When you pour a glass of water, you probably trust that it’s safe to drink and free from contaminants. However, the certified technicians at GMW Fire Protection in Anchorage, AK, say that backflow, if not adequately prevented, may threaten the quality of your drinking water. Below, they explain the harmful effects of this mishap and how you can prevent it with a backflow prevention system.

A Guide to Backflow Prevention Systems

What Is Backflow?

As the name suggests, backflow occurs when dirty water flows backward through a plumbing system, contaminating the clean water supply. This event is caused by a sudden drop in water pressure. Since plumbing systems rely on constant pressure to maintain consistent water flow, a drop in that pressure triggers a reverse-siphon effect that causes the water to flow in the opposite direction. Pressure drops are generally caused by a plumbing failure, such as a frozen or burst pipe.

However, backflow will only occur if a cross connection exists in the plumbing system. A cross connection is a direct link between pipes carrying potable water and those carrying non-potable water.

Why Do I Need a Backflow Prevention System?

Both homeowners and businesses need backflow prevention systems to protect potable water from contamination. They are especially important for businesses with fire sprinkler systems, since these pipes often contain stagnant water. Backflow prevention systems prevent cross connections, protecting your drinking water should the plumbing system experience pressure loss.

There are a number of backflow prevention methods. The most common involve a device that creates an open vertical space—known as an air gap—between pipes carrying potable water and the pipes carrying dirty water. 

If you would like a technician to inspect your business for backflow prevention methods, contact the professionals at GMW Fire Protection. They have served Alaska for more than 15 years, and they are equipped to perform a wide range of residential and commercial fire protection services, including fire alarm installation and sprinkler system repair. Call (907) 336-5000 to speak to a company representative or visit their website to learn more about their services.