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Sprinkler System Blowout & Water Shut-Off Valve Check

As colder weather approaches, it's critical to winterize your sprinkler system to prevent damage from freezing temperatures. Along with checking heat tape and insulation, please make it a priority to follow a sprinkler shutdown procedure and ensure your main water shut-off valve is operational.

Sprinkler Blowout Procedure Example

1. Turn Off the Sprinkler System Timer
    Deactivate your irrigation controller or set it to "rain mode" to prevent the system from activating during the winter.

2. Shut Off the Sprinkler Supply Valve and Main Water Supply Valve
    Locate the dedicated shut-off valves for your sprinkler system (often a ball valve near your main water line) and main water supply and close them completely.

3. Drain the System
    If you have manual drain valves, open them to allow water to flow out. For systems with automatic drain valves, activating one sprinkler zone may help begin the draining process.

4. Blow Out the Lines (If Needed)
    If your system retains water in underground pipes, use an air compressor to blow out each zone.

⚠️ Consider hiring a professional if you're not experienced with this — too much air pressure can damage the system.

5. Insulate Exposed Pipes and Backflow Preventer
    Wrap any exposed piping with foam insulation or use insulating covers to protect them from freezing temperatures.

6. Open main water supply valve


Check Your Main Water Shut-Off Valve

The main shut-off valve for your home or unit is one of the most important controls you have in the event of a burst pipe or emergency.

Please locate it now and test that it turns smoothly and fully closes. If it is corroded, stuck, or broken:

  • Communicate with the Town to turn your curb valve off for repairs
  • Schedule a plumber to replace or repair it before winter

A working shut-off valve can prevent thousands of dollars in water damage in the event of a frozen pipe or sprinkler failure. Don’t wait until it’s too late.


BLOWING OUT SPRINKLER LINES WITHOUT CLOSING THE MAIN WATER VALVE OR HAVING AN INOPERABLE VALVE CAN LEAD TO AIR IN THE MUNICIPLE MAIN DISTRUBUTION LINES. THIS CAN CAUSE DAMGES TO INFRASTRUCTURE OR OTHER HOMEOWNERS PROPERTY.