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Who requires RPZ or Backflow Preventer testing?
The Illinois Plumbing Code requires that a backflow prevention device be installed on all (Commercial and Residential) irrigation systems to protect the potable water supply.

The law not only requires the use of backflow prevention devices, but also that the devices be tested once per year.

Contact Information:
Illinois Dept. of Public Health, (217) 524-0791
Illinois EPA Division of Public Water Supply Field Operations, (217) 782-1020

State law also requires that the local municipality provide oversight that all requirements are being met.

Village of Orland Park, Public Works Department, (708) 403-6350
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Public Works

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1. What is back flow and why is a Back Flow Preventer required?
2. Who needs to have their backflow prevention device tested?
3. Who requires RPZ or Backflow Preventer testing?
4. Why does the water have chlorine taste and smell? What can I do to remove it?
5. What causes the tiny air bubbles or cloudiness in my water?
6. How do I report a possible water main break?
7. How do I apply for a temporary watering exemption?
8. When does my garbage or recycling bin get picked up?
9. Does the Village trim the parkway trees?
10. How do I report a pothole?
11. Does the Village fix sidewalks that are cracked, sunken or are tripping hazards?