Summary: Household drains often become clogged without much warning and if you procrastinate, not only will the slow drain frustrate family members, but it could get worse. Just knowing what to do often has the problem half-licked before you even start.
The kitchen and bathroom sink traps are the usual locations in most homes that get clogged. In the bathroom, the problem is often due to hair, waste products, threads from fabrics washed or rinsed in the bathroom sink. In the kitchen, it can be from dish cloth threads, food particles, trimmings from greens, meat grease build up and other chance residues. In the laundry room, the utility sink could get clogged from just about anything from sand to sawdust to paint chips, depending on what someone decided to wash or rinse out from the garage or workshop. If you live in an area with "hard" water, lime deposits can form. All of these substances may build up over time and cause an obstruction that slows or stops the flow completely
To read the rest of my article:
http://www.diystuff.com/Drainage/How_to_Clear_a_Clogged_Drain.shtml
[Due to copyright agreement, I am unable to post my article here in its entirety.]
