[FishStix]

I have 2 open channel drains 1" each going into sump, and have a waveline dc 12000 return pump, 3170GPH, it has control unit on it for flow. with that being said, what size do you guys think my return plumbing should be? Outlet on the pump is 1.25", so I am thinking after it out of the pump and sump, I would split the 2 returns with 1" PVC?

Thanks