When installing or updating an irrigation system on your property, you may hear the term backflow being used. If you’re unfamiliar with the word, you may wonder what it is, why it needs to be prevented, and if you already have a prevention system in place. Use this guide to answer all your backflow questions and have an informed conversation with your irrigation installation specialist.

A Brief Guide to Backflow

What is backflow?

Backflow occurs when the direction of water flowing into and out of your home is reversed. Water flows to your home at a specific pressure from your municipal supply. However, that pressure can change due to outside factors like water main breaks or frozen pipes.

When this reduction in pressure occurs, the water is no longer being pushed at a steady pace and can end up reversing direction. As a result, dirty water that’s flowing in the wrong direction can enter and contaminate your water supply.

Why do you need a backflow preventer?

A backflow prevention system will help keep your home’s water supply fresh and clean. Without one, dirty water could contaminate the local clean water supply with harmful pollutants. If left unchecked, you could end up using water that has become susceptible to soap, chlorine, human waste, fertilizers, pesticides, and other harmful toxins found in your drain system.

How do they work?

A backflow prevention system creates an air gap between a home’s faucets and empty spaces in your pipes where water can collect. This gap will prevent any water from flowing the wrong way, keeping clean water flowing in while dirty water flows out.

You can also install preventer valves in vulnerable areas. This valve works like a gate guard and allows water to enter in one direction and seals shut to prevent backward flow.

Are preventers required with an irrigation installation?

To protect the safety of its citizens, the city of Columbia, MO, requires all homeowners to include backflow prevention devices when installing irrigation systems. Systems must be tested every year to ensure they’re working correctly since gradual wear and tear can cause damage.

The city also recommends checking your irrigation system throughout the year to be aware of any reduction in water pressure—the first sign of potential backflow trouble. A certified irrigation specialist will check your device, making sure it’s properly calibrated to prevent contamination.

If you’re unsure whether your property has a backflow prevention system in place, or if you would like to have it tested, contact Oasis Landscapes & Irrigation in Columbia, MO. For 31 years, this professional landscaping team has helped homeowners and property managers with sprinkler system design and installation, fertilization treatments, weed control, mowing and maintenance services, and landscape design. Learn more about their services on their website. To talk with a representative, call them at (573) 446-0858.