FAQ What is a Backflow Preventer? As the name suggests, a backflow preventer works to ensure that liquids do not flow back against the required direction of flow. When used in the context of a fire sprinkler system, a backflow preventer device is used to ensure that water does not flow from the sprinkler system back into the municipal water supply, or other source of drinking water. Unfortunately, water held in the sprinkler system can become contaminated. If allowed to re-enter the water supply, there is potential for the contaminated water to become a health hazard. The backflow preventer is intended to prevent water flowing back towards the main supply. Backflow preventers need to be checked regularly for effectiveness, as well as inspected annually by a fire inspection company in order to ensure they are working as they should. How Does a Backflow Prevention Device Work? A backflow prevention device responds to changes in pressure. When the water flows in the desired direction, the pressure of the flow pushes the backflow valve into the open direction, allowing the water to proceed as needed. When pressure builds up in the opposite direction (backflow), the pressure pushes the valve closed, meaning that water cannot flow back towards the mains. This simple procedure prevents contaminated water making its way back to the supply system. Backflow prevention devices normally require very little maintenance once in position, and do not need any external power supply in order to function correctly – their action is determined by the relative pressure on either side of the device. What is a Fire Pump? How Does a Fire Sprinkler System Work? How Often Should Fire Extinguishers Be Checked? Which fire extinguishers should be used for what kind of fire? How do you install a fire suppression system? What are fire alarm systems? How do you dispose of old/empty fire extinguishers? Getz Fire Equipment Headquarters 1615 S.W. Adams – Peoria IL 61602 Phone: 309-673-0761 Toll Free: 800-747-3473 Fax: 309-673-8067 Getz Fire PRODUCTS AND SERVICES HISTORY EQUIPMENT INNOVATORS CONTACT FAQ Copyright © 2017 Getz Fire. All Rights Reserved | Sitemap | Blog Getz Fire Branches 2810 Hundman Champaign, IL 61822 Phone 217-352-7911 339 Vermont St. Quincy, IL 62301 Phone 800-747-3473 2309 Grant St. Bettendorf, IA 52722 Phone 563-359-3333 2420 Harrison Ave. Rockford, IL 61108 Phone 815-394-0100