Is it an ICE-bank fridge with sparkling water?
If so, on the outgoing line on the back of the fridge, add a 1 meter, 4mm tube and connect this to the 6mm tube on the faucet. You can shorten the 6mm as much as you like, but leave the 4mm at 1 m length. (we do have a kit)
This slows down the pour speed, increases Co2 content.
Also, set the manometer at no more than 4 bar.