> The P trap under your sink isn’t to catch valuables that go down the drain. It’s there to hold water so that gasses and critters can’t come through Yeah, I h

> The P trap under your sink isn’t to catch valuables that go down the drain. It’s there to hold water so that gasses and critters can’t come through Yeah, I have a P-trap in the kitchen space of my single-room flat, in theory for the dishwater; but since I don't have a dishwasher, there's no water and I got sewer smells until it was plugged by rags.