Drain Line Flow Control Assy (New/Current Style with 1/2" Male Thread) Centuri Older models may have a

Older models may have a bypass with black plastic knobs--this bypass valve is a direct replacement for that one

This will replace all of the electrical components of any Isobar III softener or filter except for the Sidewindr

If your injector assy has a check ball on it as shown

Complete Drain Line Flow Control (DLFC) Assy

Drain Line Flow Control Assy (New/Current Style with 1/2" Male Thread) Centuri Older models may have aComplete Drain Line Flow Control (DLFC) Assy. This is the current style, which was introduced mid 2022, but can be used on earlier Signature 3 units as well. Includes: Flow control housing with 1 2" male NPT threads O rings 1 2" NPT x 1 2" barbed drain line elbow fitting Retainer Clip Flow control button (select size)* *If you aren't sure which size flow control button you need, check the sticker on your injector cap, and it should specify a "DLFC"