Need Help Recirculating Bio-Pellet Reactor

[brick-brothers]

I'm trying to build my recirculating reactor but i still need some parts. I have the reactor, the pump with 1/2 coming and going, and uni-seals. I know i need a true union 1/2 ball valve. I need the piece ( dont know the name of it) that will feed water to the reactor. Pix down below

 

[brick-brothers]

ok now looking at different videos on it, it looks a T- fitting with an adapter.