Before you start fixing the problem, it's crucial to confirm that your main sewer line is indeed clogged. Look out for these common signs:

Dealing with a Backup: How to Unclog a Main Sewer Line A clogged main sewer line is more than just a nuisance; it’s a plumbing emergency. Unlike a simple sink clog, a main line blockage affects every drain in your house and can lead to raw sewage backing up into your tubs and showers.

If you suspect a slow drain due to grease or organic buildup (and not a solid obstruction like a tree root), harsh chemical drain cleaners often do more harm than good. Instead, use an enzymatic cleaner.

Before you start digging or snaking, confirm the symptoms. A main line clog usually presents multiple issues simultaneously: