Symptoms, Head by Head
Sprinkler faults localize beautifully once a zone runs. A head that geysers has lost its nozzle or snapped its riser, usually to a mower or a snow shovel. A head that barely mists while its neighbors throw full pattern is clogged or feeding a lateral split downstream. A head that never pops has pressure loss upstream or a stuck riser. A corner of turf that drowns while the rest runs right marks a lateral leak between heads, feeding the soil instead of the nozzles. And a head that dribbles for hours after the zone closes is either low-head drainage, water draining downhill through the lowest head, or a valve refusing to seat. Each symptom names its own repair.
The Zone Walk
Our sprinkler visits run the system as a demonstration. Each zone fires in turn while we walk it. We count heads against expected coverage, read pressure at the first and last head, flag risers, mark soggy ground between heads, and listen where a lateral is suspected. The controller's runtimes and history join the evidence, since a zone that needs double its old runtime to keep grass alive has been losing its water somewhere for a while. Most systems yield a complete fault list in under an hour, priced item by item. Owners are welcome to walk it with us, because watching a zone perform its own diagnosis beats any written report.
Laterals: The Leak Between the Heads
Lateral lines, the shallow zone-side pipes linking head to head, live eight to eighteen inches down, which is deep enough to hide and shallow enough to freeze. They split at winter's leftover water, crack under vehicle and equipment traffic, and part at fittings as expansive clay flexes them. The symptom is a zone-wide pressure sag plus one suspiciously wet stretch. Location is straightforward on a running zone with ground listening, and the repair is a small excavation and a coupling done with proper primer-and-cement patience. Chronic freeze-split laterals get the schedule fix, an earlier blowout, more often than they get better pipe.
Heads, Risers, and the Cheap Fixes
Most sprinkler repairs are pleasantly minor. Nozzles get replaced and matched to the zone's precipitation rate rather than whatever was in the truck. Broken risers get swapped, and high-traffic heads get flexible swing risers that survive the next mower pass. Low-head drainage gets check-valve heads at the zone's low points, which ends the overnight dribble and the moss it feeds. Tilted and sunken heads get raised and squared so coverage stops overwatering one arc to reach another. None of this is glamorous, and all of it shows up on the water bill and the turf within weeks. System-level faults uncovered during the walk, valve, main, and backflow issues, continue under the irrigation scope, and mystery wet zones that persist with the system isolated route to the broader yard diagnosis.
Chinook Country Watering
Boulder's winds add a local footnote: the downslope Chinooks that dry the Front Range also expose sprinkler faults, because marginal coverage that survives calm weeks browns fast when the wind steals its overspray. If turf stress maps to the windward edges of zones, the fix is often nozzle and spacing work rather than more runtime, which saves water instead of spending it. Lawns around Martin Acres and across the city can get the zone walk, the fault list, and the fixes in one visit through (303) 552-3896.
Renters and HOA residents, the walk works for you too. Documenting which zones misbehave, with a phone video of each fault performing, is exactly the evidence that gets a landlord or a board to authorize the repair without a second meeting.
Before calling, one free data point helps: note which zones concern you and run each for two minutes. What you observe in that walk is the visit's head start.