- Quality & Environmental Reliability
- Backflow Prevention
Backflow prevention is the responsibility of the supplier of water (the BPU) and the water customer (you).
What Is Backflow and Why Is Backflow Prevention Important?
Please refer to the following video from the American Water Works Association (AWWA):
Backflow Prevention Program
The objective of the Board of Public Utilities (BPU) Backflow Prevention Program is to protect the public water system from potential contamination, as is required by New York State Sanitary Code (Section 5-1.31 of Part 5).
To help ensure that no water of questionable or unsuitable quality enters the public water system, the BPU works with water customers to have the appropriate backflow prevention devices installed, tested and maintained. Water customers are responsible for managing the installation, testing and maintenance of backflow prevention devices.
Please refer to the BPU's Backflow Prevention Policy for more information on the requirements for installation, maintenance and testing of backflow prevention devices. Failure to comply with this policy may result in charges to the water customer and/or discontinuation of his/her water service.
Backflow Prevention Devices
A backflow prevention device stops the backflow of possibly contaminated water into the public water supply during a back-siphonage or back-pressure event.
What Type of Backflow Device Should Be Installed at My Facility?
The type of backflow prevention device that is installed at a facility is dependent upon the degree of hazard of that facility. Please refer to the following AWWA video for more information:
Degree of Hazard Evaluation
The degree of hazard of a facility is determined through an evaluation by one of the following professionals:
- Professional Engineer
- Registered Architect
- Master Plumber licensed with the City of Jamestown *A Master Plumber can perform degree of hazard evaluations for existing buildings only
Once a facility's degree of hazard has been determined by the professional, the professional will choose the type of backflow prevention device that should be installed in order to adequately protect the public water system.
The type of backflow prevention device chosen to be installed must be on the approved list from the University of Southern California Foundation for Cross Connection Control and Hydraulic Research.
Please refer to the standards outlined in the following table:
|Degree of Hazard||Backflow Device Required||Device Standards|
|Non-hazardous||In-Line Dual Check Valve||Must be lead-free, meet ANSI/ASSE 1024 or greater, and meet all AWWA standards.|
|Aesthetically Objectionable||DCV1 or DCDA2||Must meet ASSE 1047 or greater and all AWWA standards.|
|Hazardous||RPZ3 or RPDA4||Must meet ASSE 1047 or greater and all AWWA standards.|
(1) Double Check Valve; (2) Double Check Detector Assembly; (3) Reduced Pressure Zone device; (4) Reduced Pressure Detector Assembly
DCDA and RPDA backflow prevention devices are installed on fire services. These devices should have a bypass line where the BPU can install a water meter; a testable backflow prevention device should also be located on the bypass line.
Backflow prevention devices need to be approved by the BPU before installation.
In order to obtain BPU approval, the professional (who completed the degree of hazard evaluation) must fill out the appropriate Backflow Device Application and send it in for review. The application may be sent to BPU Water Division Engineering by mail or by email.
Once the BPU has approved of the backflow prevention device to be installed, the contractor can proceed with the installation of the device.
Who May Install a Backflow Device?
Master Plumbers licensed with the City of Jamestown are needed to install backflow prevention devices on the following types of services:
- Domestic services
- Process lines
- Fire services
Exception: Pipefitters may also install backflow prevention devices on fire services.
Once a backflow prevention device has been installed, it must be initially tested to ensure it is functioning properly. From that point on, the device must be tested every year.
Backflow prevention devices are required to be tested by New York State Certified Backflow Prevention Device Testers.
The certified tester fills out a Report on Test and Maintenance of Backflow Prevention Device (sometimes shortened to 'test report'), each time a backflow device is tested. A copy of each test report must be sent in to BPU Water Division Engineering by mail or by email.
* Please note that this section only applies to testable backflow prevention devices. An in-line dual check valve, for instance, is a non-testable device.
If a backflow prevention device fails its annual test, the device must be repaired/replaced and then tested during the one-month period following the test.
If replacement is required, the device must be replaced with an equivalent type and model of backflow prevention device. If there is reason to replace the device with a different type and/or model of backflow prevention device, approval must be obtained from the BPU prior to replacement.