Skip the hassle of making your own shopping list of fittings and valves, then cutting and gluing, and go with Adaptive Reef’s Dual 1/2 inch Manifold. This premade manifold accommodates diverting flow to 2 different outlets, and can be used for a variety of applications, from closed loop flow diversion, to running equipment like a skimmer or reactor. Each outlet includes its own ball valve for basic on/off and larger general flow adjustments. 
 
Features
Individual flow control
Clean, professional look
Unions at all connection points