Dead Spot in the Lawn? Check the Sprinkler Head First
If you have one dry or brown spot in the yard, start by checking the closest sprinkler head. A lot of times the head is clogged, tilted, buried too low, or not rotating correctly. In Idaho the clay-heavy soil common across Nampa, Caldwell and Kuna can shift and settle over time, which gradually buries heads below grade. Grass can also grow over the top of the head and block the spray pattern completely.
A quick thing to look for is whether the head is spraying evenly and reaching the area it is supposed to cover. If the head barely pops up, sprays sideways, or looks weak compared to the others, it may need to be cleaned, adjusted, raised, or replaced. This is one of the most common calls we get across the Treasure Valley, especially on systems that have been in the ground for 10 or more years.
Book a Sprinkler Repair Full GuideValve Box Full of Water? It Could Be a Bad Diaphragm
If your sprinkler valve box is full of water, one common cause is a leaking valve diaphragm. The diaphragm is the rubber part inside the valve that opens and closes when the system turns on and off. In the Treasure Valley where systems run hard all summer and then sit through an Idaho winter, diaphragms wear out faster than most homeowners expect.
When that diaphragm wears out, tears, or gets debris stuck in it, the valve may leak constantly. You might notice water sitting in the valve box, a zone that will not fully shut off, or a slow trickle from sprinkler heads even when the system is off. Left alone this wastes water, drives up your utility bill, and can eventually cause the valve to fail completely. We replace diaphragms and valves all across Nampa, Meridian, Boise and Caldwell every season.
Book a Sprinkler Repair Full GuideBig Wet Spot in the Yard? Look for a Broken Line
A large wet or muddy spot in the lawn can be a sign of a broken sprinkler line underground. This is especially common if the wet area shows up when the sprinklers run, or if one zone suddenly has very low pressure. In Idaho the freeze-thaw cycles every winter put stress on irrigation lines, particularly on systems installed in the late 1990s and early 2000s that are now reaching the end of their service life.
Trees are a big thing to watch for. Roots can grow around sprinkler lines and eventually crack, crush, or pull them apart. In areas like Boise's North End, Eagle and the older neighborhoods in Nampa near Lake Lowell where mature trees are common, root intrusion is one of the more frequent causes of broken lines we see. If the wet spot is near a tree, large shrub, driveway, or fence line, there is a good chance something underground has been damaged.
Book a Sprinkler Repair Full GuideLow Pressure on One Zone? Check for Leaks or Too Many Heads
If one sprinkler zone has weak pressure but the rest of the system works fine, the issue is usually inside that specific zone. It could be a broken line, a cracked fitting, a bad valve, clogged heads, or too many sprinkler heads running on one zone. This last one is common on new construction homes across Meridian, Caldwell and Star where systems sometimes have zones that are overloaded from the start.
A good way to spot this is to turn the zone on and walk the yard. Look for bubbling water, sunken wet areas, misting heads, or heads that barely pop up. One small underground leak can make the whole zone look weak. If the pressure issue started suddenly rather than gradually, a broken line is usually the cause. If it has always been a little weak, the zone may just have too many heads on it.
Book a Sprinkler Repair Full GuideSprinklers Running but Not Covering Right? Adjust the Spray Pattern
Sometimes the system is working, but the heads are not aimed correctly. A sprinkler head may be spraying the sidewalk, driveway, fence, house, or the same area as another head while missing dry parts of the lawn. This is especially common after a hard Treasure Valley winter where ground movement, frost heave, or mower hits have knocked heads out of position without anything obviously breaking.
This can waste a lot of water and still leave brown spots. Most spray heads and rotor heads can be adjusted so they hit the right area. If your lawn has dry patches and wet patches at the same time, the issue may not be water pressure, it may just be bad coverage. Idaho's low average rainfall means every zone needs to be dialed in correctly or parts of your lawn simply will not get enough water to survive the summer. A spring turn-on inspection catches most of these issues before they turn into dead spots in July.
Book a Spring Turn-On Full Guide