If the above methods don't work, you can try using chemical drain cleaners. However, be cautious when using these products, as they can damage pipes and harm the environment.
Follow this guide to safely unblock your frozen drain before the ice expansion causes a costly rupture. Step 1: Identify and Locate the Blockage how to unblock a frozen drain pipe
Salt lowers the freezing point of water, making it a potent de-icer for traps and drain lines. BRPI Mechanical If the above methods don't work, you can
A plumber may use: