Hydro Guard 4-Stage RO Filter Replacement Kit Including Membrane for HDGT-45 Reverse Osmosis Drinking Water System, Complete Annual Filter Refresh Bundle

["Complete Hydro Guard HDGT-45 RO Filter Replacement Kit: Includes HDGT-SED5 (Stage 1), HDGT-CB5 (Stage 2), HDGT-TW50 50 GPD membrane (Stage 3), and HDGT-CB5P post-carbon filter (Stage 4).","Tool-Free Twist-and-Lock Installation: All Hydro Guard replacement filters in this kit use the quick twist-on design — no tools, no plumber, and no special plumbing experience required for annual service.","Genuine Hydro Guard Filters: Hydro Guard filters use the right media for each job — melt-blown PP at Stage 1, activated carbon block at Stage 2, TFC membrane at Stage 3, and GAC at Stage 4.","Full Replacement Schedule Covered: Pre-filter and post-carbon stages replace every 6 to 12 months. The HDGT-TW50 RO membrane replaces every 24 months. All four stages included in this kit hydro guard filters hdgt-cb5p replacement.","Designed for Hydro Guard HDGT-45 Reverse Osmosis Systems: Fits HDGT-45CP, HDGT-45CP38, HDGT-45BN, HDGT-45BN38, and HDGT-45CP-P. For a kit without membrane, see YS-HDGT-45."]