No one wants to experience a backflow incident. Depending on what contaminant was involved and how much of the distribution system was affected, these incidents range from being a lot of work and expense to being a full-blown public health crisis. (See the bottom of this page to browse real backflow incidents that have occurred here in the U.S. as well as Australia and Canada.) Either way, a lot of people will have their water service disrupted and you'll have a lot of extra work on your hands until the situation is resolved. If you're hoping to prevent a backflow incident in your community, this week's videos, courtesy of AWWA, could help. The first video explains the basics of backflow and backsiphonage and provides a brief overview air gaps and backflow prevention assemblies. The second video covers similar topics but goes more in-depth on backflow prevention assemblies, discussing the most common models, how they work, and where and how they should be installed. The first video is about 5 minutes and the second is about 7-and-a-half. If you'd like more training on backflow and cross connection topics, visit our event calendar and select the Backflow category and your state. If you'd like to do more reading on your own, visit our document database and select the Backflow category and the Manuals/Handbooks document type.