How do I winterize my sprinkler system?
We do not recommend winterizing your own sprinkler system unless you are
completely familiar with all shut-off valves, backflow device, blow-out ports,
extra lines or faucets, or any other unique features that were installed onto
- You must have an adequate sized compressor - minimum 2hp or 12 cfm
@40ps. is recommended. If your system was properly installed, the design should
be straightforward and easy to winterize.
- Please refer to the diagram, "Backflow Device ."
- Turn off the main sprinkler shut-off valve in basement.
- Connect an air compressor (minimum 2 hp compressor or 12 cfm @ 40ps.
recommended) to the sprinkler blowout port, which is usually just before the
backflow device outside.
- At the sprinkler timer, turn on one zone at a time until only "fog" comes out
of each sprinkler head.
- When finished with all zones, open the bleed ports on the backflow device
momentarily to empty all the water from it.
- Go through the entire system a second time. Turn off and disconnect the
- Close the blow-out port.
- Turn off the timer, but do not unplug it.
- KEEP IN MIND - older systems or those that were not installed according to
proper design standards may have more than one shut off and/or blow-out port. If
you have any doubts about your system, contact Horizon or your local licensed
irrigation professional to avoid costly freeze damage.
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