Includes four grates only and
vented riser rings for ¾" deep retro-fits.
Fits: AquaStar (standard 18" square frames) American (Pentair) with
¾" deep existing window grid frame and 4×4 screw hole pattern. Floor Flow Rating: 740 GPM @ 1.5 fps. . Wall Flow Rating: 740 GPM @ 1.5 fps. . Sump Depth: 6″ minimum.