Not Available Not Available Drainage System Overview Catch Basin Installation
NDS-991 Green 9" x 9" Atrium Drainage Grate: Use with 9"x9" Catch Basin Series. ** BEFORE installing a drainage system, please check your local codes and regulations and install accordingly. ** Specifications 9" Structural Foam Polyolefin Dome Atrium Grate with UV inhibitor. Open surface area 31.50 square inches. 41.27 GPM. To learn more about general drainage and catch basin installation, please watch the videos below:	*Note: All dimensions are nominal. NDS 9 Inch Atrium Drainage Grate Models: NDS-981 Black 9" Atrium Drainage Grate NDS-991 Green 9" Atrium Drainage Grate Compatible Catch Basin & Riser Models: NDS-900 9" x 9" Two-Outlet Catch Basin NDS-900-4 9" x 9" Four-Outlet Catch Basin NDS-916 9" x 9" Bottomless Catch Basin Riser