Why Does My Sink Drain Smell Like Rotten Eggs?

1. Dormant Drain Lines

Every drain in your home has a trap—a U-shaped pipe filled with water—that prevents harmful sewer gases from entering your living space. If you haven't used a particular sink or drain in a while, this water may evaporate, paving the way for unwanted gases.

Solution: Regularly run water in infrequently used sinks or drains. This simple action replenishes the trap, sealing off any sewer gas.

2. Absence of a Drain Trap

When you've recently installed or renovated a drain system, it's crucial to ensure a proper trap has been fitted. Without it, there's nothing blocking the sewer's odors from permeating your home.

Solution: RooterPLUS! recommends getting a certified plumber to inspect and, if needed, install the right trap.

3. Greasy Drains—A Culprit

One prevalent reason behind that rotten egg or moldy odor in kitchen sinks is trapped grease. When solidified, grease adheres to the sides of your drains, and as it breaks down, an unpleasant smell ensues.

Solution: Pour a few teaspoons of baking soda followed by vinegar into the drain. After the reaction, flush it out with boiling water. This homemade remedy can clear and deodorize your drain.

4. Grime in the Garbage Disposal

Leftover food particles clinging to your garbage disposal's blades can smell foul. RooterPLUS! advises that you continue running water over the disposal for around 30 seconds post grinding. If there's an existing odor…

Solution: Grind some ice cubes in the disposal—it can dislodge residual food. For a fresh aroma, add a few slices of lemon or orange.

5. Blocked Plumbing Vents

A clogged plumbing vent can redirect the sewer stench back into your dwelling. Look out for obstructions, such as bird nests or debris.

Solution: Carefully remove any obstructions and consider fitting screens for preventive measures.

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