I purchased my current property before all of the buildings were completed. As such, I have a 60x80 outbuilding that has the plumbing roughed in for a bathroom, but the bathroom was not installed. I am currently planning on completing the bathroom, but have never completed a project like this.
I am trying to understand what all of the drains are intended to be used for. Specifically I do not understand which drain (Drain 1 or Drain 2 - both 2" pipes) is supposed to be for the sink.
In general, I am trying to understand what the layout for this bathroom was intended to be (i.e. where does sink, toilet, and walls go)
On the left side of the photo you can see the connections for a hydronic floor heating system. Is it possible one of the drains is to be used for this system?