What We Do Best 

Backflow Testing, RP Testing, Inspections, and Prevention Services in Naperville, IL


Backflow Testing, RPZ Testing, Inspections, & Prevention

For over 50 years, Phil Walz Plumbing has offered affordable, specialized, and dependable backflow testing services throughout Naperville, Illinois. Our plumbing specialists offer an expansive selection of repair, installation, and replacement services and skills for backflow prevention devices. Phil Walz Plumbing is a certified Illinois licensed (#058-115130), bonded, and insured Naperville plumbing company that has five decades of experience in the industry.

Commercial spaces and various residential areas are required to install backflow devices to prevent dangerous backflows of water throughout the commercial or residential plumbing system. A water backflow in your plumbing system is possible in areas there is a cross-connection of clean and contaminated water. To ensure your clean water supply is not mixed with harmful bacteria, it is important to receive a formal annual backflow test. Conducting backflow tests in your commercial facility or residential space will help keep visitors safe that utilize the water system. Facilities that do not follow backflow testing guidelines are subject to disciplinary actions. Call us today at (630) 355-0080 for more information. You can also fill out the form located on this page and we will get back to you as soon as possible

RPZ Backflow Testing

Water utilities require annual testing to ensure your cross-connection protection devices are working properly and are up to code. Our team at Phil Walz Plumbing can perform RPZ Testing on your plumbing to ensure your water is clean and free of contaminants.

RPZ Backflow Valve Installation

Fixing and replacing a RPZ Backflow valve can be a lengthy process that requires a variety of devices to properly do the job. Phil Walz Plumbing, Inc. employs highly trained plumbers who are able to install the right devices needed to fulfill the installation process. With our backflow testing services or valve replacements, we'll ensure your system is working properly and efficiently for you with clean, clear water flowing.

Our plumbing specialists are qualified to test, repair, and install backflow prevention devices. Phil Walz Plumbing will collaborate with you to diagnose plumbing repair and installation issues throughout your building and will select a backflow preventer for your system. Prior to choosing a backflow prevention device, we conduct an audit of your plumbing system and potential risks to ensure an optimal solution.

Contact a plumbing specialist at Phil Walz Plumbing by calling (630) 355-0080 to learn more about our reliable and safe backflow testing services & backflow inspection services.


  • RPZ Backflow Testing

  • RPZ Backflow Valve Installation

  • Drain Inspections

  • Drain Protection

Having drain issue? Phil Walz Plumbing also offers affordable drain rodding services!