Backflow Preventer - What Is It And How Does It Work?

Not a lot of people realize that plumbing can get complicated. Nowadays, plenty of plumbing devices or technologies might be perplexing for most people. A backflow preventer is one example.

So what is a backflow preventer? How does it work?
And, do I really need it?

In this article, you will uncover the answers to these questions and more.

Backflow Preventer - What Is It?

The idea of a backflow preventer is easy to understand. It’s a device that needs to be installed into a pipe with the sole purpose of only allowing the flow of water in a single direction. The primary reason why you’d want the water to flow in a single direction is to prevent contamination because of backflow. When it comes to plumbing, backflow is something that is seriously considered. For example, water should only flow in one direction when it enters a property or home. The backflow of water from home to the mainline is potentially disastrous. However, mainly due to pressure changes and other possible reasons, the water can flow backward. Imagine there’s a break in the main water pipeline or a fire hydrant that expels water. When such events happen, there is a pressure loss in the main water supply. If there’s not enough pressure in the mainline to push water to your home, it’s now possible for the water to flow back. When backflow happens, a potential of disastrous events may happen. For example, fertilizers, pesticides, human waste, chlorine, soaps, or detergents may flow back to the main water supply. From then on, the city or community could end up with a health disaster in its hands. Thankfully, you can prevent such a major potential problem using a backflow preventer. Until now, this article is centering around preventing the backflow of water from a hose to the main water supply. However, a backflow preventer can also help prevent the backflow of sewage water into the home.

How Does It Work?

There are different types of backflow preventers, and each will have its own mechanism of only allowing water to flow in one direction. Below are some of the most commonly used backflow preventers.

Atmospheric Vacuum Breaker (AVB) – this kind of device doesn’t use any valves. Instead, it uses natural air and water pressure. Typically, it looks like an elbow-shaved device, and it’s commonly placed on a flush, toilet or faucet valve.
Double Check Valves (DCV) – this type of device makes use of a gate valve or ball on each end. The design also allows for isolation and testing.
Double Check Detector Assembly – this one works very similar to the DCV but with an added detector. The detector is for notifying if the water is being used.
Reduced Pressure Zone Device (RPZ) – this design incorporates two independent check valves. Also, it allows for the drainage of excess pressure. Typically, this device is only installed if there’s a potential that the backflow could seriously injure someone.

Do You Need A Water Backflow Preventer?

Typically, minor backflow preventers are part of modern plumbing, so it’s likely that it’s already installed. However, for major backflow preventers, things can get tricky. In most places, you are required by law to install a backflow preventer if it’s water coming from the main water supply line into your home. It’s usually installed next to the water meter. However, not all places are required by law to install a backflow preventer, so you might want to check your local plumbing regulations. If you reside in a place where a backflow preventer is not required by law, it’s still highly recommended that you install at least two. You need one to prevent water from flowing back from your home to the main public water supply. Even if it’s not required by law in your area, installing one is what a good citizen will do. You might also want to install a backflow preventer to stop sewage water from going back to your home. The main sewage line is likely a lot filthier than your home’s sewage. Hence, you don’t want that flowing back into your house.

Wrapping It All Up

A backflow preventer is a device that is typically installed into a pipe. Its main purpose is to allow water to flow in one direction and prevent it from going back to the opposite direction. Most counties will require you by law to install a backflow preventer to prevent the backflow of water to the main water supply line. Check your local plumbing regulations if you want to be sure.

Why Choose Us for Backflow Preventer Testing in Burlington County, New Jersey?

We are a top-rated company that offers backflow preventer testing services in Burlington County, New Jersey. All of our employees are certified and insured, and we pride ourselves on providing quality customer service.

We offer various services, including backflow preventer testing, repairs, and installations. We also provide 24/7 emergency services, so you can count on us to help you in a time of need. Contact us today to learn more about our services or schedule an appointment!