Liquid-Plumr 128 Oz. Pro-Strength Clog Destroyer Drain Cleaner

Patented gel with Pipe Guard is the most powerful to penetrate and dissolve clogs. Works fast to clear fully clogged drains with standing water and slow drains. Removes hair, gunk, grease, and soap scum. Safe for all pipes (PVC, plastic, copper, old pipes), septic systems, and garbage disposals. Contains no phosphorus.