What typically needs to be done
- Winterization starts by shutting off the irrigation water source and placing valves/backflow components in the configuration required for that system.
- Water is drained from accessible components, and systems designed for compressed-air winterization are blown out zone by zone using equipment, pressure and airflow appropriate for the piping and heads.
- Backflow devices, exposed valves and above-ground piping are left in the manufacturer/installer-recommended winter position.
What you can check or prepare yourself
- Know where the irrigation shutoff, controller and backflow assembly are before the appointment.
- Turn off automatic watering and note any zones that already have leaks or damaged heads so they can be addressed before winter.
- Use manual drains only if you know the system was designed for them and follow the installer/manufacturer procedure; compressed-air work is better left to someone equipped to control pressure and flow safely.
Step-by-step reminder
- Shut down irrigation before sustained freezing weather.
- Drain or professionally blow out the system using the method appropriate for your equipment.
- Protect the backflow assembly as recommended for your installation.
Compressed-air winterization can damage equipment or cause injury when performed incorrectly.
Before you start
Review the manual for the exact appliance, system or material in your home before opening panels, disconnecting utilities, changing settings or using chemicals. Model-specific procedures and local installation details can differ from a general guide. Shut off power, water or fuel only when the manufacturer procedure calls for it and you are comfortable identifying the correct control. Stop if the condition you find is different from what is described here.
When to bring in a professional
The homeowner checks above can help you understand the condition of the system and prepare for service, but the higher-risk portion may require specialized tools, safe access, combustion/electrical knowledge, refrigerant work, pressure equipment or a qualified inspection. Use the typical-work list to understand what a proper service visit should cover, and hire the appropriate professional for work outside normal homeowner access.
This guide is general information, not a home inspection or a guarantee that a procedure is suitable for your specific equipment or conditions. Follow manufacturer instructions and applicable codes, stop if anything appears unsafe or different from the guide, and use a qualified professional when appropriate. Read the site terms and limitations.