How often must a Reduced Pressure Zone (RPZ) device be tested?

A Reduced Pressure Zone (RPZ) device is an essential backflow prevention device used to protect potable water supplies from contamination. The requirement for testing RPZ devices is based on regulatory standards set forth by the Illinois Environmental Protection Agency as well as national guidelines.

These devices must be tested at least once a year to ensure they are functioning properly and effectively preventing backflow. This annual testing helps identify any malfunctions or wear that could potentially allow contaminated water to infiltrate the clean water supply.

Regular testing is crucial because if an RPZ fails, it might not only compromise public health by allowing pollutants into the drinking water, but also violate water safety regulations. By adhering to the annual inspection requirement, facility operators can ensure compliance while maintaining the integrity of the water system.