Originally Posted by Peter_h
I have a stout tap and I have a beer gas setup.
It's a combination of the stout faucet and beer gas that makes it work. You can not have one without the other.
The restrictor plate is what gives it the creamy cascading pour but you need high pressure (25-35psi) to be able to force the beer through it or it just dribbles at the faucet and creates a glass of slow pouring foam.
You also can't just hook up the CO2 to the stout faucet and bump up the psi or you will overcarb the beer.
That's why you run beer gas. So you can run high pressure but the C02 is blended at a much lower percentage (10-25%) to keep the beer from over carbing. The nitrogen is not solubable in the beer, it is simply there to push the beer through.
It's a slightly older post, but it's pretty clear from his experiences. Don't think they've changed much.
My brainstorming for attaching the sparkler has me either using tubing over the perlick, or a fitting, like the growler filler, up into it. If I found an old swan neck, I'd salvage the threaded end and make that work too.