If water leaks directly from the drain area when the sink is in use, the cause is usually a worn gasket, loose fitting, or seal failure rather than pipe rupture. Drain leaks often appear only while water is flowing. In most cases, the issue is mechanical and limited to the drain assembly.
The Most Common Reasons
1. Loose Locknut
The drain fitting beneath the sink may loosen.
2. Worn Gasket
Rubber seals compress and deteriorate over time.
3. Improper Installation
Misaligned drain components may leak under load.
4. Cracked Drain Body
Metal or plastic drains can corrode or crack.
Is This Serious?
Minor if:
- Leak only appears while draining
- Drips are small
More serious if:
- Water spreads under flooring
- Leak continues even when not in use
What You Can Do
- Inspect drain assembly
- Tighten connections
- Replace gasket if needed
For related issues:
→ Sink & Drain Problems Explained
→ Why Is My Sink Leaking Underneath?
→ Plumbing Problems Explained