Boiling water flush.

Flushing a drain with boiling water is a simple method that can be effective for minor clogs caused by grease or soap buildup. The high temperature of boiling water can melt and dissolve these substances, clearing the drain. However, caution is advised, especially with PVC pipes, as excessive heat can potentially damage them. This method is best suited for drains that are only partially blocked and for clogs suspected to be composed of grease or soap.