Hearth & Home 2166-338 Control Module IPI 30 Black Brand_Pit Boss The only difference is the

The only difference is the bottom thread — 1-1/2" on that one

Dichlor is the chlorine specifically formulated for hot tubs

chemically active water

Contains 30% Polymer Algaecide

Hearth & Home 2166-338 Control Module IPI 30 Black Brand_Pit Boss The only difference is theHearth & Home 2166 338 Control Module IPI 30 Black Overview The Hearth & Home 2166 338 Control Module IPI 30 Black is a factory original replacement component designed for use with select Hearth & Home Technologies gas fireplace systems featuring the IntelliFire Plus (IPI) ignition system. This advanced control module coordinates the operation of critical fireplace functions including ignition, flame sensing, fan control, and safety shutdowns.