"Slow" and "clogged" get used interchangeably, but they describe different stages of the same problem, and knowing which one you're dealing with changes what you should do next.
A Slow Drain Still Drains — Eventually
A slow drain empties completely, just more gradually than it used to. Water pools briefly, then disappears within a minute or two. This usually means partial buildup along the pipe wall — grease, soap scum, hair — narrowing the passage but not blocking it.
A Clogged Drain Doesn't Drain at All
A true clog means standing water that doesn't go down, or only drains a trickle at a time no matter how long you wait. At this point the blockage is substantial enough that DIY methods rarely clear it fully.
Why the Distinction Matters
A slow drain caught early is often a simple, inexpensive clearing — sometimes even resolved with careful maintenance. A full clog, especially one that resists a plunger or store-bought drain cleaner, usually needs mechanical clearing with a cable snake, and if it keeps recurring, may point to a deeper buildup that needs hydro jetting.
When slow is actually a warning sign
If more than one drain in the house is running slow at the same time, that's not a coincidence — it usually means the shared line further downstream is affected, not each fixture individually. That's a main-line issue, not something a single sink's plunger will fix.
What To Do Either Way
A slow drain is worth addressing before it becomes a full clog — it's a much smaller job. A true clog, especially one affecting multiple fixtures, is worth a same-day call rather than repeated plunging that can push the blockage further down the line.
Dealing with a slow or fully clogged drain? Our clogged drain clearing service diagnoses the cause before recommending a fix. Multiple drains slow at once? Read about early warning signs before a full blockage.