Backflow Preventer Installation on the Main Drain Line.

Usually for instance like in the front yard on the SEWER MAIN before it goes out to the street. This Will stop anything from coming back into the house.

 

So you find the Main (here in the city of San Diego they also have what is called pipe location with the San  Diego Gas and Electric Company.) They don’t charge also for the locating of the pipes underground.

 

Just in case so this way you won’t hit any pipes underground when digging for the Main Drain.

Once you’ve located the pipe should be cut and the Backflow Preventer Installed  on the Main Drain Line.

Making sure to install in the direction the drain is exiting the property.

 

Basically, it has a flapper inside, looks like coupling with a flapper inside. Which in some cases certain houses get flooded out often. And this prevents this from occurring.

 

There are actually several types of water backflow preventers that can be used on a house for instance a backflow preventer on a hose bibb. (Or where you connect the water hose outside in the yard.)

 

So nothing goes back into the House and does not contaminate the Water Supply. Or Backflow preventers on your irrigation…

 

When you see out in the yard PVC piping or sticking out of the ground with valves. Those are backflow preventers.

 

They will usually be a minimum of 12″ inches above the ground. This is for the PREVENTION, of Contamination of the Potable water source.

 

Consequently, you have many situations that this is applicable to like water backflow prevention device’s in the public venue. etc…

 

It is always recommended that The work should be done by a professional.