Landscaping

Irrigation System Winterization Form

A single frozen valve can crack a manifold and cost a homeowner thousands in spring repairs. This winterization form ensures every zone gets properly blown out, the backflow device is isolated, and the controller is correctly programmed — with the documentation that protects your company when a client claims it was not done.

18 Questions

~20 min To complete

4 Sections

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System & Site Information

5 questions

Customer name and address Required Text

Thomas & Elaine Burrows — 2204 Cottonwood Pass, Fort Collins, CO 80524

Winterization date Required Date

2024-10-18

Technician name Required Text

Jake Wren, Greenscape Irrigation

Number of irrigation zones Required Number

System type Required Select

Mixed drip + spray

Zone-by-Zone Blowout

5 questions

All spray/rotor zones blown out with compressed air? Required Yes / No

Yes

All drip zones purged? Required Yes / No

Yes

Any heads cracked, missing, or not retracting? Required Yes / No

Yes Zone 4 — one rotor head cracked. Replaced on site. Photo attached.

Photo of cracked / damaged head Photo

📷 Photo attached

Compressor PSI used during blowout Required Number

50 Safe range: 40–50 PSI for spray zones; do not exceed 50 PSI for drip.

Backflow Preventer & Main Supply

4 questions

Backflow preventer type Required Select

Pressure Vacuum Breaker (PVB)

Backflow ball valves closed to 45° (winterized position)? Required Yes / No

Yes

Isolation valve to irrigation main shut off? Required Yes / No

Yes

Backflow — drain ports opened to relieve pressure? Required Yes / No

Yes

Controller & Final Verification

4 questions

Controller set to "Rain" or "Off" mode? Required Yes / No

Yes Clock and program retained. Only run mode disabled.

Spring start-up date confirmed with customer? Yes / No

Yes Scheduled for week of April 14, 2025.

Customer walked through what was done? Required Yes / No

Yes

Additional notes Text

Zone 4 rotor replaced. Recommend replacing backflow PVB bonnet before spring — cap is showing wear.

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