FREE Shipping!  Filter Replacement Set for Environmental Water Systems ESSENTIAL Drinking Water System Item No. Included in This Set: F-PRESED, F-GAC, F-GAC-B Description: 5 micron pre-sediment filter, advanced granular activated carbon filter, advanced carbon block filter Replacement Schedule: up to 1 year, not to exceed 1 year Special Note: EWS uses full-size, USA-made, full bed depth, highest-grade filters for optimum performance and longer life     Made in the USA from USA-Made Parts