Winterizing a Hunter Sprinkler System: Blow-Out Method with Air Compressor

DIY Winterization for Hunter System

Install a tee with a cap on the main irrigation supply line.
Shut off the main irrigation valve.
Connect an air compressor to the tee.
As pressure builds, manually open each zone valve one at a time to blow out all water through the heads.

Every system differs; this is the general principle. Consult a pro if unsure.

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