Backflow and Your Business: What You Need to Know

Backflow and Your Business: What You Need to Know

Posted by on Mar 30, 2015 in Blog

466597239-BackflowBackflow occurs when the normal flow of water is reversed from its intended direction. There are two main types of backflow – backsiphonage and backpressure backflow. Here’s what you need to know about both of them.

Backpressure Backflow

This type of backflow happens when the pressure in a non-potable system exceeds the positive pressure contained within the water lines. For example, a potable connection system is connected to a building’s boiler system and is not protected by a backflow preventer. If the pressure within the boiler system exceeds the pressure within the distribution system at any point, water may flow from the boiler back into the public water system.


This type of backflow occurs when negative pressure, or a partial vacuum, exists within a water system. Due to this, water is drawn into a potable supply of water from a contaminated source. For instance, during a fire, a large pump is connected to a fire hydrant. At the point of distribution, the pressure becomes too great for the pump to handle, and it reverts to taking water from nearby locations, such as washing machines, water tanks, boilers, and air conditioning systems.

One of the best ways to prevent backflow and issues caused by it is to install a backflow preventer on your property. These devices create a physical barrier to backflow that keeps contaminated water from entering your building. If you are concerned about backflow issues or want to know more about a preventative device, get in touch with us at Cynergy Mechanical Ltd. for more information.

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