What is the base of your irrigation system?
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Use with 18" x 18" Catch Basin Series. Riser package includes 4 sides. Use with NDS-1800 or NDS-1804 catch basins. **Assembly requred**
** BEFORE installing a drainage system, please check your local codes and regulations and install accordingly. **
8" Riser for 18" x 18" Catch Basin.
To learn more about general drainage and catch basin installation, please watch the videos below: