Follow the manufacturer's label, but the general process is:
For minor grease-related buildup, a large-scale application of baking soda followed by boiling water and vinegar can sometimes help loosen debris. While not as "powerful" as industrial chemicals, it is a safe first step for DIY maintenance. 3. Safety Precautions and Risks how to unclog a sewer line with chemicals
If the drain clears, congratulations. Run the water for a full five minutes to ensure all chemical residue is flushed out of your home's trap and into the municipal sewer. Follow the manufacturer's label, but the general process