Short answer: The main drain is the line that carries wastewater from every fixture in the house toward the sewer connection, and a blockage there tends to affect more than one fixture at once rather than just a single sink or tub.
The main drain is easy to overlook because it's usually out of sight — but when it clogs, the effects show up everywhere at once. Multiple slow drains, gurgling in more than one fixture, or backups in the lowest drain of the house are all signs pointing to the main line rather than a single fixture.
Because the main line carries everything, clearing it usually calls for a longer auger or hydro-jetting equipment rather than a basic hand tool.
Signs You May Need This Service
- Multiple drains backing up at the same time
- Gurgling from the lowest drain in the house when others run
- Sewage odor in the yard or near a cleanout
- Unusually green or lush patches of grass over the sewer line
What the Service Typically Involves
- Camera inspection of the main line to locate the blockage or damage
- Clearing roots, grease, or debris from the line
- Evaluating whether a section needs repair or full replacement