Sample interview questions: How do you handle situations where a backflow prevention device needs to be installed in an area with limited power supply or electrical access?
Sample answer:
Strategies for Installing Backflow Prevention Devices in Areas with Limited Power Supply or Electrical Access:
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Manual Air Gap Device: Utilize a mechanical air gap device that does not require electrical power. These devices create a vertical separation between the supply and receiving water to prevent backflow.
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Reduced Pressure Principle Device with Local Water Supply: Install a reduced pressure principle (RP) device with an internal pressure differential maintenance (PDM) that does not rely on external power. Connect the device to a local water supply with sufficient pressure.
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Gravity-Operated Backflow Preventer: Consider using a gravity-operated backflow preventer that utilizes the force of gravity to close the device in case of backflow. This option is suitable for areas with reliable flow and sufficient elevation.
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Portable Auxiliary Power Source: Bring a portable power source, such as a generator or battery pack, to provide temporary power for the installation and operation of an electrical backflow prevention devi… Read full answer
Source: https://hireabo.com/job/12_0_11/Backflow%20Prevention%20Technician