Autotrol (1000406) 12 GPM DLFC Assembly External Drain Flow Control 1" NPT with 3/4" NPT Reducer Three Way Divider 5" carbon block filters fit

5" carbon block filters fit standard big blue housings and are ideal replacements for whole house filtration systems

Fibrillated polypropylene fibers wound in a precise gradient density pattern trap larger sediment particles while maintaining flow

Independent third-party testing ensures consistent performance across production runs

and similar models using safety float assemblies

Built from 100% polypropylene with high dirt-holding capacity and zero media migration

Autotrol (1000406) 12 GPM DLFC Assembly External Drain Flow Control 1" NPT with 3/4" NPT Reducer Three Way Divider 5" carbon block filters fitAutotrol Control Valve Component Autotrol 1000406 External Drain Line Flow Control Assembly 12 GPM DLFC with 1" NPT male and 3 4" NPT reducer for precise backwash drain regulation 12 GPM Rated 1" NPT Male 3 4" NPT Reducer External Drain The Autotrol 1000406 is an external drain line flow control (DLFC) assembly engineered to regulate backwash flow rates in residential and light commercial water treatment systems. This 12 GPM unit threads directly into