Backflow, cross-connection, and back-siphonage all mean the same thing - used water that has already left your water pipes and is reintroduced into your home's water system. Backflow is caused by a drop in water pressure (i.e, when firefighters pull water from a hydrant or while crews are repairing a water main). A Backflow Preventer is a mechanical device that acts as a check valve to prevent used water from re-entering and potentially contaminating your drinking water.
Resources
For more information about backflow prevention email Brian Breault, Cross-Connection Control Coordinator, or call at 970-256-4101.