Why does the same drain keep clogging?

A drain that clears and quickly slows again may still contain grease, scale, roots or another obstruction deeper in the branch or main line.

The responsible next step depends on where the problem occurs and what the pipe looks like. Professional cleaning can restore flow, while a camera inspection may be appropriate when the stoppage keeps returning.

Document when the problem happens, which fixtures are affected and whether water rises elsewhere. Those details help the technician select the right starting point.