Schedule your sprinkler winterization between late September and mid-November, before the first hard freeze. Don't wait for freezing weather—popular time slots fill quickly. Schedule online now to secure your preferred date.
Professional Sprinkler Winterization in Denver
Protect your irrigation system from costly freeze damage with our professional sprinkler blowout service. We use commercial-grade compressed air equipment to completely remove water from your entire irrigation system.
Current Season: Sprinkler blowout services offered from September 26 until November 18 (or until first hard freeze).
Why Sprinkler Winterization is Critical in Denver
Denver’s freeze-thaw cycles can cause catastrophic damage to irrigation systems. Water left in pipes expands when it freezes, cracking pipes, valves, and fittings—even underground components. A single freeze event can cause hundreds or thousands of dollars in damage.
What Happens if You Don’t Winterize
- Cracked pipes: Underground PVC becomes brittle and cracks when frozen water expands
- Damaged valves: Valve bodies and diaphragms crack from ice expansion
- Broken backflow preventers: These expensive devices are especially vulnerable to freeze damage
- Split fittings: Elbows, tees, and couplings crack at stress points
- Costly spring repairs: Damage often isn’t discovered until spring startup
Many of the leaks we repair each spring stem from inadequate or skipped winterization the previous fall.
Our Professional Blowout Process
What We Do
- Shut off water supply to the irrigation system
- Connect commercial air compressor to the system
- Systematically blow out each zone using proper pressure and technique
- Drain backflow preventer and protect from winter weather
- Set controller to off or rain mode for winter
- Verify complete water removal from all zones
Why Professional Equipment Matters
DIY blowout attempts with small home compressors often fail to remove all water, leaving your system vulnerable. Our commercial equipment provides:
- Sufficient CFM (cubic feet per minute) to clear large-diameter pipes
- Proper pressure regulation to avoid damaging heads and components
- Consistent airflow to completely evacuate all zones
- Professional expertise to identify potential problems
Denver Neighborhood Considerations
Different areas face unique winterization challenges:
Cherry Creek & Wash Park: Older systems with thin-wall PVC require extra care during blowout to avoid pressure damage while ensuring complete water removal.
Highlands Ranch & Centennial: Larger systems with multiple zones require more time for thorough winterization.
Lakewood & Arvada: Clay soils retain moisture longer, making complete water removal especially important.
Aurora & East Denver: Variable elevations can affect water drainage patterns in irrigation systems.
Frequently Asked Questions
When is the best time to winterize my sprinkler system?
Schedule between late September and mid-November, before the first hard freeze. We recommend scheduling early—October appointments fill up quickly. Don’t wait for a freeze warning; by then it may be too late.
What happens if I miss winterization and it freezes?
If temperatures drop below freezing before winterization, don’t panic. Contact us immediately. Sometimes systems survive a light freeze, but the sooner we can winterize, the better. Damage often occurs during repeated freeze-thaw cycles rather than a single event.
Can I winterize my sprinkler system myself?
While possible, DIY winterization often fails to remove all water. Home air compressors typically lack the CFM needed to properly clear irrigation lines. Incomplete winterization can be worse than none at all, as remaining water can still cause damage.
How long does sprinkler winterization take?
Most residential systems take 30-60 minutes depending on the number of zones and system complexity. Larger properties with extensive irrigation may take longer.
Do I need to do anything before you arrive?
No special preparation is needed. We handle everything from shutoff to controller adjustment. Just ensure we have access to your backflow preventer and controller.
What about my backflow preventer?
We drain your backflow preventer as part of our service. Some homeowners also install insulated covers for additional winter protection, though proper drainage is the most important factor.
Should I turn my system back on in spring?
No! Never turn your system back on without a professional inspection. Winter damage may not be visible, and pressurizing a damaged system can cause catastrophic flooding. Schedule spring startup for safe system activation.
What if it’s already frozen when I call?
Contact us anyway. We may still be able to winterize the system if the freeze was brief and temperatures have risen. Even if some damage has occurred, winterization prevents additional damage from future freezes.
Spring Startup After Winterization
After winter, your system needs professional startup to:
- Check for any winter damage before pressurizing
- Properly activate the system to avoid pressure surges
- Adjust heads and verify proper operation
- Identify any repairs needed
Learn more about our Spring Startup Service
Schedule Your Sprinkler Blowout
Don’t risk expensive freeze damage to your irrigation system. Our professional winterization service protects your investment and ensures trouble-free operation next spring.
Schedule online now - Early scheduling recommended for preferred dates.
Service Area
We provide sprinkler winterization services throughout the Denver metro area including:
- Denver (all neighborhoods)
- Aurora
- Lakewood
- Littleton
- Englewood
- Centennial
- Highlands Ranch
- Arvada
- Westminster
- Thornton
- Cherry Creek
- Wash Park
- And surrounding areas