Lawn sprinkler, or irrigation systems connected to potable water are required to be protected by one of the following options:
- Atmospheric Vacuum Breaker (AVB)
- Pressure Vacuum Breaker (PVB)
- Reduced Pressure Backflow Preventor (RPB)
These devices are designed to be installed at the point of connection to the potable water system, to keep contanments from being pulled back into your drinking water through the sprinkler heads. Some possible sources of contamination would be lawn fertilizers and chemical pesticides that are found in the water that has a tendency to pool around low sprinkler heads on your system.