Clearing blocked drains without using chemicals
 

I saw this method on television recently and although I have not tried it, it seems a good idea since it is treating the blockage without using chemicals.

You will need:
A half a cup of baking soda
A half a cup of white vinegar
A kettle full of boiling water

First pour the baking soda down the drain, then add the white vinegar and let it set for about 5 mins and then pour boiling water down the drain after it...according to the method, it should clear the drain.

Just thought I would pass tip on.