One of the first and easiest things you can do is simply flush your drain with a pot of boiling water. It's not guaranteed to unclog physical or grease blockages, but if you have a slow drain that you think is due to a light or small blockage, a good boiling water flush can clear it out with minimal effort.Jul 26, 2011
Do NOT pour boiling water down your sink or toilet.
This can melt PVC piping and pipe seals, causing serious damage. In addition, using boiling water to clear a clogged toilet can melt the wax ring around the toilet, or even crack the porcelain bowl, leading to a pricey trip to your favorite hardware store.Jan 2, 2018
Internet advice 😀