Winter
Sprinkler Winterization and Backflow Tests in Northern Colorado
Updated · Kestrel editorial
Why backflows crack
Above-ground backflow preventers hold water in brass bodies that split when frozen. Draining and blowing out the system prevents it.
Timing
Early cold snaps can come in late September or October. Schedule before the forecast drops below freezing overnight.
Testing
A certified tester checks the assembly and files the report with your provider. See backflow testing.
Spring startup
When turning irrigation back on, open the main slowly, check the backflow assembly for cracks and leaks, and run each zone to look for broken heads. Many Front Range water providers require annual backflow testing by a certified tester.
Sprinkler Winterization and Backflow Tests in Northern Colorado: follow-up questions
When should I blow out my sprinklers in Northern Colorado?
Before the first hard freeze, commonly by mid-October along the Front Range; earlier at higher elevations.
Can a frozen backflow preventer be repaired?
Sometimes parts can be replaced; a cracked body usually means replacing the assembly.
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