1. If the sewer in the sink is blocked, don't panic first, turn off all water pipes to prevent more water accumulation, and then check whether the sink in the kitchen is blocked. The sewer pipes in the sink are mostly U-shaped.
2. If there is a drainage screw on the water pipe at home, we just need to unscrew this screw directly, but if there is no drainage screw on the water pipe, we can skip this step.
At this time, we can prepare a chopstick, or a wire can pass through both sides, so that the sewer in the kitchen sink can be dredged.