Sample interview questions: Are you familiar with backflow prevention systems and their installation requirements?
Sample answer:
Yes, I am familiar with backflow prevention systems and their installation requirements.
Backflow prevention systems are designed to prevent the backflow of water from a non-potable source into a potable water system. This can occur when there is a sudden drop in water pressure, such as when a fire hydrant is opened or a water main breaks.
There are several different types of backflow prevention systems, each with its own specific installation requirements. The most common type of backflow prevention system is the reduced pressure zone (RPZ) valve. RPZ valves are installed in the water supply line, just downstream of the point where the non-potable water source is connected.
Other types of backflow prevention systems include:
- Air gap separators
- Atmospheric vacuum breakers
- Double check valves
- Pressure vacuum breakers
The specific type of backflow prevention system that is required for a particular installation will depend on the following factors:
- The potential for backflow
- The height of the non-potable water source
- The flow rate of the non-potable water source
- The temperature of the non-potable water source
I am also familiar with the following codes and standards related to bac… Read full answer
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