In Northern Colorado, most homeowners blow out their sprinkler systems from early October to early November, before sustained hard freezes. The goal is to clear water from lines, valves and the backflow preventer so freezing water can’t crack pipes or fittings, a repair that’s far more expensive than a blowout.
Why blowouts matter here
Front Range weather swings fast. A warm October afternoon can be followed by a hard overnight freeze. Water left in sprinkler lines and the backflow device can expand, crack and leak, often unnoticed until spring start-up.
Timing it right
- Water through early fall. Your lawn still needs moisture going into winter.
- Schedule the blowout once overnight lows regularly approach freezing, typically October.
- Don’t wait for the first big snow; early storms are common.
Pair it with a fall cleanup
We often combine sprinkler blowouts with fall leaf cleanup, a final mow and fall fertilization so your yard is fully winter-ready in one visit. See cleanups.
Frequently asked questions
When should I blow out my sprinklers in Fort Collins?
Typically from early October to early November, before sustained hard freezes.
Can I just turn the water off instead?
Shutting off the water doesn’t remove water already in the lines and valves. A blowout clears it out.
Do you offer sprinkler blowouts?
Yes, often as part of a fall cleanup visit.