OneFlow + Salt-Free Scale Prevention and Water Filtration System Rated most effective scale prevention technology (TAC - Template Assisted Crystalization) Save up to $300 annually Environmentally friendly - no wasted water, no drain required Virtually maintenance free High Capacity Easy installation Includes housing and head assembly, OneFlow scale prevention filter cartridge, radial flow carbon block filter cartridge, inlet/outlet red adapter locking pins (2), 1-inch NPT inlet/outlet adapters (2), outlet connector, multifunction tool