Understanding Your Backflow
Are you looking at your backflow preventer, wondering what all these moving parts do?
OPEN
CLOSED
Test Cocks
If the slot is vertical, it's in the open position. If the slot is pointing horizontally, it's in the closed position. There are two times these should ever be open. During the test procedure and during winterization.
Test Cock Location
Each backflow has a total of four test cocks they can be located on the top or on the side of your backflow valve.
Shutoff Handles Open (ON)
Both shutoffs are parallel to the assembly. This allows full flow of water through the assembly to the service line.
Shutoff Handles Closed (OFF)
Both shutoffs are perpendicular to the assembly. This stops any flow of water through the assembly and the line it is servicing.
One Shutoff Closed (OFF)
One shutoff is perpendicular to the assembly. This stops any flow of water through the assembly and the line it is servicing.
Isolation Valve (Secondary Shutoff)
Isolation valve or secondary shutoff is a shutoff valve for your irrigation system. It's commonly used for the winterization process or emergency situations. If your shutoffs are in the open position and your system won't turn on, look for one of these. They can be located next to the water meter as well.