The Deluxe/Commercial Septic Tank Filter from Zoeller is designed to improve the performance of septic systems and help protect lateral fields from clogging. One hundred percent of the filter area is below the outlet; therefore 100 percent of the filter area is used. Providing 488 linear feet of 1⁄16-inch filtration, this septic tank filter offers a maximum flow rate of 4,000 gpd. Constructed to meet state and local plumbing codes, the filter can be used for residential or commercial filtering applications. For residential applications, it is certified to ANSI/NSF Standard 46. Zoeller Pump Co., Card No. 12