Sprinkler spring startup in Colorado is not as simple as turning the water back on. If you rush it, you risk blown heads, cracked pipes, and a soggy yard before the season even gets going.
Along the Front Range, we see hard freezes well into April. Longmont, Fort Collins, and Boulder all sit at elevations where a 28-degree night in late April is not unusual. Most homeowners see a stretch of warm days in March and assume winter is done. It is not.
Wait until nighttime temperatures are consistently staying above freezing before you pressurize the system. One freeze after startup forces water back into your pipes and manifold. That pressure has nowhere to go, and something breaks. The repair bill is always more painful than the extra two weeks of waiting.
Here is something most homeowners do not know: the soil in Colorado's clay-heavy areas, especially along the Front Range foothills, stays cold longer than the air above it. Your pipes sit in that cold ground. Even when it feels like spring outside, the ground is still working through freeze-thaw cycles that started in November.
First, locate your backflow preventer and main shutoff valve and make sure both are intact. Winter contraction and freeze-thaw movement can crack a backflow preventer without any visible sign until you pressurize the system. Inspect it before you turn anything on.
Next, open the main valve slowly. Colorado water pressure tends to run on the high side, and a fast open sends a pressure spike through every zone simultaneously. Slow and steady protects your heads and lateral lines. Give the system time to fill before you move to the next step.
Run each zone manually for two to three minutes and watch every head. Look for heads that are not popping up fully, heads that are spraying in the wrong direction, and any areas where water is pooling instead of distributing evenly. Colorado's dry climate and alkaline soil cause nozzle buildup over winter. A clogged nozzle does not always look clogged until you run the zone and see an uneven pattern.
Check your controller settings before you set a schedule. Spring watering needs are not the same as July watering needs. A lot of Front Range homeowners set their timer in May and do not touch it again until August. By then they have been overwatering cool-season grasses during the cooler weeks and underwatering during peak heat. Adjust your schedule every few weeks as temperatures climb.
If you skipped the fall winterization or if your blowout was done improperly, expect to find damage. A head that did not fully drain over winter will often crack at the base. Manifold fittings are another common failure point after a hard winter.
Do not try to force a damaged zone to work by adjusting pressure. Shut it down and get it repaired before you run the rest of the system. One broken lateral line running undetected for a week costs more in water than a repair call would have.
Our sprinkler services cover full spring startups, system inspections, and repairs across Northern Colorado. We have been running irrigation systems in this region since 2004 and have seen what a Colorado winter does to a system that was not properly shut down or carefully restarted.
Call us at (303) 774-9449 or request a free quote.
