Gravity operated—provides a full 15 minutes of flushing at 0.4 gpm. Features - Wide opening & threaded cap for easy inspection, cleaning, & filling - FDA-approved, high-density green polyethylene tank w/ handle - Mounting bracket - 9 gal capacity - 14 1/2"H x 22"W x 10 1/8"D - Meets ANSI Z358.1 - 1/Each