1. First, we shut off the main line or stop and waste valve.
2. Second, We hook up our commercial air compressor and run through
each zone to ensure that each zone is adequately drained.
each zone to ensure that each zone is adequately drained.
3. After, We set the sprinkler timer accordingly for winter use.
4. If necessary, we will open the bleeder valves.
5. Lastly, we shut down the backflow by turning the ports to open and
putting the ball valves to 45 degrees.
putting the ball valves to 45 degrees.
From: Sprinkler Master

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