Typically when it's clogged the U-shaped trap is clogged. Screw off the plastic attachment fittings and remove the trap. Empty it. This drain cleaning service will take care of most sink plumbing problems.
My sink drains slowly or seems to be clogged, what can I do to fix it?
You can first try turning on your hot water and run it for approx. 10 minutes, that should alleviate the problem. If the problem persists you might have a clog in your U-shaped or J-shaped trap. Screw off the plastic attachment fittings and remove and clean out the trap. If that does not help you have a clog in your sewer line. You will need sewer drain cleaning service.
How can I tell if the main sewer line is clogged and not the drain?
If your back up or slow drain is occurring in more than one area of the home, most likely your main sewer line is clogged. One example is if you flush your toilet and your bathtub or shower backs up. For sewer line service you can use commercial drain and sewer cleaner to help with this problem or rooter your main sewer line with a plumbers snake. This is a good long term fix for residential plumbing and commercial plumbing.
Is using a plumbers snake better than using sewer and drain cleaner?
If you have a clog in your main sewer line and want a long term fix, than using a plumbers snake is best. This is even more necessary if you have re-occurring clogs as they maybe caused by heavy debry like hair and grease or even roots that drain and sewer cleaners can't clear. Using strong chemical drain cleaners repeatedly can be harmful to your pipes, and septic system if you have a septic tank.
What can I do about a toilet that keeps clogging or backing up?
If your toilet keeps getting clogged or backing up the most likely cause is that there is an object that was flushed which is stuck in your plumbing. The best solution is to use a toilet auger aka a toilet snake and snake your toilet. This should help your toilet plumbing.
Other Clogged drains, drain cleaning and general advice