Backflow Testing Diagram. In accordance with oregon administrative rules chapter 33 public water systems section 42 230 cross connection. Only licensed plumbers with backflow prevention accreditation issued by a registered training organisation backflow plumbers can inspect commission and test medium and high hazard backflow devices.
When backflow preventer is filled slowly open the downstream shutoff and fill the water supply system. During backflow testing a number of issues can be brought to light and its incredibly important that this process is done thoroughly because it could be disastrous in the case of a future emergency. Attach an air compressor.
Valve and test cocks to facilitate testing of the assembly while it is in its functional in line position.
Valve and test cocks to facilitate testing of the assembly while it is in its functional in line position. The tester must have a solid understanding of how the assem blies work. Only licensed plumbers with backflow prevention accreditation issued by a registered training organisation backflow plumbers can inspect commission and test medium and high hazard backflow devices. If you are unsure of your backflow device test results please call the glide water association office at 541 496 3614.