This is a properly winterized Pressure Vacuum Breaker

This is a properly winterized Pressure Vacuum Breaker

By | Published November 3, 2013 | Full size is 717 × 960 pixels

Notice the partially open/closed shut off valves.
Notice the open test cocks.

This can only be properly winterized if you know where the isolation valve is. The isolation valve will have to be closed before you can place the device into this configuration. The isolation valve is usually close to your water meter (with in a 3ft radius). If you can’t locate it there, carefully check around the pressure vacuum breaker.

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