GETTA Help

Bad smell from a sink drain: causes and checks

Drain smells can come from trapped debris, an empty or faulty water seal, leakage or a wider drainage ventilation problem.

Likely causes

  • Organic residue, a dry trap, loose waste joints or siphoning can allow odours into the room.

Safe checks you can make

  • Run water into an infrequently used sink and clean removable plug components.
  • Check for visible moisture around accessible waste joints without dismantling them.

When to stop and get urgent help

  • Seek help promptly if smells are strong throughout the property, sewage is backing up or anyone feels unwell.

How a plumber can help

  • A plumber or drainage specialist can check traps, seals, waste falls and ventilation.