Use these helpful videos to understand backflow prevention.
Videos: Backflow Prevention Program for ICI and multi-residential properties
1. Markham's Distribution System
2. Cross Connection and Backflow
3. Historic Backflow Incidents from ICI Properties
4. Backflow Preventer
5. Backflow Prevention Program for ICI and Multi-residential Properties
6. Typical Cross Connections at ICI Properties
7. Closing Words
Videos:Backflow Prevention Program for Single Residential Properties
1. Historic Backflow from Residential Properties
2. Markham's Backflow Prevention Program for Residential Properties
3. What Can I do to Prevent Backflow Inside My House