Could you imagine how much cum you could move in a pipeline? Let's say it was 36 inch pipe over 50 miles. Assuming the ejaculate has the density of 1 ounce per cubic inch, that makes 1,400,000 gallons of semen in the pipeline alone! If the velocity of the cum in the pipe is, it would take only about 14 hours and 40 minutes to move all of that semen. In a day that's 2,291,000 gallons of semen!
It really makes you appreciate the marvels of modern technology.