This is a new backflow assembly

 

New-backflow-assembly

 

 

 

 

 This backflow assembly is being tested.

 

Backflow-Assembly-Testing

 

 

 

 

 This backflow assembly has been tested, and is tagged.

 

Tagged-Backflow-Assembly

 

 

 

 

Check valve # 1 stuck open because of debris. This is a double check assembly; this means it has no relief valve with debris holding it open. This failure would never be known without testing.

 

Check-valve-with-debris-1

 

Check-valve-with-debris-2

 

 

 

 

This check valve was damaged by freezing; note the cracks. Another failure that would go undetected without inspection.

 

Check-valve-that-froze-during-the-winter-1

 

Check-valve-that-froze-during-the-winter-2

 

 

 

 

It is easy to see the difference between the new valve and the bad one.

 

Valves-1

 

Valves-2

 

 

 

This cracked shutoff valve failure is obvious...

 

Cracked-shut-off-valve-on-backflow-assembly