The Eliminator Two Service flow rate: 15 gpm at 16 pound loss, same as a one and a half cubic foot, 48,000 grain capacity water conditioner. Two – 4 1/2″ x 20″ housings with pressure release valve. One – KDF 55 media filter. One – Carbon media filter. One – Mounting bracket. One – Spanner wrench. Treats up to 110,000 gallons of water before filter replacement is needed, for a family of four this is at least 1 1/2 years of usage before changing the filters. No electricity, Chemicals, salt or backwashing needed.