[header] How to plunge a sink [title] Fill the sink with enough water to completely cover the rubber part of your plunger. [step] If your sink already contains more water than you need to cover the plunger, there is no need to remove the excess water. [title] Remove the pop-up drain stopper, if your drain has one. 
[step] Some drain stoppers can be removed by unscrewing them from the top. Others need to be disconnected from the pivot rod, which is located under the sink.