Tips And TricksUpdated July 7, 2026
Backflow is a risk for any business that connects to the municipal water supply. Every year, commercial properties in Lake In The Hills are required to test their backflow prevention assemblies to avoid water contamination. This is not just a box to check for compliance. Backflow can let everything from lawn chemicals to bacteria flow into the main water line, affecting your building's water and your neighbors' too. A proper test keeps your business safe and the whole village's water supply clean.
Why Backflow Testing Is Critical for Local Businesses
Our region's water comes from Lake Michigan and feeds municipal supply lines at moderate hardness. Local codes require businesses, especially those with irrigation systems, fire sprinkler lines, or commercial kitchens, to have backflow prevention devices tested yearly by a licensed plumber. Without a working backflow preventer, cross-connections could allow contaminants to enter the water system during a drop in water pressure. This can happen if there is a water main break near Algonquin Road or a sudden high demand in summer when irrigation kicks on throughout the northwest suburbs.
What Happens During a Backflow Test
When our team tests a backflow preventer, we follow a specific sequence. We shut off the water at the proper isolation valves and use test ports on the device. Our gauges measure the pressure differential to make sure check valves and relief valves hold the right closing pressure. We also inspect for leaks or debris that could block proper operation. The entire process usually wraps up in under an hour for a typical assembly, unless we find a failed part or need to clear debris. Afterwards, we complete the required compliance paperwork for reporting to the village or township as needed.
Types of Backflow Devices in Commercial Properties
Businesses in Lake In The Hills most often use reduced pressure zone (RPZ) assemblies or double check valve assemblies. RPZs are common for irrigation, fire sprinklers, and high-risk applications due to their fail-safe design and relief valve. Double check valve assemblies are installed for lower-risk situations, such as commercial soda fountains or some restroom fixtures. Our commercial crew also sees atmospheric vacuum breakers and pressure vacuum breakers in certain outdoor set-ups. Each device type needs specific testing procedures and service tools.
Common Backflow Issues and Warning Signs
Failing annual testing or skipping needed repairs puts your water supply at risk. Here are issues we see with business backflow preventers:
- Leaking test ports or shutoff valves
- Corroded device housing leading to poor valve operation
- Debris or mineral buildup, especially with the moderately hard water in the area
- Improper installation that causes the assembly to fail tests
- Freezing damage after a hard Lake In The Hills winter if devices are left exposed or uninsulated
If your device leaks, emits a strange noise, or you notice pressure changes in interior fixtures, have a professional check the system. Routine leak detection and repair is smart for backflow devices and the supply lines around them.
How to Prepare Your Business for Annual Backflow Testing
Keeping your backflow system accessible and in good shape helps testing go smoothly. Here are practical steps for business owners and managers:
- Locate all backflow prevention assemblies and keep the areas clear for inspection
- Check for visible leaks, rust, or any sign of tampering before the appointment
- If your system has shutoff valves, make sure they're functional and marked
- Winterize exterior assemblies before the first freeze each fall to prevent ice damage
- Keep compliance records from previous years handy for reporting
If you find corroded pipes or evidence of previous leaks, it may be time for a more in-depth assessment. Our team can provide pipe repair and repiping if needed for assemblies that have seen years of harsh Lake In The Hills winters. Don't forget about the rest of your plumbing systems either. Testing often uncovers other issues, clogged lines or aging shutoffs, that we can address through commercial plumbing services.
The Link Between Backflow Devices and Other Building Systems
A lot of business owners are surprised to learn how much a faulty backflow device can affect other parts of their plumbing. For example, if you experience persistent slow drains, it may not be a direct backflow device issue, but improper pressure can worsen problems throughout your supply and drainage system. We handle drain cleaning and sewer line services for businesses, which often ties in with backflow compliance projects. Keeping everything running efficiently means safer water for everyone in the Chicago suburbs.
If your Lake In The Hills business is due for backflow prevention testing, our licensed commercial plumbers are ready to help. Call us at 224-524-1522 to schedule your annual test or get advice on keeping your building up to code.