Water expands approximately 9% in volume when it freezes. In a sealed PVC pipe, that expansion generates pressure exceeding 2,000 PSI—far above the 100–150 PSI rating of standard irrigation pipe. The result is cracked pipes, shattered backflow preventers, and split valve manifolds that require costly excavation and replacement. At Incline Village's 6,200-foot elevation, the first hard freeze can arrive by mid-October, leaving a narrow window for proper system shutdown.
Lakescaping LLC has performed irrigation winterization at Lake Tahoe properties for over 33 years. Our protocols are based on manufacturer specifications for Rainbird and Toro systems and refined by decades of post-winter assessment of what works and what doesn't at extreme altitude.
Before beginning the blow-out procedure, our technician performs a complete system check:
Issues identified during inspection are documented for the homeowner and can be addressed during the spring startup or immediately if urgent.
The compressed air blow-out method is the only reliable way to remove all water from an irrigation system at Incline Village elevations. Gravity drain alone cannot remove water from all pipe orientations and trapped low points.
We use a commercial-grade, trailer-mounted 185 CFM air compressor. This volume is critical—residential compressors (typically 5–10 CFM) cannot generate sufficient airflow to effectively purge irrigation lines. The compressor connects to the system through the mainline blow-out port or the backflow preventer blow-out valve.
With the water supply shut off at the main isolation valve, each zone is activated in sequence. We apply 2–3 cycles of compressed air per zone, allowing the compressor to recover between cycles. Critical parameters:
The backflow preventer is one of the most vulnerable components to freeze damage. Our winterization procedure includes:
Drip zones require specific additional steps beyond the standard blow-out:
After all zones have been purged:
After winterization, homeowners should be aware of a few ongoing risks during the winter season:
Exposed above-grade pipe: If any above-grade pipe runs exist (common in older installations), monitor these for damage during extreme cold events. Insulated pipe wrap provides some protection but is not a substitute for proper burial depth.
Backflow preventer covers: Commercial-grade insulated covers are available for exposed backflow assemblies. We recommend these for any backflow preventer not protected by a structure or grade.
Freeze events after shutdown: If an unexpected warm spell causes you to run the system after winterization, contact us for a re-blow-out before temperatures drop again.
Lakescaping LLC (Nevada C-10 #0086320) has served property owners in Incline Village, Crystal Bay, Glenbrook, and Zephyr Cove for 33+ years. Contact us for a no-obligation on-site consultation.
Serving Nevada properties only — Incline Village, Crystal Bay, Glenbrook, and Zephyr Cove.
We recommend completing winterization by October 10th to provide a buffer before the first hard freeze. Historically, Incline Village sees its first temperatures in the mid-20s°F in late October, but early season freezes can occur. Scheduling your winterization in August or September ensures availability.
For standard residential irrigation systems, a minimum 50 CFM compressor is needed. For systems with more than 8 zones or long lateral runs, 100–185 CFM is required for effective purging. We use trailer-mounted commercial compressors to ensure complete water removal from all zones and pipe configurations.
Many homeowners attempt DIY winterization, but the most common failure is using an undersized compressor that cannot generate sufficient airflow to purge all water from every pipe orientation. Using a residential air compressor (5–10 CFM) often leaves water in low points that freezes and causes damage. Professional winterization with commercial equipment costs $150–$300 and prevents thousands of dollars in repair costs.
A backflow preventer is a valve assembly that prevents irrigation water from flowing back into the potable water supply. It is required on all irrigation systems in Washoe County. The assembly is typically installed above grade and is one of the most vulnerable components to freeze damage. Proper winterization involves closing the isolation valves, draining the test ports, and insulating the assembly.
Yes. Our spring startup service includes slow pressurization of the system to check for winter damage, inspection and replacement of damaged heads and emitters, controller re-programming, backflow preventer certification, and a full system operational test. Annual contracts combining fall winterization and spring startup receive preferred pricing.
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