Square, retrofits most brands existing 9”, 12” or 18” deep frame. Complete with cover, vented riser ring and mud frame. Fits AquaStar standard 9’, 12” square, Pentair® #1 selling sump with 3/4” deep existing frames and four screws. For single and multiple drain use see installation instructions. 5 Year Life from the Date of Installation All AquaStar® covers are trademarked VGB. Compliance button can easily be identified as VGB compliant on the cover from on deck and underwater. They are also manufactured from superior UV-resistant engineered polymers and all components (cover, sump and screws) meet or exceed ANSI/APSP 16-2011 and NFS/ANSI 50-2009a national standards and ASTM G154 UV testing exposure. Select Grate Size Above: WAV9WR101 - 9” Open area 48.4 sq. in. Floor/wall 224 gpm @ 1.5 fps WAV12WR101 - 12” Open area 90.8 sq. in. Floor/wall 424.5 gpm @ 1.5 fps WAV18WR101 - 18” Open area 176.9 sq. in. Floor/wall 826.6 gpm @ 1.5 fps