No matter how you transition from 3/16 to 5/16 there will be an abrupt pressure drop. Since you'll have enough 3/16 before the change, foaming shouldn't be too big of a problem. You should be able to find brass tubing adapters in a hardware store.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
|