If the sink is clogged and uses a drain pump, the problem could be in the pump itself or in the piping after the pump.
Possible causes
- Accumulation of hair and soap in the siphon
- Obstruction in the pipe after the pump
- Pump blocked by debris
- Check valve stuck
- Electrical pump failure
What to check
- If the pump makes a noise when starting
- If there is water backflow
- If the siphon is blocked
- If the outlet pipe is kinked or blocked
Do not force the pump if there is a blockage - you could burn out the motor.
When to call a professional
If the water doesn't flow even when the pump is running, or if there is a bad smell and constant backflow, the problem could be in the main line.
For diagnosis and safe clearance, the Lisbon plumber company solves clogs quickly with a drainage pump in Lisbon.
