DI Flow, which direction?

[Uncle99]

Does it matter which way the water travels through the resin?
I.e. Up through the resin, or down through the resin, or does it not matter?
I have seen systems with it both ways...

 

[Misled]

Up, keeps it from packing down and channeling.

 

[Uncle99]

Up, keeps it from packing down and channeling.

Interesting, big thanks, I appreciate!