One of the most effective ways to protect our drinking water is to prevent contaminants on the outside of the distribution system from being pulled back into the public water supply. This can happen when pressure in the system changes and water flow is reversed.
A Cross connection is a physical connection between two otherwise separate piping systems; one contains drinking water and the other possible contaminants from an outside source. When there is a difference in pressure between two systems, the public water supply may become contaminated through a backflow event.
Backflow preventers are devices that stop water flowing through a pipe from changing direction. When backflow preventers are required, they are tested annually by Backflow Specialty. The customer is responsible for all costs associated with the installation and testing.
Water Hose Safety
You might be thinking of using your water hose to spray for bugs or fill your pool. Did you know that you may be doing something that could be hazardous?
By using your water hose to spray insecticide on the lawn, wash the car or spray flowers with bug spray, you may unintentionally create a hazardous situation. Any time your water hose is connected to a potentially harmful substance, that substance could end up in your drinking water. There are several things you can do to prevent this from happening:
- Purchase an inexpensive and easy to install backflow prevention device for all threaded faucets located outside your home. These devices are called “hose bib vacuum breakers” and are available for purchase at most hardware or plumbing supply stores.
- Make sure the end of your water hose is always kept clear and open. Do not leave the end of the water hose inside a pool, bucket or puddle.
- Do not leave a running water hose unattended.
Residential Cross-Connection Survey
TDEC (Tennessee Department of Environment & Conservation) requires that DWMF have an effective Cross-Connection Program. In addition to certified annual tests of backflow preventers, DWMF performs routine inspections for potential cross-connections and mails out questionaires to customers.