Water Distribution | Backflow Prevention

Learn about Distribution System Backflow Prevention in this excerpt from our Distribution Exam Review course.
Air Gap - 0:26
RPZ Backflow Preventer - 1:24
Double Check Valve - 5:51
Vacuum Breakers - 7:00
Atmospheric Vacuum Breaker - 7:37
Pressure Vacuum Breaker - 8:18
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[@busterhikney6936]

Accessable information like this WAS IMPOSSIBLE for regular water guys 25 years ago. Thanks

[@randuthekid1433]

Thank you my friend. I am taking plumbing classes at Apex and i appericate your knowledge and hard work on explaining these keys terms so simple.

[@lifeisgood12341]

the diagrams were great thanks for the post

[@cameronsams9183]

This helps a lot in fort shepherd

[@reganmorben9248]

If I could make one suggestion, I spent most of the video trying to figure out what illustration the narrator was referring to, you guys could really use a pointer or mouse to help this video out.

[@fernandofonseca8146]

Hy I have a question do I need a backflow preventer on a mobile home that’s haves a deep well?

[@ianvangiesen2523]

One confusing part. Near the end you mention that the pressure vacuum breaker can operate against backpressure 7:31) and then at 8:22 you mention that the PVB is NOT designed to protect against backpressure. This does not make sense, can you please clarify?

[@lordponzu9910]

PVB’s are only for backsiphonage and must be installed 12” above all downstream piping. They do not protect against backpressure. They definitely made a mistake by saying that it can protect against backpressure.