What is Backflow? A Slide Presentation

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What is Backflow? What is a cross-connection? Considering that we are all connected by our community drinking water supply, the answers to these questions affect us all. This presentation describes cross-connections, what backflow is and why it must be prevented. We also discuss ways to prevent the possible backflow of contamination into the water in our own homes.

Understanding Backflow Prevention

Slide1 Backflow Presentation Understanding Backflow Prevention

Slide2 How to Get Water Modern Convenience - compare person carrying water buckets to flowing faucet

Slide3 Modern Water Delivery Diagram of Modern Water Delivery path

Slide4 Connected by Water Text Slide. We are all connected by the water distribution system

Slide5 One Way Flow Water should flow from the supplier to the consumer.

Slide6 Common Pipelines Picture of dirty factory connected to pleasant neighborhood

Slide7 Common Pipes Can Contaminate Illustration of the dirty factory contaminating the pleasant neighborhood

Slide8 Undesirable Reverse Flow Text slide. Backflow is water flowing backwards with hazards.

Slide9 How Can It Flow Back Text Slide. Cross Connections allow backflow to happen

Slide10 Common and Hidden Text Slide. Cross Connections are common & often hidden

Slide11 Actual or Potential Text Slide. Actual and potential connections are hazards

Slide12 Cross Connection Examples Image of hose end chemical sprayer

Slide13 Cross Connection Examples Images of hose in clogged sink and hose in dirty rain barrel

Slide14 Backflow is a Threat Text Slide. Threats include health hazards and pollution to users of water system

Slide15 Backflow Incident 2018 in Reading, PA Text. Bacteria in well contaminates city water system

Slide16 Backflow Incident 2016, Corpus Christi, TX Text. Acid in water lines asphalt factory did not have backflow preventer

Slide17 Backflow Incident 2012, Lubbock, TX Text. Power outage reduces supply pressure allowing backflow of user water

Slide18 Backflow Incident 2011, Somerset, MA Text. Fire hydrant connection of contractor pumps chemical poison into city water

Slide19 Backflow Incident 2010, Saratoga Springs, UT Text. Homeowner cross connections cause bacteria outbreak

Slide20 Back Pressure or Back Siphonage End user pressure higher than supply equals backflow. Image of town water system.

Slide21 Backflow Possibilities in the Distribution System Diagram of back pressure and back siphonage causes in various facilities

Slide22 The Threat of Reverse Pressure Gradients Text. Gravity, pumps, and high water flow can cause reverse flow.

Slide23 Mitigate the Threat Diagram of backflow protection located to prevent reverse flow from plumbing hazards

Slide24 Mitigate the Threat Text. Backflow protection works to mitigate the threat.

Illustration of backflow preventer protecting water main from chemicals and pollution

Slide25 Backflow Prevention Helps Clean Water Stay Safe Illustration of backflow preventer protecting water main from chemicals and pollution

Slide26 We Protect Each Other and Ourselves Text. Protect the community, protect our homes.

Slide27 Plan to Protect Text. Work with Water District, plan for expense, survey your home.

Slide28 Protect Before You Spray Image of hose end chemical sprayer recommending a hose bibb vacuum breaker

Slide29 Summary Text. Summary Points. Backflow is a threat that we all can work to overcome.

Slide30 Contact Information Text. Contact Pacific Backflow for excellent service!