Use 3rd Grade Science to Unclog Your Drain
Rather than pouring a veritable cocktail of chemicals down your drain, use a couple of kitchen (or science experiment) supplies and a pot of boiling water to get things flowing smoothly again.
Here are the step-by-step instructions:
1. Pour 1/2 cup of baking soda followed by 1/2 cup of vinegar down the clogged drain.
2. Cover the drain with a wet cloth for 5 minutes.
3. Remove the cloth and flush the drain with steaming-hot water.
A wet cloth is the only thing covering the drain, it won't build up enough pressure to burst a pipe. The worst it would do is push the wet towel out ot the way. The first thing you have to do is get the water out of the sink. Use a cup or bowl untill most of the water is out, then use either a wet-vac or soak it up with towels.
... How do you get to the clog if you have 3 or 4 inches of water in the sink ?...
...God Bless America... AGAIN !
I have used the baking soda and vinegar routine on the drain as well. It ~does~ work, but it still makes sense to try to prevent the clog in the first place.