Sample interview questions: How do you handle the selection and specification of backflow prevention devices in plumbing designs?
Sample answer:
1. Code Compliance:
– Review local plumbing codes and regulations to ensure compliance with backflow prevention requirements.
2. Hazard Assessment:
– Conduct a comprehensive hazard assessment of the property to identify potential sources of contamination, such as cross-connections, plumbing fixtures, and irrigation systems.
3. Backflow Preventer Selection:
– Choose appropriate backflow prevention devices based on the hazard assessment and code requirements.
– Consider factors like the type of water supply, pressure, flow rate, and potential contaminants.
4. Device Performance and Approval:
– Select devices that are approved by recognized certification bodies, such as the American Society of Sanitary Engineering (ASSE), the Canadian Standards Association (CSA), or the National Sanitation Foundation (NSF).
– Ensure that the devices are capable of handling the expected flow rate and pressure conditions.
5. Installation Location:
– Determine the optimal installation location for the backflow prevention device.
– Consider accessibility for maintenance and testing, as well as protection from freezing or damage.
6. Installation Requirements:
– Provide clear installation instr… Read full answer
Source: https://hireabo.com/job/12_0_8/Plumbing%20Designer