A blocked sink is caused by a build-up of materials that prevent water from flowing through the pipes. Common causes include food waste, hair, soap residue, and foreign objects. These materials eventually accumulate in the pipes leading to the sink, causing the blockage.

The effects of a blocked sink can be frustrating and even dangerous. Water will not be able to flow freely, leading to a buildup of stagnant water that can attract bacteria and lead to foul odours. Water can overflow from the sink, potentially causing water damage to other areas in your home, such as your floors or cabinets.