RPZ Backflow Prevention & Annual Inspections
In order for the Village to comply with Environmental Protection Agency (EPA)
regulations, the Village of Willowbrook requires any structure, business, or residential with an RPZ device (backflow prevention) to have it inspected yearly by a licensed plumber.
All single-family residences with lawn irrigation sprinkler systems require the installation of an RPZ device and must have it inspected annually as well. After each annual RPZ inspection a certification form is required to be forwarded to:
Village of Willowbrook
Municipal Services Department
835 Midway Drive
Willowbrook, IL 60527
If you have any questions, please contact the Municipal Services Department at (630) 920-2238.