A sink full of slow draining water, or even worse, no drainage at all, is a sure sign of blocked pipes. Blockages are due to all those scraps of food and crumbs that get down the plug hole everyday. Yuck. Watch this video tutorial to learn how to unblock a sink. You will need a good sink plunger, an adjustable wrench, a bucket, a strong wire, gloves and some disinfectant to finish up.