The Real Deal on Covering Your Sink Before Vacation: The Truth About the “Upside-Down Glass” Hack (And How to Actually Protect Your Home)

a “U” shape before going into the wall. That is called a P-trap. Its entire job is to hold a small pool of water.

That little pool of water acts as a physical, liquid seal. It is what blocks heavy, smelly sewer gases from floating up the pipe and into your bathroom or kitchen. It also blocks drain flies and bugs.

Why the Glass Hack Fails

Placing an upside-down continue reading …