DIY Guide: How to Winterize Your Sprinkler System Like a Pro

Winterizing your sprinkler system is a crucial step to protect it from potential damage and expensive repairs. This comprehensive guide will walk you through the essential steps and provide tips to help you winterize your sprinkler system like a pro.

When to Winterize Sprinklers

The ideal time to winterize your sprinkler system may vary depending on the climate and frost dates in your region. It's generally recommended to schedule winterization before the first freeze or when temperatures consistently drop below 40 degrees Fahrenheit (4 degrees Celsius).

What You Need for Sprinkler System Winterization

Proper winterization of your sprinkler system requires the right tools and materials. Here is a comprehensive list of essential items you will need:

• Air Compressor
• Wrenches
• Insulation Materials
• Drain Valves
• Automatic Drain Valves (optional)

The Sprinkler Winterizing Process

Inspect Your Sprinkler System

Before proceeding with the winterization process, it is essential to conduct a thorough inspection of your sprinkler system. This step allows you to identify any existing issues, leaks, or damaged components that need attention before winter sets in.

Start by visually inspecting all components, including sprinkler heads, pipes, valves, and connections. Look for signs of leaks, cracks, or damage that could lead to water wastage or system inefficiencies. If you notice any issues, make a note of them to address during the winterization process, or consider scheduling repairs beforehand.

Pay special attention to vulnerable areas, such as above-ground pipes or exposed fittings. Check for signs of corrosion, cracks, or wear and tear. These areas are particularly susceptible to freezing and damage during winter, so it is essential to address any issues beforehand.

Lastly, inspect the surrounding landscape. Clear away any debris, rocks, or roots that could potentially cause damage or block the flow of water.

Shut Down the Water Supply

Start with shutting down the water supply to your sprinkler system.

1. Turn Off the Water Supply: Once you've located the main shut-off valve, use a wrench to turn it in a clockwise direction. Ensure that the valve is fully closed to prevent any water from flowing into the system.
2. Release Pressure: Go to the irrigation control box and run each zone for a short period (about 1-2 minutes). This will release any remaining water pressure in the system and prevent potential leaks or damage during the winter months.
3. Check for Water Flow: Walk around your property and check for any water flow from the sprinkler heads or pipes. If you notice water still coming out, revisit the main shut-off valve and make sure it is fully closed.

Turn Off the Timer

To ensure that your sprinkler system doesn't operate automatically during winter, it is important to turn off the timer or controller. Follow these steps to properly turn off the timer and prevent any unnecessary watering:

1. Power Off the Timer: Depending on the type of timer/controller you have, there are different ways to turn it off. Look for a power switch or button labeled "Off" or "System Off." Switch it off or press the button to disable the automatic operation of your sprinkler system.
2. Disable Automatic Schedules: Access the programming settings on your timer/controller and disable any automatic schedules or watering programs. This ensures that the system does not activate on its own during the winter season.
3. Set to "Off" or "Rain Mode": Some timers/controllers have an "Off" or "Rain Mode" setting specifically designed for winterization. Switch the timer/controller to this mode to deactivate all watering functions.
4. Disconnect the Power Source: To further safeguard your sprinkler system, disconnect the power source to the timer/controller. This step prevents any accidental activation or electrical issues during winter.

Drain the Water From the System

Depending on the type of system you have, there are three main methods of draining water: manual draining, automatic draining, and blowout draining.

Manual Draining

Manual draining is an effective method to remove water from your sprinkler system before winter. Follow these steps to manually drain the water using drain valves:

1. Locate the Drain Valves: Your sprinkler system should have drain valves at low points in the pipes or near the backflow preventer. Locate these valves, which are typically brass or plastic and have a cap or handle.
2. Open the Drain Valves: Using a wrench or your hand, open each drain valve by turning it counterclockwise. This allows water to flow out of the system. Start with the valve furthest from the water source and work your way back to ensure all zones drain properly.
3. Allow Water to Drain Completely: Leave the drain valves open until all water has drained from the system. It may take a few minutes for the water to flow out completely. Once you no longer see water flowing, close the drain valves by turning them clockwise.

Automatic Draining

Alternatively, some sprinkler systems are equipped with automatic drain valves, which make the process more convenient. If they are already in place, you do not need to take any additional steps to activate them.

Blowout Draining

Blowout draining is another method commonly used to remove water from sprinkler systems. It involves using an air compressor to blow out water from the system. It is highly recommended to hire a professional for this method to prevent any potential damage.

Here's an overview of the blowout draining process:

1. Attach the Air Compressor: connect the air compressor to the system's mainline or an air hose connection point using the appropriate fittings. This allows the compressed air to be directed through the sprinkler system.
2. Gradually Increase the Pressure: gradually increase the air pressure to a level suitable for your specific sprinkler system, starting with the farthest zone from the compressor connection and gradually moving closer.
3. Blow Out the Water: open each zone's control valves one at a time, allowing the compressed air to blow out the water. This process removes water from the pipes, sprinkler heads, and other components.

Insulate Your Sprinkler System

Insulation helps safeguard certain components from freezing temperatures, reducing the risk of damage and costly repairs. Focus on insulating the following key components of your system:

Backflow Preventers

Backflow preventers are particularly susceptible to freezing because of their exposed location. Use insulation materials specifically designed for backflow preventers, such as insulated pouches or foam covers.

Above-Ground Pipes

To protect them, use foam pipe insulation or heat tape. Foam pipe insulation is simple to install and comes in various sizes to fit different pipe diameters. Heat tape is particularly useful for areas with extremely low temperatures, as it provides constant low-level heat to keep the pipes from freezing.

Valves and Control Boxes

Insulate valves and control boxes using weather-resistant covers or boxes.

Sprinkler Heads

Though not always necessary, insulating above-ground sprinkler heads can offer additional protection. Use foam insulating covers that fit over the sprinkler heads to shield them from freezing temperatures.

When insulating your sprinkler system, ensure that the materials you use are suitable for outdoor use and can withstand the weather conditions in your area. Additionally, regularly inspect the insulation to ensure it remains intact and replace any damaged or worn-out materials promptly.

Why You Need to Winterize Your Sprinkler System

Winterizing your sprinkler system is not just a recommended practice; it is essential to avoid potential damage and costly repairs. It will save you valuable time and effort in the long run. Here's why winterizing is crucial:

Prevent Pipe Bursts

When water freezes inside the pipes, it expands, putting immense pressure on the system. This can lead to pipe bursts, causing extensive damage to the underground and above-ground components.

Protect Valves and Components

Valves, backflow preventers, and other system components are vulnerable to freezing temperatures. The expansion of frozen water can cause cracks, leaks, or even complete failure of these vital parts.

Avoid Costly Repairs

Repairing a sprinkler system can quickly add up in terms of expenses. Not only will you need to fix or replace broken pipes, valves, or other components, but you may also have to deal with repairing any damage caused to your property, such as landscaping or hardscaping.

Sprinkler Winterization FAQs

Q: How Much Does It Cost to Winterize My Sprinkler System?

The national average cost of sprinkler winterization is $90, with most sprinkler systems costing $60 to $120 to winterize. It can vary depending on various factors such as the size and complexity of your system, local service rates, and any additional services required.

Q: How Can I Stay Safe When Winterizing My Sprinkler System?

Here are some essential safety tips to follow:

Wear Protective Gear: Wear appropriate protective gear such as gloves, safety goggles, and sturdy footwear to protect yourself from potential injuries.

Use Caution with Electricity: If your system involves electrical connections or a timer/controller, take extra care when disconnecting or working with them. Turn off the power source to avoid electrical hazards.

Follow Guidelines: If you decide to winterize your sprinkler system yourself, follow the manufacturer's guidelines and best practices. If you are uncertain about any step, it's best to consult a professional.

Q: Should I remove sprinkler heads for winter?

In most cases, it is not necessary to remove sprinkler heads for winter. Modern sprinkler heads are designed to withstand freezing temperatures. However, it is crucial to ensure that the heads are properly retracted and flush with the ground to avoid any potential damage from frost heaving.

Q: Can I leave water in the pipes if I live in a mild winter climate?

Even in mild winter climates, it is generally recommended to fully drain the water from the sprinkler system. While the risk of freezing may be lower, unexpected cold snaps can still occur, leading to potential damage.

Q: How long does it take to winterize a sprinkler system?

The time required to winterize a sprinkler system can vary depending on factors such as the size of the system, its complexity, and the method chosen for winterization. On average, it can take a professional technician anywhere from 30 minutes to a couple of hours to complete the winterization process.

Extra Tips for Maintaining Your Sprinkler System

Maintaining your sprinkler system is essential for its long-term performance and efficiency. Here are some additional tips and best practices to keep your irrigation system in top shape throughout the year:

Regular Inspections

Check for leaks, clogged nozzles, and misaligned sprinkler heads.

Adjusting Sprinkler Heads

Periodically adjust the position of sprinkler heads to ensure proper coverage and avoid overspray onto hardscapes or buildings.

Monitoring Watering Schedule

Keep a close eye on your watering schedule and adjust it according to seasonal weather conditions. Smart controllers can help automate this process by adjusting watering schedules based on weather data and soil moisture levels.

Checking Water Pressure

Ensure that your sprinkler system operates at the right water pressure. Use a pressure gauge to verify that the pressure falls within the recommended range for your system.

Avoiding Mowing Damage

Be cautious when mowing your lawn to prevent accidental damage to sprinkler heads and irrigation lines. Mark the locations of the underground components to avoid mowing over them, or consider installing protective collars around the sprinkler heads.