When the temperature reaches the frost level, it affects the irrigation system under the ground. The low temperature may damage the pipes and sprinkler system by freezing the water in them, which may cost several hundred dollars to fix or replace. Hence, it is advisable to shut off the sprinkler system to avoid freezing the parts and components of the watering system, which could lead to cracks and damage.
Also, it is important to drain all the water from the pipes to prevent freezing. So, here is a guide to help you learn how to blow out the sprinkler system to protect it from cracks and leaks caused by freezing.
A Guide To Blowing Out Sprinkler System
There are several ways to blow out a sprinkler. Here are a few methods that can help you complete the task -
Tools Required For Blow Out Methods -
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Bucket
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Air Hose
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Air Compressor
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Quick-Convenient Hose Adaptor
For automatic and manual blow out, you need -
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Bucket
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Channel Lock Pliers
Blow Out Methods
It is important to have certain tools handy when trying to do so. Also, it is advisable to only attempt to blow out the sprinkler system if you’ve enough experience in doing so. Even a minor mistake can lead to severe damage if the water line bursts due to heavy air pressure.
Once you have the tools ready, here’s how you can do it:
Step 1: Turn Off Valve And Drain The Water Line
Turn off the isolation valve to prevent water from flowing into the pipes from the main line. Near the isolation valve, you’ll find a hose bib (a small faucet). These are located either inside the home or outside before the backflow preventer. Now, place a bucket under the faucet and open the hose bib. Drain all the water from the main sprinkler and ensure none is left.
Step 2: Switch Off The Timer
Also, it is important to turn off the timer when the irrigation system is not in use to reduce the risk of electrical or mechanical faults. Sometimes, the timer can be set to rain mode to remind you that it’ll be raining. In spring, it can again be turned off to resume the regular water supply.
Step 3: Prepare The Air Compressor
It is important to prep the air compressor before attaching it, as this prevents damage to the sprinkler. The compressor must produce air at 40 PSI (pound per square inch) to clear the water from the pipes. However, if the pipe is made of PVC material, it is recommended not to exceed 80 PSI. In the case of polyethylene pipes, it is advisable to keep the pressure below 50 PSI.
Step 4: Attach The Air Compressor
Once the air compressor is regulated, connect it to the irrigation system with an air compressor blowout adapter. The adapters are also used to winterize RVs, so they are quite convenient to use. Also, there are chances the system has a built-in quick coupler that can be directly connected to an air hose.
Step 5: Open The Sprinklers
Some air compressors cannot blow out the system without damaging its pipes. The best way to do the job is to open each sprinkler at a time. Opening the sprinkler makes a pathway for the air to travel and water to escape. Start with the highest zone and then gradually come down.
Step 6: Blow The Sprinkler Line
Start by opening the compressor valve and adding air pressure as needed. You’ll see a spray of water coming out. Continue until there is no water left. Repeat the process at least once until all the water is out of the system. Once done, turn off and disconnect the compressor.
Manual Methods
The irrigation system also comes with manual drainage. Hence, it allows the system to empty any water just by opening the valve. Here’s how to do it:
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Shut off and drain the water line.
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Look for the manual valves at the pipes' end and low point.
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Open all the valves and drain the water from the system.
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Ensure to drain the backflow device as well.
Some sprinklers also have check valves, which allow the water to flow only in one direction. Try raising the sprinkler head to drain the remaining water out of the system. Once you've done this, close all the valves.
Automatic Methods
Some drain systems have automatic drainage. Here’s how to activate an automatic drain function:
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The first step is to turn off the water supply.
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Run one of the sprinkler heads to release the water pressure in the system.
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Once this happens, the automatic draining will begin, which clears the pipes of excess water.
Conclusion
Planning and protecting the irrigation and water system before winter hits is good. Apart from the irrigation system, inspect and assess all the watering tools, such as the hose, O-rings, etc. Add insulated covers to keep the water from freezing during winter. These small measures can help you save money in the long run. If required, take professional help to ensure the pipes and the sprinkler system are in good condition.
