Fight fully blocked drains and protect pipes with the triple action formula of Liquid-Plumr Pro-Strength Full Clog Destroyer plus PipeGuard. This easy to use Full Clog Destroyer has a powerful triple action formula that pours through standing water to unblock full clogs, protects pipes and keeps pipes clog free with regular monthly use. - Works fast to clear fully clogged drains with standing water and slow drains - Removes hair, gunk, grease and soap scum - Safe for all pipes such as PVC, plastic, copper and old pipes - Works with septic systems and garbage disposals as well