I would not use a watering system.
Well I probably will because the rack will be a 12 tubs rack (2 across and 6 down) top 3 to 4 levels will they regular rats to 2 to 3 levels will be for ASF (not sure yet are many tubs will be dedicated to ASF
HOWEVER! I would caution you big time when it comes to putting these things in racks. They have the most nipples in the rodent family. They are also one of the BEST CHEWERS!
I am aware of that fact which is why they are provided with a piece of wood and a wheel in their temporary tub (So far no chewing they've been TOO busy).

I just cannot afford having glass tank everywhere if I want to save space and be efficient on cleaning day.

Thanks for the feedback.