WB
On a normal toilet most folks don’t know
Thursday, August 01, 2019, 06:05

That there is only about a hat full of water blocking an open hole to not only the sewer but the venting pipe too. Water is blocking gasses in that S-bend. Ditto on your other house plumbing drains. It stops mainly the stinky sewer gasses. Blocking snakes, rats,chipmunks,birds, whatever is purely an afterthought in design.

Homes vacant for a time the water block can evaporate and cause problems.