3 Types of Backflow Prevention Devices

When water leaves drains, toilets, and dishwashers, you never expect to see that water again, but backflow issues could cause the contaminated water to come back up through your clean drains. A typical plumbing system will have three different types of backflow prevention devices to keep your lines clean.

If one of these devices malfunctions, then you could run into backflow issues. If you do not have these devices installed, then you could risk your water quality on a regular basis. Learn about the three different devices and ways a plumber can help prevent backflow issues in your home for years to come.

1. Check Valves

Deep within your plumbing system are pipes known as check valves. These valves feature openings that can only open in a specific direction. If liquid tries to move in the opposite direction, then the valve will shut and no liquids will pass through. A check valve is typically installed on any of the direct drain pipes in your home.

For example, a plumber could install a check valve under a toilet drain, a kitchen sink drain, or a shower drain. If you have check valves installed and notice backflow issues, then the check valve could have malfunctioned. The valve door could get stuck open. In these cases, plumbers would replace the check valve with a newer part.

2. Vacuum Breakers

Backflow issues can also occur on any outdoor water sources you have. You do not want hose water or pressure washer water to go backward and back into the home. A plumber can prevent these backflow issues with the installation of a vacuum breaker.

A vacuum breaker is a small piece that will prevent a backflow issue known as back siphonage. The siphonage occurs when the pressure suddenly changes in the hose line and water gets sucked back into the source. The simple piece is easy to install, but a plumber must find the best location to ensure the part works properly.

If you have multiple hoses or spigots on your property, then you should have a vacuum breaker installed on each one. Due to outdoor weather elements, these parts may malfunction or go through wear over time. Annual inspections can determine if the vacuum breakers remain in good working order and will ensure you don't run into any backflow problems.

3. Air Gaps

If you have a dishwasher installed in your kitchen, then you will likely have an air gap device under the kitchen plumbing. The air gap piece will block any sink drain water from draining down into the dishwasher. The device creates a literal gap of air that prevent water from going into the dishwasher and moves the water down into the standard drain.

An air gap installation will ensure your dishes are as clean as possible and you don't have to worry about any dirty water issues when you empty your sink. In some cases, an air gap may crack or become clogged due to items that go down the sink drain. A plumber can replace the device and prevent any future backflow issues.

In some cases, it may be hard to tell if the air gap has failed or if backflow water is getting into the dishwater. In these cases, water testing and inspections will help ensure that air gaps do not occur. Plumbers will follow proper state codes to ensure you have installations that follow guidelines and keep your dishwasher water clean.

For any backflow issue needs, contact us at Power Plumbing Inc. We can perform a full inspection of your home and install all the backflow devices you need to ensure your plumbing operates smoothly.