" 6" base 2 - 10", 2 - 14.5" *64"x64" 48"x48" 44" 36" 8" 8" top 3 - 30"x30" *64"x64" 48"x48" 44" 36" 8" 8" bottom none *Keyed together to form 4'x4'x6' I.D. Catch Basin O.D. I.D. OUTSIDE HEIGHT INSIDE HEIGHT WALLS BASE KNOCKOUTS 34" 25" 36" 30" 4.5" 6" base 8 - 7"x14.5" O.D. I.D. OUTSIDE HEIGHT INSIDE HEIGHT WALLS BASE KNOCKOUTS 36"x36" 24"x24" 36" 30" 6" 6" base 2 - 10", 2 - 14.5" O.D. I.D. OUTSIDE HEIGHT INSIDE HEIGHT WALLS BASE KNOCKOUTS 32" 24" 15" 15" 4" 4" concrete cover 4 - 7"x7.5"