The next step is to remove the sink trap. Once you get to this phase, you need to make certain you have a bucket and a towels close by. Before removing the trap, make sure to drain as much of the sink water as you can. Place the bucket under the trap and loosen the connection to the portion of the pipe leading down from the sink to the trap.  If the remainder of the water drains down from the sink, you will then know that your clog if further down the line. If the water does not drain, then you need to check the section between the trap and the sink for the clog. A metal clothes hanger is sufficient to check and clear any blockages found.

 

Next, check to see if there are any obstructions in the removed trap. Either take it to another sink and see if water flows through it unobstructed or use a length of clothes hanger to check for any blockage. If the sink and the trap are clear,
you will need a plumber auger.If you don't have an auger you can rent one at your local tool rental store for a resonable cost.

 

Push the auger into the pipe until you encounter a blockage. If you are using a manual auger, you will have to twist it in order to get around turns in the pipe. Once it reaches the clog, you twist it repeating as many times as necessary to remove the clog.

 

Using these steps will clear most clogged drains.