Kasco has recently come out with a new "CertiSafe" Mixer. These mixers are certified to strict NSF/ANSI 61 & 372 standards and are created to be used in municipal tanks and reservoirs 10,000 gallons or larger. These are designed and certified to be used for safe, efficient mixing of potable water. Here's a quick video from Kasco showing you what it can do. For more information visit their website here.