Just tapped a Hefe. I tapped it the same way I've tapped all my other beers. Put to 30 psi for about 30 hours and it was ready. Depressurized and dropped to 5 psi for serving. The beer is perfectly carbonated, but the foam/head is huge and way too much. My other beer on the dual tap is still fine. Any ideas? Thanks!
Not the most scientific way, but turn off the gas to that keg and keep pouring until the foaming stops then turn the gas back on.
I've had this happen before. Try longer serving line (6 foot or so), other than that do what the others have said and give it time.
Also, cloudier beers like Hefe have a lot of suspended yeast and protein in it that acts as nucleation points for the carbonation, as the beer conditions and a bit of the gunk drops out, the beer will be better able to hold the carb
If the beer is perfectly carbed after that much foam/head dies down, I'm thinking it's actually overcarbed. Even if the carb level is right, if you're trying to serve at 5 psi, the pressure in the system will be driven by the carb level given enough time for the beer to off-gas. It will not matter what you've set on the regulator. Did you balance your system for a 5 psi serving pressure? Why did you drop the serving pressure so low?
Try 10psi with a 5ft beverage hose to the faucet. 5psi may be too little. I do 30psi for about 24 hours, burb the keg and then set to 10psi for a few days and it's good to go.
It's important to note that any changes to psi will require a few days, at least, to become effective. The beer has to absorb/release a sufficient quantity of CO2 before it has the desired effect.