When i bought keg kit it came with a party tap, the beer line is i think 3/16th from the disconnect to a connecter with about 4'' of 3/8th to the tap, i have played around with it and made 3/16th bit shorter down to 2 meters and it poured fine for 3 glasses at 2 to 3 psi then flat as a pancake i turned it up to 10 psi no joy, my question is is the 3/8th making it lose all the pressure to get a head on the beer, all help appreciated