
Is Drano Bad for Pipes? a Vancouver Homeowner’s Guide
Chemical drain cleaners like Drano are generally safe for sound PVC and metal pipes when used exactly as directed on a slow drain, but they become a bad fit on older copper, ABS, or mixed-material lines and on fully blocked drains where the chemical can pool and concentrate heat on one spot. In Canada, Drano's guidance says its clog removers work in 15 minutes for clogged or slow-running drains, or up to 30 minutes for tougher blockages, followed by hot-water








