The name of that clear sausage watering thing is called "rainbird". rainbird.com has tons of irrigation supplies from drip emitters for small gardens to parts and products for large scale applications.
The pdf is 3megs and may be slow, but it has a detailed description on how some of their products work and how to use them. 2 pages.
http://www.rainbird.com/pdf/turf/bro_IS.pdf