Filter is tested and certified to NSF/ANSI standards 42 and 53 for the reduction of PFOA and PFOS; two prevalent PFAS chemicals, lead, Class 1 particulates, cysts and chlorine taste and odor Filter is tested and certified to NSF/ANSI 401 for the reduction of microplastics. Filter should be replaced every 2,250 gallons; expires 1 year after installation Vandal-resistant enclosure made from 20-gauge stainless steel to protect filter and discourage tampering; Torx bit included for added security Versatile mounting near accessible water line; box includes conduit punchouts on sides and bottom and an open back for thru-wall plumbing; vandal-resistant conduit not provided; Universal box works with Elkay and non-Elkay units to turn any non-filtered cooler or fountain into a filtered unit; LED filter status monitor and audio alert indicate when filter replacement is needed