put a coffe cup of water in the microcwave , until the water boils, then dip the 3/16" line into the water for about 10-15 seconds. Then just push onto the barb. What's nice about the 3/16" on 1/4" barb is you could go without a worm clamp if you wanted, but I just play it safe and use one. On my party taps (which are temporary use at parties) I dont use a clamp.
Primaries: Mojave Red (AG)
Kegs: Hibiscus Saison (AG), Orange Kolsch (AG) , Cocunut Porter
Future Brew: Wee Heavy