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Backflow Valves: Do You Need One?

June 22, 2023

Homeowners in the Greater Boston area may not be aware of the potential dangers posed by backflow sewage in their plumbing systems. A backflow sewage valve is an important part of your home’s plumbing system and should be installed as soon as possible to protect you, your family, and your property from costly damage or even health risks. In this blog post, we'll explain what a backflow sewage valve is and why it's so important for home maintenance. 


In This Article:

1. What is a backflow sewage valve and why do I need one in my home plumbing system

2. Types of backflow valves

3. Benefits of having a backflow valve installed in your home

4. Potential risks without a backflow valve

5. How to know if you need to install or replace a backflow valve

6. The importance of regular maintenance on your backflow valve


What is a Backflow Sewage Valve?


A backflow sewage valve, also known as a backwater valve or sewer backup valve, is a plumbing device installed in a home's sewer line to prevent wastewater and sewage from flowing back into the property. This valve allows sewage to flow in one direction only – away from the house – and automatically closes if water tries to flow back towards the home. 


Types of Backflow Sewage Valves


There are several types of backflow sewage valves available, each with its own design and mechanism to prevent wastewater from flowing back into your home. The most common types include:


Flap or gate valve 

Also known as a swing check valve, this type of valve features a hinged flap or gate that allows wastewater to flow away from the house. When backflow pressure occurs, the flap closes against the seal, preventing wastewater from entering your property. Flap valves require regular maintenance to ensure proper functioning.


Ball or float valve 

This type of valve uses a ball or float mechanism to block the sewer line when backflow occurs. As the water flows away from the house, the ball remains at the bottom of the valve. However, when the water starts to flow back, the ball floats up and seals the pipe, stopping the backflow. Ball valves also need periodic maintenance to ensure effective operation.


Dual flap or double gate valve 

This valve design features two flaps or gates that work independently, providing an extra layer of protection against backflow. If one flap fails, the other can still prevent sewage from entering your home. Dual flap valves are more reliable but may be more expensive than single flap options.


Combination valve 

A combination valve incorporates both a flap and a ball mechanism, offering enhanced protection against backflow. The flap provides initial resistance, while the ball offers additional sealing if the flap fails to close completely. This design is considered highly reliable but may be more complex and costly than other options.


Benefits of Having a Backflow Valve Installed in Your Home


Having a backflow valve installed in your home provides numerous benefits, including: 


Protection from sewage backups 

Prevents wastewater and sewage from flowing back into your home during heavy rain, flooding, or blockages in the municipal sewer system.


Health and safety 

Reduces the risk of harmful bacteria, viruses, and contaminants entering your living spaces, maintaining a sanitary and safe environment for you and your family.


Compliance with local regulations 

Ensures adherence to local building codes and municipal regulations that may require the installation of a backflow sewage valve.


Lower insurance premiums

May qualify homeowners for lower insurance premiums by reducing the risk of property damage caused by sewage backups.


Increased property value 

Enhances the overall appeal of your home to potential buyers by demonstrating proper maintenance and protection against potential hazards.


Peace of mind 

Provides a sense of security, especially during periods of heavy rainfall or flooding when the risk of sewage backup is higher.


Environmental protection 

Contributes to a cleaner and healthier environment by preventing sewage from entering your home and the local water supply.


Potential Risks Without a Backflow Valve


A backflow sewage valve is to protect your home from flooding and contamination caused by sewage backups during heavy rain, flooding, or blockages in the municipal sewer system. By installing a backflow sewage valve, you can reduce the risk of property damage, health hazards, and unpleasant odors associated with sewage backups.


How to Know If You Need to Install or Replace a Backflow Valve


If you are unsure about whether or not your home plumbing system needs a backflow sewage valve, it is best to call in an experienced plumber for help. A qualified professional can inspect your plumbing system and assess whether or not you need to install a backflow in order to protect your property.


The Importance of Regular Maintenance on Your Backflow Sewage Valve


Once you have installed a backflow valve, it is important to perform regular maintenance in order to ensure that it is in proper working order. Over time, the parts of a backflow sewage valve can become compromised and may need to be replaced in order to ensure that it is still functioning properly. It is advised that a visual inspection and cleaning is completed once a year on your backflow valve. Regular maintenance also helps prevent flooding or other damages due to backed-up water pressure.


Call On Professionals You Can Trust


At Home Mechanics, we offer a variety of services to help homeowners ensure that their homes are equipped with the right type of backflow sewage valves. Our experienced technicians can complete your backflow sewage valve install or replace your existing backflow valve, and we can perform regular maintenance as needed to keep it functioning properly. Contact us today for more information about our services!


FAQ / Tips


Whether you require simply deplete cleaning or a whole pipes registration.

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Why call Home Mechanics?

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Whether you require simply deplete cleaning or a whole pipes registration.

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate.

Whether you require simply deplete cleaning or a whole pipes registration.

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate.

Whether you require simply deplete cleaning or a whole pipes registration.

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate.