How to unblock a sink
Why is the water backing up in my sink?
A blocked sink is a common problem which is caused by a build-up of everyday debris and food getting caught in the pipe below the sink (known as “the trap”). A blockage can usually be fixed with a plunger, a blaster cup, a plumber’s snake, or a chemical drain cleaner. If a larger object has become wedged in the pipe, then you’ll need to remove the blockage manually.
How can I prevent sink blockages?
Although sink blockages are bound to occur from time to time, you can help prevent them with some preventative actions. Certain food and drink wastes, such as oils and coffee grounds, should be carefully disposed of rather than washed down the plughole. And regularly rinsing the pipes through with some soda crystals and hot water will help keep them free from blockages. A cup of white vinegar poured down the plughole works equally well.