diverter tees on direct return system?

[sgriffis]

Hello all!
I am putting together a simple 3 zone direct return system for my home.
I am running a Bosch greenstar boiler to restored cast iron radiators (some have TRVs).
For piping I plan on using 3/4" vega (barrier ) pex for supply/return with 1/2" branches to each radiator.

Do I need diverter tees for each branch? Or will regular tees be fine?

How far can I run a branch off from the supply/return loop?
In other words dose the supply/return loop need to run directly under each radiator?

 

[frodo]

 

[TomFOhio]

The only time you need divertor tees is on a monoflow system. Doesn't sound like you have that.