In that case the first place where the air can leave is the vent but if the vent is clogged that means that the air will exit through the sink drain.
Washing machine drains into kitchen sink.
If you have this problem here is video to show how to easy do the job yourself.
I d definitely recommend being nearby when you re running this setup i usually wandered back into the room when it was draining to check on it and i never.
The output from a washing machine is under pressure and a standard 1 1 2 inch sink p trap assembly is too small to handle it.
When the washing machine pumps water up into the sink the smell is not to goo.
This means that when the washing machine starts releasing water down the drain that is connected to the sink drain the air will actually be trapped inside the main drain pipe.
Both drains may empty into a toilet waste line and be.
Why does this happen.
They both often tie into a waste line extending from a toilet to the main soil stack or directly to the.
It s common for the washing machine to share a drain with a sink and if the laundry room is near the kitchen it could be the kitchen sink.
It isn t unusual for the washing machine to share a common drain with a sink.
This means they combine at some point on the way to the main sewer line.
Overall the sink seems to give you enough buffer capacity to keep up with a washing machine draining.
To start with know that your sink and washing machine drain lines tend to run congruent to each other.