Genuine OEM Bissell Washable replacement filter designed to fit Bissell Powerlifter, and Powerlifter Pet models. This HEPA cartridge filter is located at the base of the machine, beneath the dust cup assembly. Bissell recommends washing this filter once every 30 days, and depending on your household, your should be replacing your vacuum filters every 3 to 6 months or when performance begins to decline; and more often if you have pets that shed and family/friends that track in dirt and debris. Fits Powerlifter Pet models; 1309, 1307, 1309R, 1309W. It's important to use genuine Bissell filters to ensure peak performance, and maintaining the manufacturers warranty.