Eli5 when it’s windy outside why does the water in toilets swish a little bit?

Question

Eli5 when it’s windy outside why does the water in toilets swish a little bit?

In: 1241

Answer 1

ITT OP has a weird vent pipe or sewer grate and thinks other people do too. Breh we’ve never seen what you’re talking about in our lives. But obviously you know whats going on since you connected the two things in your headline.