During long periods without water use—especially in warm weather—that water can slowly evaporate. If the seal disappears, unpleasant odors may begin drifting into the kitchen.
Covering the drain helps slow evaporation and adds another barrier that keeps odors contained within the plumbing system.
Other Helpful Drain Protection Tips Before Traveling
Homeowners have used similar methods for years to prepare their homes before vacations. Some alternatives include:
- Drain Stopper Method: Place a sink stopper, coaster, or rubber cover over the drain opening to create a seal.
- Baking Soda and Vinegar Cleaning: Pour baking soda followed by white vinegar down the drain before rinsing with hot water to remove food residue and reduce odors.
- Mineral Oil Technique: For longer trips, adding a small amount of mineral oil to the P-trap can create a protective layer that slows water evaporation.
Final Thoughts
My sister’s unusual request turned out to be surprisingly practical rather than overly cautious. Covering a sink drain with an upside-down glass is an easy, inexpensive step that may help prevent pests and unwanted odors while you’re away.
The next time you’re preparing for a vacation, this simple trick might be worth adding to your own pre-trip routine.
