After you pour Drano Dual-Force Foamer into a drain, the two ingredients combine to form a powerful foaming clog remover. The foaming action fills the pipe and thoroughly clears its walls, dissolving gunk. A blast of hot water flushes away what’s left of the clog.Effective drain cleaning that won’t harm your pipes or septic systemsHelps clean garbage disposals and leaves them smelling freshFills the whole pipe, reaching clogs that ordinary liquids can’tEffective in both the kitchen and bathroom