If you’re planning to install a lawn irrigation system, backflow is a term you may keep hearing. It pertains to water moving in and out of your home, and it’s important to understand its effect. You’ll avoid a lot of problems by incorporating a preventer. Here are answers to common questions on the topic.

Understanding Backflow & Irrigation Systems

What is backflow?

Traditionally, water will flow from your home into your lawn irrigation system. Backflow occurs when the flow is accidentally reversed. It happens when water pressure in the pipes drops. This is common when blockages, like food debris, are restricting waterflow, or if a pipe is leaking. The pressure from municipal water is then too much and will flow back into your home.

What kind of damage can it cause?

Backflow pushes contaminated water back into your home, where it may spill from fixtures or broken piping. Contaminated water introduces several harmful bacteria when backflow occurs. Fertilizers, waste, chemicals, and soaps are just a few substances that can make you sick or damage your plumbing fixtures.

If the backflow pressure is too intense, it may also jostle pipes from their holds or loosen connections. Leaking water damages building materials, including flooring, drywall, and wood. Not only do they become a water-stained eyesore, but they also weaken and could collapse, creating further damage to your home.

How can a backflow preventer help?

A backflow preventer is a system of valves that only allows water to flow from your home to your lawn irrigation system. If backflow occurs, water cannot pass through the valve, and your clean water supply will remain protected. 

A sprinkler system installation professional will connect either end of this valve to the primary pipe leading from your home to the residential irrigation system. They’ll then seal the connections to ensure there are no leaks.

Does my municipality require a backflow preventer?

The Georgia Environmental Protection Division requires that all city service connections include a backflow preventer to prevent water contamination. Without one, you're in violation of building codes and subject to fines.

Interested in adding a lawn irrigation system or backflow preventer to your home? Allgreen Irrigation Systems provides comprehensive irrigation and installation services for Cumming, GA, residents. Since 1996, they’ve offered products from industry-leading manufacturers to both residential and commercial clients. Call (770) 888-9399 to discuss products and installation or visit their website to learn more about their services.