Preparing your home before leaving on a long trip can feel like a daunting checklist—locking windows, setting timers, and turning down the thermostat. However, unusual household advice often spreads across social media, leaving homeowners scratching their heads.
One viral trend shows a kitchen sink drain covered with a sheet of paper or paper towel and an inverted glass weighted down on top. The caption often asks: “My in-laws told me to cover my sink drain with a piece of paper and place a glass upside down over it before vacation. Why?”
Below, we break down the logic behind this trick, evaluate whether it actually works, and share essential home prep tips before heading out of town.
The Real Intent Behind Covering Sink Drains
While placing paper and an inverted glass over a drain might look like an odd superstition, it originates from two very real home maintenance concerns:
1. Stopping P-Trap Evaporation & Sewer Gas
Under every sink, a U-shaped pipe called a P-trap holds a small barrier of standing water. This water seals the pipe, preventing sewer odors and gases from rising into your kitchen.
If a sink remains unused for several weeks—especially in dry or hot climates—that water barrier can evaporate. Covering the drain opening creates a physical seal to trap moisture and block sewer gases from venting into your empty home.
2. Preventing Pests and Sewer Flies
Stagnant plumbing pipes can serve as an entry point or breeding ground for drain flies, fruit flies, or sewer insects. Sealing the opening blocks bugs from crawling out into the sink basin while you are away.
Does the Glass & Paper Method Actually Work?
While the concept makes sense in theory, using paper and a glass is not the most effective solution:
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Paper Absorbs Moisture: Standard paper or paper towels absorb water quickly, which can accelerate evaporation rather than preventing it.
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Lack of an Air-Tight Seal: A glass resting on paper does not form an airtight or rubberized seal around the drain perimeter.
A Better Alternative
Instead of paper and glass, simply use a rubber sink stopper, a silicone drain cover, or pour a tablespoon of food-grade mineral oil into the drain. The oil forms a thin layer over the P-trap water, preventing it from evaporating for months!
4 Essential Plumbing Checks Before You Go on Vacation
To avoid coming home to unexpected leaks or plumbing issues, add these quick steps to your pre-trip routine:
1. Turn Off Main Water or Appliance Valves
For peace of mind during extended trips, shut off the main water valve to your home or turn off individual supply valves behind toilets and washing machines.
2. Clear Out the Garbage Disposal
Run cold water and grind a few ice cubes with lemon peels through your garbage disposal to clear lingering food particles that could cause odors while you are away.
3. Check Outdoor Hoses
Disconnect outdoor garden hoses from spigots to prevent pressure buildup in your home’s water lines.
4. Set Your Water Heater to “Vacation Mode”
Lowering your water heater thermostat reduces unnecessary energy consumption while keeping the system safe.
Conclusion
Covering your sink drain before heading on vacation comes from a good intention—keeping sewer odors and pests out of your home. While the paper-and-glass trick is a popular quick fix, swapping it for a rubber stopper or silicone cover is a much cleaner and more reliable way to protect your kitchen while you enjoy your trip!
Frequently Asked Questions (FAQ)
Will my sink drain dry out if I leave for a one-week vacation?
Usually, no. It takes several weeks to a month of zero use for the water inside a standard P-trap to fully evaporate, depending on your home’s humidity and indoor temperature.
How do I eliminate bad smells from a sink after coming back from vacation?
Simply run cold tap water for $30\text{ to }60\text{ seconds}$ to refill the P-trap, then flush the drain with warm water and baking soda to refresh the pipes!
