I was watching them pump sewage from a broken line yesterday and got thinking. Is there a maximum possible lift? Atmospheric pressure is around 15 psi(?), 30 inHg right? What happens when you try to pull 31 inches of mercury? Then taking it to a level only mindless commutes can create. If you took a perfect tube and dropped it from space (near perfect vacum) could you suck the oceans dry? Only went part way down, could you suck the pollution from the Los Angeles bowl?