Expert village guy assembling water filter housing containers to be made into a hho generator.
They just screw together because the lid is threaded and has an o ring seal to keep it water tight.
Before he spools up the system he is going to fill up the bubbler.
A bubbler is a water barrier safety device that will prevent any backfire from reaching the hydrogen generators.
I dont really understand the concept of having a bubbler attached right next to the hydrogen generator because if it ignites, it is likely to ignite the hydrogen generator as well. But one thing the bubbler will accomplish is to ensure that no electrolyte solution gets sucked into your intake.
It probably wouldnt hurt anything much because it would be burned up so quickly but baking soda might not help the inside of your cars engine.
I am pretty sure GM does not test for that sort of thing.
In units that are built from pvc, a see thru bubbler would be very helpful to ensure that the generator was working properly. And for large hydrogen generators, it would be better for a bubbler to be located a few feet away from the generator in case it ignited.