NDS-11 Black 4 Inch Round Flat Grate:
Fits 4" Sewer and Drain Pipe & Fittings, 4" Corrugated Pipe, and 4" Triple Wall Pipe. If installaing in a flower bed, use an atrium grate to avoid clogging debris. Atrium grates should be used in areas where there is no traffic.
** BEFORE installing a drainage system, please check your local codes and regulations and install accordingly. **
To learn more about general drainage, please watch the video below: