A backflow tester’s skill and knowledge is both checked before the commission gives any kind of accreditation, certificate or licence. Before even they start a test, they are asked about their plan of action and the safety conditions or precautions they will consider to avoid any high, medium or low hazards.
Device handling is checked
The plumbers are checked for their expertise in installation of the device according to the requirements, the way they operate the device and also if they recheck the previously installed device to make appropriate fittings and replacement. Once the device is installed and the backflow testing is completed, the commission observes the way in which the field is cleared or cleaned and the all the findings are documented in an organized manner.
Finally for backflow testing the preventers should know to check the water flow and pressure rates, mechanics and hydraulics involved in prevention of backflow, equipment safety measures, coordinating with other devices or services, procedures of isolation and testing techniques, calculation of materials required, methods of application or implementation of the backflow device, controlling backflow hazards during low, medium and high stages.
Also working with a team and communicating effectively, numerical skills to solve the measurement related calculations, interpreting the data and value specifications, bringing out faults in the reports and correcting the same, following the guidelines and instructions necessary and knowing ways of accessing the required information at the right time are certain essential qualifications that backflow preventers should possess to be experts in their profession.