If you do not have access to the cleanout, as you may not have a toilet, skip step one—you’ll need to snake through the top of the drain. In general, drain snakes work the same way.

A plumbing snake, or toilet auger, is the next line of defense when a combinations of methods with plungers and cleaners haven’t done the trick. It’s a great commercial drain cleaning tool ...

“We can usually determine the culprit depending on what type of drain is clogged,” says Docia Boylen, the owner of Handyman Connection. • Toilets: “With a toilet, the No. 1 one thing ...