Common Drain Lines. The sink and washing machine may have the same drain pipe in many homes. The gurgling sound is caused by air being forced back through the sink's drain when the washing machine overflows the common drain line with water.
If the drain line is small or partially obstructed relative to the amount of water being drained, this is more likely to occur.
Identifying the Problem. You must identify the underlying cause of the gurgling sound in order to properly handle it. Here are some actions that you can do:
Examine any obvious obstructions. Check for any obvious obstructions in the drains of the washing machine and sink.
Debris clearing out of the drains might occasionally solve the issue. Minor obstructions can be cleared with a drain snake or plunger.
Examine the roof where these pipes usually extend if you think there may be clogged vent pipes. Make sure there are no leaves, dirt, or bird nests blocking them.
Restoring the system's ideal air balance may be aided by cleaning the vent pipes.