There are different devices and plumbing configurations that can be used to prevent backflow. A consultation with a certified plumber or the Cross Connection Office should help you decide which device is appropriate for your use.
| Device | Typical Applications |
| Air Gap | Swimming pools, sewage treatment plants, some industrial processes are not practical |
| Pressure Vacuum Breaker | Some utility sink applications |
| Double Check Assembly | Some fire sprinkler systems, some commercial properties |
| Reduced Pressure Principal Assembly | Irrigation systems, boilers, booster pumps, industrial plants, hospitals, morgues, chemical plants, some fire sprinkler systems |
Basic Installation Requirements:
Chapter 12.33 outlines some basic installation requirements for backflow prevention devices summarized here. For a complete understanding of the requirement, please consult the ordinance and/or a certified plumber.
-
Install the device immediately following the meter in horizontal plumbing for containment and on the water inlet pipe before it enters equipment for isolation.
-
Protect all backflow prevention devices from freezing.
-
If hot water is used, thermal expansion must be provided.
-
Do not install the backflow prevention device where it might create a safety hazard such as over an electrical panel or above the ceiling.
-
If you need to maintain continuous water service while testing or repairing a backflow prevention device, an additional backflow prevention device must be installed on the temporary line.
-
All backflow prevention devices must be accessible for testing.
-
All shut-off valves must conform to specified requirements in the current edition of the USC Manual of Cross-Connection Control
Additional Requirements for Reduced-Pressure Principle Backflow Devices
-
Protect the device from flooding
-
Do not install in underground vaults or pits
-
Must be able to drain the discharge of water from the device to a suitable drain
More Information about Backflow Prevention Devices
Cross Connection Control Office
Hours: 7:30-4:30 M-F
Phone: 319-286-5932
Fax: 319-286-5931
Email: backflow@cedar-rapids.org
Address:
1111 Shaver Rd. NE
Cedar Rapids, IA 52402
