The air is supplied by an LA80 Medo linear piston pump. Distributed by 1 inch to 1/2 inch rigid pvc.
The drip kit, with all the parts, a 5/32 drill is used to make the valve holes in the 1/2 poly line.
A typical assembly with short airline for this example. Valve can be inserted directly to 1/2 poly line.
I installed two per tub, here a tub of eggs is incubating.