You are buying on a 2" Slip X 2" Slip X 2" Slip 3 Ports Wye Style Manifold open style. You use this Wye in place of Tees for smoother water transition as well as more pump power. The list on this manifold is $23.92.  This part used in tubs where 2" softpipe glues inside the ports and splits to two outputs and goes to the back of each jet in the tub and is plumb into 2" Pipe that runs from the pump pressure side.

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