I probably would have for a more complicated system, but ours is super simple, nothing fancy. One line for water in, one line for water out! And the T for the two deck jets.Have a Sharpie Marker in hand to label pipes during Pool School. You can go back later and make fancy labels. I found it useful to mark with arrows the direction the water is going to understand everything.
Plus, having done my own pvc plumbing for many aquariums, i'm pretty familiar with the general idea of it.
