On a new build, that likely is a Venturi line (yes a return, it creates more suction in the skimmer by using the output flow to make a Venturi), needed for the operation of that type of skimmer. It's part of the design of that type of skimmer.Lastly, I'm looking at the skimmer. Is that a return that is right below your skimmer? Are there concerns that it would push stuff away and make the skimmer less effective?
I work from home so I am able to get out a little bit and observe/question as best I can with the communication barrier. (These guys were too quick for me though.) It seems like to get a pool done right you have to be more involved than the PB, so I decided I might as well be "rewarded" for that.It seems like you have a substantially larger pool for about the same price as building mine was, so maybe the BYOP isn't a bad idea. I wish I would have had the time for it.