Reduced Pressure Zone

RPZ Certification Addison Illinois
  • Required reporting to municipalities and testing companies
  • Testing and certification of devices
  • Installation and repair of RPZ devices
  • Annual reminders of required PRZ testing
Since 1999

RPZ Certification, Installation & Maintenance Service Addison

Affordable & Prompt RPZ Certification.

RPZ devices, or Reduced Pressure Zone devices are vital in protecting the drinking water supply. They are used in fire sprinkler systems, lawn irrigation systems and other equipment. These devices are regulated by the law which requires annual certification for installation and maintenance of RPZ devices. MAS Plumbing is fully certified and our technicians are registered with Illinois EPA Division of Public Water.


Almost all villages and towns in the Chicago area, require you to have a backflow preventer test completed on an annual basis.

Backflow testing is essential annually even if you have a backflow prevention device. Let MAS plumbing certify your device to ensure that everything is running properly as it is required in Illinois. A suitable backflow prevention device will keep contaminated water from getting into your kitchen or bathroom.



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