Drano, 17 OZ, Dual Force Foamer Clog Remover, Serious Clog Buster, Deep Cleaning Foam Purges Pipe Walls Of Hair & Gunk & Attacks Places Ordinary Liquids Can't Reach, Safe For All Pipes & Septic Systems, Fills The Whole Pipe, Attacks Clogs That Ordinary Liquids Cannot, Keeps Drains Clear Longer, Effective On Kitchen & Bathroom Clogs, Helps Clean Garbage Disposals.