$ETII Activate™ WST acts to remove buildup grease and soil deposits in the piping, traps and “T”s in your home and business plumbing systems. This proprietary solution from ETI immediately begins breaking down the surface tension bonds that lets oils and soils attract and hold to each other and plumbing surfaces. This immediate and constant “cleaning” process allows the materials to separate and washed through to the septic tanks and drain fields.