[header] How to baptize someone [title] Fill the baptistry with warm water ahead of time. [step] You'll need to fill the baptistry early enough that it has time to fill, which could take 20-30 minutes. At the same time, don't fill it so early that the water gets cold, unless the baptistry is equipped with a heater.
Ignore this part if you are not using a baptistry. [substeps] Baptisms can be performed in any standing body of water such as the ocean, a pool, or a river.