
How to Open Irrigation System the Big Approved Way
Opening your irrigation system properly ensures your lawn and garden get the water they need without any costly leaks or damage. If you’re a homeowner or a landscaping enthusiast, knowing how to open irrigation system correctly can save you time, money, and frustration. Follow this guide for a step-by-step approach to safely and efficiently starting your system.

Why Properly Opening Your Irrigation System Matters
Avoiding sudden pressure surges, ensuring even water distribution, and preventing unexpected leaks are just a few reasons why carefully opening your irrigation system is crucial. Failure to follow the right steps may result in damaged valves, broken pipes, or an ineffective system.
Tools and Materials You’ll Need
- Adjustable wrench
- Flathead screwdriver
- Pliers
- Pressure gauge
- PVC pipe sealant
- Gloves
Step-by-Step Guide to Opening an Irrigation System
1. Check for Winterization Precautions
If your system was winterized, ensure you remove any insulation or coverings from valves and pipes. This helps prevent blockages and allows for smooth water flow.
2. Inspect the System for Damage
Before turning on the water, inspect the main lines and valves for visible cracks or leaks. If you find a leak, check out how to fix PVC pipe leaks before proceeding.
3. Slowly Turn On the Water Supply
Gradually opening the main irrigation valve prevents sudden pressure build-up, which could damage your pipes. Open it slowly to allow the water to fill the system gently.
4. Bleed Air from the System
Air trapped in the irrigation pipes can cause pressure buildup and damage the system. Open the farthest valve first to let trapped air escape until a steady water flow is achieved.
5. Test All Sprinkler Zones
Run each irrigation zone separately and check for clogged sprinkler heads, uneven pressure, or broken parts. If any zones aren’t performing well, you may need to clear blockages manually or replace a faulty nozzle.
6. Adjust the Water Pressure
Use a pressure gauge to ensure your system maintains optimal water pressure. Most systems operate best at 30-50 psi. If pressure is too high, install a pressure regulator to prevent damage.
7. Reprogram the Controller
Set your irrigation timer to match seasonal watering needs. If you need guidance on timing, refer to when to turn on an irrigation system.
8. Perform a Final Leak Inspection
Walk around the system and inspect all components for any leaks or unusual damp spots. If necessary, apply PVC pipe sealant to secure any minor leaks.
Common Issues When Opening an Irrigation System
Clogged Sprinkler Heads
If some sprinkler heads don’t spray properly, they may be clogged with dirt or debris. Remove, clean, and replace them as needed.
Low Water Pressure
A sudden drop in water pressure could indicate a blocked or broken pipe. Check for leaks and clear any debris that could be causing the issue.
Leakage Around Valves
Leaks around valves often occur due to worn-out washers or loose fittings. Tighten the connections or replace damaged parts.
Freezing Damage (For Cold Climates)
If the system was not properly winterized, frozen water may have expanded and cracked the pipes. Consider protecting your irrigation system from freeze in future cold seasons.
Final Thoughts
By following these steps, you ensure your lawn receives proper irrigation without damage to your system. Regular maintenance and a careful opening process help keep your irrigation system efficient and trouble-free throughout the watering season.

FAQ
1. How often should I open my irrigation system?
Most people open their systems at the start of spring. However, in mild climates, it can run year-round with periodic checks.
2. Can I open my irrigation system myself, or should I hire a professional?
If you’re comfortable with basic plumbing tasks, you can do this yourself. However, if unsure, it’s always best to hire a professional.
3. What should I do if my irrigation system is leaking?
If you notice leaks, turn off the water supply and locate the issue. A simple fix may include tightening connections, but larger leaks may require replacing parts or using a PVC sealant.
Learn More About Irrigation
For additional insights on irrigation techniques, visit Wikipedia’s irrigation guide.
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