Green Gobbler Main Line Drain Opener and Toilet Bowl Clog Remover is the only liquid drain opener with the power to clear main line drains from the home out to the sewer or septic system. No need to call a plumber, just pour Main Line into the lowest level toilet bowl. Clears toilet bowl clogs too! Thicker, clinging formula grabs debris on the main Line pipe perimeter and stays in the pipes longer for maximum penetration and performance. Eco Friendly formula acts as a safe replacement to traditional main line drain openers. Dissolves: Grease, Hair, Paper, Oil, Soap Scum. Formula clings to Pipes to keep working. Safe for septic systems.