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r/Plumbing Show all Method Description Hot Water & Salt Dissolve 1 cup of salt in a gallon of hot (not boiling) water. The salt lowers the freezing point of the ice, aiding the melting process. Baking Soda & Vinegar Pour 1/2 cup of baking soda followed by 1 cup of vinegar. The resulting chemical reaction creates bubbling agitation that helps break up the ice mass. Indirect Heat Use a hair dryer or heat gun on a low setting directed at the trap. If the trap is in a crawl space, a space heater placed nearby (never unattended) can also work. Shop Vac Use a wet/dry vacuum to remove standing cold water from the shower before applying hot water treatments. This ensures the heat reaches the ice directly rather than being cooled by standing water. Preventive Strategies Insulation
Frozen lines can interfere with normal ventilation, forcing sewer or musty smells back into the bathroom. frozen shower drain