A blocked sink is a common household problem that arises when waste material accumulates in the sinktrap or farther down the drain, causing water to flow back up, and sometimes the sink to overflow. The most common causes of blocked sinks include:

• Fatty and greasy substances that get stuck in the pipes and solidify
• Coffee grounds and food particles that do not break down
• Soap and mineral buildup in the pipes
• Hair and foreign objects that are not disposed of properly

When you identify a blocked sink, the first step is to determine if it is a minor blockage you can deal with yourself or a significant blockage requiring professional assistance. The choice depends on the level of the blockage, the tools and experience you have, and the urgency of needing a solution.