A riser is needed when you want to put your catch basin deeper in the ground to attach to drainage pipes. Riser sits on top of your NDS® catch basin and accepts your grate just like the top of the catch basin.
NDS 1816 Catch Basin Riser for 18 x 18 NDS Catch Basin
SKU: NDS1816 Categories: 18" Catch Basins, Accessories, Catch Basin Kits, Catch Basin Parts, Drainage Parts Tags: Catch Basin, NDS Parts
9 inch x 9 inch, 12 inch x 12 inch, 18 inch x 18 inch, 24 inch x 24 inch