One line, many fixtures
How your sewer line affects the whole plumbing system
Sinks, tubs, showers, toilets and appliances all drain into the main sewer line. When that line starts to clog, the effects are not limited to one fixture. Several drains may slow together because wastewater cannot leave the property efficiently.
That pattern is the main difference between a sewer concern and an ordinary clog. A single slow sink usually involves its own branch line; water rising in a tub when a toilet is flushed suggests the restriction is further down. Note which fixtures react together before you call.
