Just remove the 5 micron carbon block filter in the system and use this carbon stage instead

3) Y's to split the filtered water in line

Buy this resin in BULK quantities

Standard Features  This is a 20 inch slim line filter housings

5.2 Gallon RO Pressure Tank - NSF TDSMonitor/Alarm Just remove the 5 micron5. 2 Gallon NSF RO Storage Tank Details NSF certified 5. 2 gallon drinking water pressure tank. Black stand in picture is included. PLEASE NOTE! The Tank ball valve in picture is NOT included in default selection, ***Please select the optional 1 4 (standard) or 3 8" tank ball valve when configuring your tank above.*** Standard Features 5. 2 gallon NSF certified reverse osmosis pressure tank, hydro pneumatic bladder and captive air tank are all common