DIY Tips & Tricks Sprinkler Blowouts: Protect Your System This Fall

As temperatures drop, winterizing your sprinkler system is the single best way to avoid costly repairs next spring. Whether you do it yourself or trust the pros at Curb Appeal MDX, a proper blowout is crucial for Utah’s unpredictable weather.

1. Shut Off the Water Supply
Locate and close the main irrigation valve—typically found in your basement, crawlspace, or near the water meter—to stop any new water from entering the sprinkler system during winter.​

2. Release Pressure and Drain the Lines
Relieve pressure by opening the small test cocks or drain valves on your backflow preventer.​
Next, either:
Open manual drain valves zone by zone, or
Use an air compressor: For residential systems, keep the pressure under 50 PSI for poly pipe (and never over 80 PSI for rigid PVC).​
Attach the compressor to the blowout port, activate one zone at a time, and blow for about 30–90 seconds, or until only air comes out. Do not run air continuously longer, as this may overheat and damage sprinkler heads.​​
Let each zone rest between cycles, and repeat if necessary until all water is expelled.​

3. Protect the Backflow Preventer
Set the backflow preventer ball valves at a 45° angle to avoid trapping water and pressure.​​
Use the air nozzle gently to ensure the backflow is fully cleared.
Leave test cocks open all winter for drainage, and cover the unit with insulated material for added protection.
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4. Insulate Exposed Components
Wrap exposed pipes and your backflow preventer in foam insulation or breathable towels, secured with zip ties or tape. Avoid plastic that could trap moisture against the pipes.​

5. Know When to Call a Pro
Even a small mistake—like using too much air pressure—can crack pipes or damage valves, leading to expensive repairs. If you’re not confident or want peace of mind, let our licensed team at Curb Appeal MDX handle it. Our professional blowouts start at $95 and include scheduling, service, and follow-up with your homeowner dashboard—making it hassle-free.​

 
In Summary
Don’t wait until the first freeze: A thorough blowout is about more than turning off the water—it’s critical to your yard and wallet. Reach out to Curb Appeal MDX or do it yourself using the steps above, and rest easy knowing your irrigation system will be ready to go when spring arrives.

Curb Appeal MDX: Protecting your home, one season at a time.