This is slightly off topic but the people on Woodworking who post here are very knowledgeable, so I thought i would asked my question here
We live in a house that is 3 years old. The one sink in the upstairs bath room drains very slow some time. I have checked it out and there are not clogs.
It seems like it develops a bubble between the edge of the drain and the plunger. If I fiddle with the plunger the drain burps and everything works well.
Is there some way to prevent this bubble from forming?