Best Practices for Winterizing Your Irrigation System

When to Winterize Your Irrigation System

Timing plays a major role in proper winterization. The system should be winterized before the first hard freeze of the season. In many regions, this means early to mid-fall, depending on local climate conditions.

Determine the weather and begin winterizing when the nighttime temperatures are approaching freezing. Wait too long, and you can even cause freeze damage even when the system is not being used.

With cold weather, winter comes earlier. In milder climates, the system can be left on longer, though you still need to be ready as soon as the temperatures reach freezing.

Step-by-Step Best Practices for Winterizing

The primary winterization would be to shut off the water and drain the system. The steps can be varied according to the system design; however, the following rules apply to most irrigation systems.

1. Shut Off the Water Supply

The first step in winter irrigation care is turning off the main water supply. This prevents new water from entering the system during winter.

The shut-off valve is usually located in a basement, crawl space, utility room, or underground valve box. Once you turn the water off, switch off the irrigation controller or switch to rain mode so that it does not switch on during cold weather.

2. Drain All Water from the System

The most essential aspect of winterization is removing water from the system. Any trapped water, however little, can be destructive. Commonly used ways of draining irrigation systems are:

• Manual Drain Method: Open the manual drain valves to allow water to be pumped out of the pipes. It is most effective on systems with the right slope and drainage points.
• Automatic Drain Valves: These open when water pressure decreases. They work; however, they are not sure they can drain all the water from every system.
• Blow-Out Method: Compressed air can also be used to drive the water out of the sprinkler heads. This is among the best practices when properly practiced. You should follow caution with the air pressure to avoid damaging the pipes or sprinkler heads.

3. Protect Above-Ground Components

The parts above ground require additional protection during winter. Once the system has been emptied, wrap exposed pipes and valves with foam or insulation covers. 

Backflow preventers must be given special consideration. Vacuum them and seal them with weatherproof covers. When they are left unguarded, they can be severely damaged, and restoring them is costly. Check sprinkler heads to be sure that they are empty and not burnt before winter sets in.

4. Perform Final System Checks

Final checks follow the draining and insulating of the system. Keep the drain valves open to drain any remaining water. Switch off the controller during the entire winter. 

It is now time to check the system for worn parts, cracked heads, or loose fittings. Early detection of issues will simplify and streamline spring start-up, especially if you adjust sprinkler heads for even lawn coverage during spring start-up.

Common Mistakes to Avoid

Most of the winter problems occur as a result of some basic errors:  

• Waiting for the first freeze to pass. Even before you begin winterizing, a late cold night may freeze the pipes.  
• Omitting the anti-backflow valve. This component is expensive and the first body part to fail, as it is not covered.  
• Incomplete drainage as water may remain stagnant in low areas, end caps, or valve assemblies.  
• Consumption of excessive compressed air. Pipes and fittings can be broken by high pressure, and repairing them can cost just as much as winterization is intended to prevent.  
• Forgetting the controller. A controller left on during winter can switch a zone on and replenish the lines with water.  

When to Hire Experts for Winterizing Your Irrigation System

When the weather is very cold or the system is complex, it is a good idea to hire experts. The assistance of a professional is usually required in cases where:

• Blowing out the system is required, but the necessary compressor or equipment is unavailable.
• The system's backflow preventer should be drained carefully and guarded.  
• The system contains numerous zones, unknown lower points, or an indistinct layout.  
• Winters in the past have either resulted in freeze or spring leakages.  
• You do not know which air pressure is safe or what should be done to winterize.  

Benefits of Hiring Winterizing Experts

Official winterizing may save money and decrease stress over time.  

• Complete Water Removal: Professionals empty the lines, zone after zone, to reduce the chances of stagnant water.  
• Lower Risk of Accidental Damage: Pros have the appropriate tools and pressure settings.  
• Protection of Key Components: Backflow and valves, and open elements are well maintained.  
• Early Problem Detection: Small cracks, incorrect valves, or loose fittings would be identified, preventing deterioration during the winter.  
• Faster Spring Start-up: A winterized system can be easily restarted and is less likely to leak.

When it is time to winterize, schedule a licensed irrigation technician today and request a complete winterization service, which would include turning off, blade-out (where necessary), backflow prevention, and a final review of the system.

The Bottom Line

Ensuring the presence of an irrigation system before winter ends helps prevent frozen pipes, valve damage, and expensive spring repairs. The system is safe in winter because it is properly drained and covered over the exposed areas, and is ready to work smoothly once winter ends.

Disclaimer: This material is for informational purposes only and should not be relied on for legal, medical, financial, or any other form of professional advice.