Yup. Depending on your lines you may or may not need to bleed a little excess pressure after it's cold. I occasionally naturally carb kegs of all sizes. With cornies, make sure it's holding pressure. With some of mine I will have to blast it with 30psi to seal the lid real well, then bleed most of the pressure and let it carbonate. Otherwise, I would lose all the gas and 3 weeks of time.