Fill both sinks with a few inches of water, then pull both plugs. If water drains slowly from both, the clog is deep in the common trap or main line. If only one side drains poorly, the blockage may be near that sink’s individual strainer.
A double sink requires sealing the opposite drain to create proper suction. Use a wet rag or a second plunger pressed firmly over the unused drain. Then plunge the clogged side vigorously for 20–30 seconds. The trapped air forces pressure through the shared pipe. how to unclog double sink
Liquid chemical drain cleaners can damage old metal pipes and are ineffective against full clogs. Also, never pour boiling water directly into a porcelain sink—run the hot tap first to avoid cracking. Fill both sinks with a few inches of
Place a bucket underneath. Unscrew the curved trap beneath the sink (hand-tight nuts usually need no tools). Clean out the sludge, food particles, or tiny utensil that fell in. Reassemble tightly. A double sink requires sealing the opposite drain
Feed a ¼‑inch snake through the drain opening past the trap. Crank it to break up or retrieve the clog. For garbage disposal clogs, use the hex key (Allen wrench) in the bottom of the unit to manually rotate the blades.