Water Backflow Testing Prevents Contamination, Sickness & Even Death
PDM Plumbing, Heating, Cooling Since 1885
Rated 4.9 out of 1136 reviews
Water backflow problems can be disastrous for you and your neighbors, which is why testing water backflow preventers is required in commercial settings.
A knowledgeable, kind-of-a-neat-freak PDM plumber will clean, adjust, calibrate and reset the finer points of your water back flow valve to factory specs. We are certified to test, repair and install water backflow devices.
Call PDM to see if we are a good fit or not. Receive a free estimate, fast response, and high quality service.

A Certified Backflow Testing Expert Is Nearby.
For reduced pressure zone (RPZ), cross connection certified devices or water backflow preventer/valve testing call the area’s oldest certified plumber for trusted service.
We offer custom designed RPZ water backflow cross connection systems to protect your water and meet state codes. Hospitals, medical centers, laboratories, commercial and residential experience. Learn how we can prevent sewage from backing up in your building. Call for a free water backflow testing or repair estimate.
Send PDM Since 1885 a message online or call 815-726-6264 today!
What Is Water Backflow?
Think of water backflow as an unwanted flow in the opposite direction you need - so if you want dirty water to flow away from your restaurant, in a backflow situation the dirty water could flow back and contaminate your drinking water and cause you to have to shut down.
Essentially, any crossed connection in your water system could allow for backflow. A water cross connection is where a non-drinking water substance (sometimes deadly) has the ability to come in contact with drinking water. Water cross connections such as these can easily enable contaminants to enter the water lines through a process known as backflow.
When the pressure in a tank or trough dips below the water system’s pressure, this could pull contaminated water into your system. In some cases, your dirty water could contaminate the public drinking water, leading to potential liability.
Reduced Pressure Zone (RPZ) water backflow devices and valves are required in all commercial businesses. Individuals can purchase them as well to avoid potential liability (and a great mess!) for a backflow issue. These devices then need to be inspected every year to ensure they are in top working condition.
Why Joliet & SW Chicago Business Love PDM Backflow Testing Services
For over 138 years PDM has been a trusted neighbor you can count on. An experienced and state certified PDM backflow maintenance specialist is a top choice for water backflow device testing service. Once you realize PDM has your back you can totally rest easy - something we know business owners rarely get!
What PDM Will Do For Your Business
Our PDM Water Backflow Testing Team can maintain, repair and install, test and manage your water backflow RPZ controls while you focus on running a business. We provide comprehensive project management services so you don’t have to worry about a backflow testing project. Plus, we offer small to large RPZ cross connection service and savings.
We also provide:
Line Location Services Piping Identification Water Balancing Studies Water Analysis Services