A backflow prevention device is required when injecting fertilizers, chemicals, or any additives into an irrigation system. The backflow prevention device prevents water contaminated with additives from flowing back into your drinking/potable water supply. Many areas require a backflow device to be installed on every system regardless of the use of fertilizers or chemicals.
For built-in backflow prevention, see our Rainbird Anti-Siphon AC Valves.
Important Note: Check locally for building codes and backflow prevention requirements in your area for specific recommendations.