If all other sink & toilet drains are open, the blockage is probably local.

• check the stopper for accumulations of hair, soap & other foreign material. If a plain rubber stopper is used the accumulation is probably on the grate in the drainpipe just below the stopper. Proceed as described for slow emptying lavatories
  
  
  
• some mechanical stoppers can just be pulled out, others can be lifted, turned & raised, still others require disassembling the unit. Take the stopper out & remove all hair & foreign material
  
  
  
• if the stopper will not come out you have a more difficult problem. Remove the trap below the sink. Also remove as much of the pipe to the bowl as possible. Now w/ a wire w/ a short hook, clean the hair out by working both from below & above the sink
  
  
  
• after the bowl drain is free, remove the bottom of the trap below the lavatory by turning the two large nuts. The nuts are on the pipes to so turn them counterclockwise as you look at them from the pipes. Be sure to put a bucket under the trap to catch the water which accumulates in the trap. Clean out the trap w/ hot soapy water
  

Plumbing Tools & Materials • 12" slip joint pliers • rubber gloves • small bucket • teflon thread compound • teflon tape • 1-1/2" p-trap w/ slip joint nuts,washers

Difficulty: Intermediate

Repair Time: 1-2hrs

Advice by Friendly Plumber ® • If you run into problems & repair time exceeds 1-2 hours, cut your losses & call a professional plumber instead