If you have a house that is an onseptic tank and for those that denote septic tank is basically your closed loop system Right and you got to take care of yourself. Well, can so if I'm in a neighborhood like a collection of houses and everyone has their plumbing and it goes down? You sort of see that same sort of pattern of houses and these giant sprawling suburbs or cities whatever it all All of the plumbing is underground and it's going many many miles It could be yeah, and how big are these central tubes? The pipes the pipes they're like 36 inches or so. Yeah oil inches 36 36 36 42, you know, it all depends So human be could fit