Double trap at a sink drain: backyard testing and inconclusive results 

Thanks for questioning and testing! It’s crazy how many things are just repeated over the years and never verified

Awesome! Love the content!

I can post a picture of me and my structural engineer doing a facade inspection on a 15-story building and it will get a couple likes and comments...not much interest. If I post a picture of a sink trap and ask a simple question it will get 150 comments and start several arguments among home inspectors. Bizarre.