Mechanical push button designed for use in limited wall depth applications, for areas where electric is not available. Fill rate is 1.5 GPM. Visual filter monitor with LED filter status indicator for when filter change is necessary. The 500-gallon filter is certified to NSF 42 and 53 for lead, Class 1 particulate, chlorine, taste and odor reduction. Green Ticker informs user of number of 20 oz. plastic water bottles saved from waste.