****Do Catholics immerse or sprinkle?
****What is the Biblical model?****
Neither sprinkling nor immersing: Catholics pour water over the head of the person being baptized. Usually the person is positioned in a way that the water is poured from the forehead to the back of the head.
What is the Biblical model? We know that St John the Baptist baptized “in the Jordan,” which made sense in a time without plumbing, but it seems unlikely that St Paul baptized with a full immersion when he baptized a household after his release from prison by an earthquake (Acts 16:33).
“it seems unlikely” is hardly Scriptural support.