Backflow preventer and check valve installation for house sewer line
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What Are a Sewer Backflow Preventer and Check Valve?
A sewer backflow valve prevents backflow from a municipal drainage system or city sewer into your house. A check valve is a type of preventer. However, it may not be the most effective type, depending on your situation.
Backflow preventers are a crucial part of your home as they help to keep it sanitary by making sure your plumbing doesn’t contain contaminated water. With a backflow valve, you will also avoid expensive repair from damages.
What Causes Sewer Backflow?
Wastewater flows in the direction of the slope of the pipe. Here’s how backflow can be caused:
In commercial or residential properties, blockages are often caused by grease, hair, physical obstructions, toilet paper, napkins, etc. A blockage can also occur due to plumbing system deterioration.
In your neighborhood, insufficient capacity due to any residential growth can contribute to backflow.
Heavy Rain or Snow Melt
When snow melts, or you get heavy rain, your sewage system may get backed up because your public sewer system becomes surcharged.
Why Do I Need a Backflow Preventer?
Types of Backflow Valve Devices
Sewer Check Valve
A check valve is typically the least expensive option and the most common. It does not offer 100% prevention of backwater, so it’s only ideal for short-term backups that last less than a day. When the backflow recedes, the valve will automatically allow the wastewater from your property to escape and run out to the public sewer.
Automatic Flood Gate Valve
This is the most sophisticated valve and offers a 100% effectiveness in stopping wastewater and the damage associated with it. An automatic flood gate works using air pressure.
Manual Sewer Gate Valve
This valve must be opened and closed manually. You must anticipate when a backwater condition will happen and when it has receded. The chances of misuse with this device can cause damage, so it’s only meant to be used for very particular situations.
Air Gap Backflow Preventer
An air gap is a vertical space between the device that connects to a plumbing system. There are no moving parts in an air gap, except for flowing water. Plumbing codes may specify the minimum air gap distance for specific types of fixture.
Specialized Backflow Preventer
This preventer is commonly installed close to a residential water meter and only when there is no sufficient vertical space to add an air-gap separation.
Backflow Preventer Valve Installation
A backflow preventer should be installed only by licensed plumbers because if they are installed incorrectly, they won’t work and the warranty will be void. Certain installations, such as an automatic flood gate valve need to be considered and planned carefully.
Backflow Preventer Installation
These valves have many moving parts and need to be tested for efficiency so that the health of your family is not endangered. Some models also require specialized tools that can only be used by a professional plumber.
Proper valve installation is necessary because of the health implications of sewer backwater. Wastewater carries tons of risks. Once this filth enters your home, you will require a professional cleaning service, and the cost of proper cleanup is much higher than the cost of a proper sewer valve installation.
Do you need a backflow preventer installation? Not sure which one to get? Call the experts at Alpine Plumbing and Rooter today.