What Exactly is Backflow?

 

Backflow is defined as the unwanted reversal of flow in a water distribution system.  Due to changes in the hydraulic pressure in a water distribution system or a piping system inside a customer's premises, backflow occurs on a regular basis.

 

The polluting substance, usually a liquid, tends to enter the potable water supply if the net force acting upon the liquid acts in the direction of the water supply.  Therefore, two factors are essential for backflow to occur.  First the normal direction of flow in the distribution system must be interrupted.  Second, there must be a link or connection, between the potable system and the source of contamination.

 

Backflow only becomes a serious problem when there are cross connections within the water distribution system.

 

The City of Grain Valley Public Works Department strives to:

• Protect the potable water supply from contamination or pollution by containing within the consumer’s internal distribution system(s) or private water system(s) such contaminants or pollutants which could backflow through the service connection into the public potable water supply?

• Promote the elimination, containment, isolation or control of existing cross-connections, actual or potential, between the public or consumer’s potable water systems and non-potable water systems, plumbing fixtures and industrial-process systems.

• Provide for maintenance of a continuing program of cross-connection control which will systematically and effectively prevent the contamination or pollution of all potable water systems.

Grain Valley Backflow Coordinator - Stephanie Brawley - 816/847-0091

 

For further concerning backflow contact the Missouri Department of Natural Resources

website or call 816/622-7000