For years, The City of Williamston has complied with an important Regulatory Water Safety Compliance Program known as Cross-Connection Control.
This State Mandated Program focuses on both residential and non-residential (commercial) water service connections and onsite visual inspections to identify potentially harmful interconnections to the Williamston Public Water Supply. Cross-Connection inspections for single family residential customers are typically handled during scheduled water meter replacement or repair appointments by Department of Public Works staff since they will already be on the premises. The inspection of commercial buildings will be coordinated and performed by HydroCorp of Troy, MI.
For questions regarding commercial inspections, call HydroCorp at (844) 493-7646. For questions regarding residential inspections and appointments, call the Williamston Department of Public Works at (517) 655- 2221.
Michigan Department of Environment, Great Lakes and Energy (EGLE) requires Public Water Systems to implement a Cross-Connection Control Program to protect all Water Service Connections.
This web page serves to assist Williamston Water Customers with their participation in this important safety program. The city has selected HydroCorp to assist with Coordination, Site Visits, and Data/Compliance Management.
HydroCorp sends postal notice of upcoming Cross-Connection Inspection. Toll-Free hotline number provided for FAQ.
HydroCorp hired by local water purveyor to assist with CCC Program.
Facility owners have the option to coordinate the date of onsite inspection by HydroCorp.
Cross-Connection Surveyor arrives with I.D. and conducts survey/inspection with permission by owner/occupant.
Surveyor documents existing and any potential corrective actions, explains next step responsibilities to owner. Corrective actions instructions are also mailed via postal to building owner with compliance due date.
Water Customer/Owner contacts HydroCorp when corrections are made and onsite compliance inspection is scheduled.
HydroCorp hired by local water purveyor to assist with CCC Program.
HydroCorp sends postal notice of upcoming Cross-Connection Inspection. Toll-Free hotline number provided for FAQ.
Facility owners have the option to coordinate the date of onsite inspection by HydroCorp.
Cross-Connection Surveyor arrives with I.D. and conducts survey/inspection with permission by owner/occupant.
Surveyor documents existing and any potential corrective actions, explains next step responsibilities to owner. Corrective actions instructions are also mailed via postal to building owner with compliance due date.
Water Customer/Owner contacts HydroCorp when corrections are made and onsite compliance inspection is scheduled.
The anti-siphon fill valve device is located in the tank of your toilet. This device has a dual purpose: To fill the toilet and prevent backflow. This device must be placed at the proper height in order to insure that water from your toilet does not backflow into your drinking water. Proper placement is typically done during the installation process but can be easily overlooked. This device must be raised or the overflow pipe must be cut down in order to achieve a 1” air gap separation between the “critical level” of the assembly.
Click here to see an installation diagram.
Click here for 3 minute video overview.
 Example: Hose connection vacuum breakers |  Example: Integrated vacuum breaker on outside hose spigot. |
 Example: Hose end in bucket |  Example: Hose end in pool |
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Vacuum breaker should not be subject to continuous pressure like the example here illustrates. (This type of irrigation set up/system would need to be corrected.) |
These require periodic performance testing by a Certified Tester.
Pressure Vacuum Breaker Assembly |
Reduced Pressure Principle Backflow Prevention Assembly |
