Adjust your thermostat.
Water indoor plants or arrange for someone to do so.
Stop mail or have a neighbor collect it.
Small preventive measures can help you avoid unpleasant surprises when you return.
Should You Cover Every Drain?
Some homeowners cover more than just the kitchen sink.
If you’ll be away for several weeks, you might also consider covering:
Bathroom sinks
Utility sinks
Laundry room drains
Floor drains
Again, this isn’t always necessary, but it can provide extra protection in homes where drains occasionally produce odors.
Common Myths About the Glass Trick
Myth 1: It Stops All Sewer Gas
Not entirely.
A properly functioning P-trap remains the primary defense against sewer gases.
Myth 2: It Eliminates Plumbing Problems
No.
If your plumbing system has underlying issues, covering the drain won’t fix them.