ADS 2715AG15N Nyloplast® 15" x 15" Inline Drain with Grate - Nyloplast® Inline Drains are designed to enter a storm drain line using a tee or elbow and a riser pipe. They represent the latest in storm water piping technology and their innovative combination of performance proven ductile iron grates with a rugged PVC structure makes them unique in the surface drainage industry. The product is lightweight and easily handled which translates into faster installation with less equipment and personnel.