Ok, so in adding in the main drains I am considering adding the 3-way valve to balance the drains and the skimmer to the equipment pad, but the situation I have is if I do that I end up with the outlet sitting at the inlet of the pump.
When I say this, I mean there is a 2 to 1.5" reducer and a male adapter directly off the T portion of the valve into the pump inlet and the skimmer and main drain connections are connected to the run, so I would have the "dreaded" rams horn configuration where the flows collide at the inlet.
The way I have it configured right now, without the main drain, is the riser comes up through a ball valve, to a 90 degree elbow, through a union and into the pump. It has about 9 inches of straight flow into the pump.
I do have an option of plumbing the main drains out at the pool and putting the 3-way valve out there to control flow to the pump inlet. If I did that I would not have to mess with the plumbing at the pad and I would end up with an extra line for anything else in the future.
But, if it isn't such a crime to put the valve on the inlet of the pump, then that would be my "preferred" way of plumbing it for now. Everything is 2" PVC plumbing for reference.
Bookmarks