Fix A Running Toilet
Drain Repairs
If you have a moderately clogged drain, try this homemade drain cleaner: Pour 1/2 cup of baking soda down the drain followed by 1/2 cup of vinegar. Be careful. The two ingredients interact with foaming and fumes, so replace the drain cover loosely. Let the concoction set for about three hours before running water.
If you know the slow drain is from grease, try this treatment: Pour in 1/2 cup of salt and 1/2 cup of baking soda followed by a teakettle of boiling water. Allow to sit overnight.
You can keep your drains clog-free and odorless by using the following homemade noncorrosive drain cleaner weekly. Combine 1 cup baking soda, 1 cup table salt, and 1/4 cup cream of tartar. Stir ingredients together thoroughly and pour into a clean, covered jar. Pour 1/4 cup of mixture into drain, and immediately add 1 cup boiling water. Wait 10 seconds, then flush with cold water. Flushing weekly with a generous amount of boiling water also works well.
from http://home.howstuffworks.com/home-improvement/plumbing/how-to-unclog-a-drain.htm
