Spring sprinkler start-up in the Carson Valley, step by step
Irrigation 4 min read
Charging an irrigation system too fast is the most expensive five minutes of the year. Here's the order we do it in, and what to look for on the first run.
Every April we get the same call: “I turned the water on and now there’s a geyser in the front yard.”
Almost always it’s the same cause. The system sat empty and cold all winter, the main was opened all the way in one go, and the pressure spike blew a joint that was already cracked. It is entirely avoidable, and it takes about twenty extra minutes.
#Wait for the ground, not the calendar
The Carson Valley gets a warm week in March that fools everyone. Charging a system before the last hard freeze means any water left in a lateral can freeze again and split it.
We don’t start systems until night-time lows have stayed above freezing for about a week. In Gardnerville and Minden that’s usually mid-April. Up toward Reno it can be a little earlier; out in Genoa against the hill, a little later.
#Open the main slowly. Really slowly.
This is the step people skip, and it’s the one that matters.
- Open the last zone valve manually before you charge anything, so air has somewhere to escape.
- Crack the main open about a quarter turn. You should hear air moving, not water hammering.
- Wait. Two or three minutes. Let the system fill at a trickle.
- Open the main the rest of the way once the hissing has stopped and the line is full.
Water hammer — that bang you hear when a full-bore valve slams a column of water into a dead end — is what breaks fittings. Filling slowly means there’s never a solid column to slam.
#Then run every zone, one at a time
Stand at the zone while it runs. You’re looking for four things.
| What you see | What it means |
|---|---|
| Water bubbling up in the lawn | Cracked lateral or a broken riser below grade |
| A head that mists instead of streams | Pressure too high, or a worn nozzle |
| A head that barely dribbles | Clogged filter, or a leak upstream stealing pressure |
| A dry wedge between two heads | Head out of adjustment, or the wrong nozzle arc |
Write down the zone number for anything that looks wrong and move on. Don’t stop to fix things mid-inspection — you’ll lose track of which zones you’ve checked.
#Check the controller before you blame the system
Half the “broken sprinkler” calls we get in spring are a controller that lost its schedule when the power blipped over winter, or a backup battery that died in 2023.
- Confirm the current date and time — a controller running on the wrong day waters at the wrong time.
- Check every zone’s run time, not just zone one.
- Replace the backup battery if there is one.
- If you have a smart controller, confirm it reconnected to WiFi. They often don’t after a router change.
#Set the schedule for April, not July
The most common mistake we see is a system running its summer schedule in spring. In April the ground is still holding winter moisture and the days are short. Running July times in April drowns roots, wastes a lot of water, and encourages shallow rooting that will hurt the lawn in August.
Start at roughly half the summer run time, two or three days a week, and increase it as the weather turns. Deep and infrequent beats short and daily at every point in the season.
#What we’d rather you call us for
Charging the system yourself is completely reasonable. Call us if you find any of these, because they get worse and more expensive fast:
- Water surfacing anywhere in the lawn or beds
- A zone that won’t shut off when the controller says it should
- A valve that buzzes but doesn’t open
- Pressure that’s clearly dropped since last year across every zone
That last one usually means a leak on the main line, and every day it runs is money into the ground.
We cover irrigation repair across Gardnerville, Minden, Carson City and Reno — get in touch if the first run turns up something you’d rather not chase yourself.
- irrigation
- spring
- maintenance
- water
