10" Filter Housing Replacement Kit - 3 Filter Housings w/Fittings For RO Systems, Drinking Water System, and all 10" x 2.5" Filters Works with drinking water systems, RO systems, and RO/DI systems Includes 3 filter housings, 2 hex nipples, and 2 1/4" quick connect elbows To prevent system failure, housings should be replaced EVERY 5 YEARS