Product reviews for Drano Overnight Liquid Drain Cleaner 32oz Safety Cap Bottle 12Ctn 

For more than 20 years, Drano Liquid Clog Remover has been a reliable, cost saving solution to the problem of blocked drains. Simple to use and safe for all pipes. Works on both kitchen and bathroom clogs. Starts working to break down clogs on contact. After 15 to 30 minutes, clogs are substantially minimized or dissolved. A final blast of hot water flushes away what's left of the clog. Contains a special ingredient to protect pipes from corrosion. Safe for plastic, PVC, metal pipes, garbage disposals and septic systems. Won't harm pipes when used overnight. Does not contain phosphorus. Commercial grade.