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AL/MS AWWA Effective Backflow Prevention

AL/MS AWWA Effective Backflow Prevention. August 26, 2013. Sam McElroy, PE Civil Services, LLC sammc@knology.net (256) 755-0050. Introduction. Years ago, water systems did not include any form of backflow prevention in system designs.

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AL/MS AWWA Effective Backflow Prevention

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  1. AL/MS AWWA Effective Backflow Prevention August 26, 2013 Sam McElroy, PE Civil Services, LLC sammc@knology.net (256) 755-0050

  2. Introduction Years ago, water systems did not include any form of backflow prevention in system designs. Today, systems are required by law to develop and implement a backflow prevention program which meets state’s requirements. We will look at basic policies for residential, commercial, irrigation and fireline backflow prevention. To help establish if the program is effective, we will consider the functionality, cost, and convenience of the system. We will also consider the acceptance of the program by the customers, the public and regulatory officials.

  3. Cross Connection/Backflow Prevention - Definitions Cross Connection - Any physical connection or other arrangement through which unauthorized or potentially harmful materials can be introduced into drinking water. Backflow – a reversal of the normal direction of flow within a piping system. A backflow program should effectively protect a water system’s distribution lines from contamination or pollution from foreign substances which may compromise health. Check Valves -- typically do not have test ports. Are not considered true backflow preventers. Dual checks -- low hazard installations. Double Checks -- standard installations. Most common required. RPZ --- high hazard installations, chemicals, treatment plants, hospital.

  4. Backflow Prevention - What is it?

  5. Backflow Prevention - What is it?

  6. Backflow Prevention Codes • No single rule. • Different states, city, counties have different requirements. • Authority having jurisdictions may vary – water departments, fire departments, regulatory agencies, health department, inspection departments, etc.

  7. Backflow Prevention

  8. Alabama vs. Mississippi BFP Requirements • Alabama State Law • alabamaBFP.pdf • Every connection shall have a BFP installed.

  9. Alabama vs. Mississippi BFP Requirements • mscrossconnection.pdf • Mississippi State Law • No low hazard installation shall be required to have a BFP.

  10. Cost • Installation Cost • Maintenance Cost • Eye Soar - Above ground installations, loss of land use • Monitoring systems on some installations

  11. Communication • Does the public understand your BFP policy? • How do you communicate your departmental requirements. • How does the industry communicate BFP requirements? • Marble Mountain Sprinkler Burn.mpg

  12. Effective BFP Programs Many different programs and requirements exist for BFP requirements. Each system is required by law to develop and implement a backflow prevention program which meets minimum state’s requirements. Your program is most effective when you consider the functionality, cost, and convenience of the program. These aspects of the program should convey to customers the value of life safety though effective communications with customers and the public.

  13. Sam McElroy, PE Civil Services, LLC sammc@knology.net (256) 755-0050 • Questions ??? • Comments …

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