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Leak detection · Greenwood, Indiana

Sprinkler Leak Detection & Repair in Greenwood, IN

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Technician checking a sprinkler valve box and buried irrigation line in a lawn

Short answer

Many Greenwood homes in newer subdivisions have in-ground sprinklers, and a cracked pipe or a valve that won’t close can waste thousands of gallons before anyone notices. We find out whether the leak is in the always-pressurized mainline or in one zone, trace that pipe, and pinpoint the break with acoustic listening, so the repair is one small hole in the lawn.

Common signs
Soggy spots, low pressure in a zone, water running with the system off, high summer bills
Where leaks hide
Mainline, zone valves, laterals, heads, backflow preventer
Indiana rule
Testable backflow devices must be tested every year (327 IAC 8-10)
Winter
Lines must be blown out before the first hard freeze

Mainline or zone? The first question

A sprinkler system has two kinds of pipe. The mainline runs from the house to the zone valves and stays under pressure all the time, so a mainline leak runs 24 hours a day and turns your water meter even when the system is off. Zone laterals only carry water when that zone is running, so a lateral leak shows up as a soggy patch or weak heads in one zone.

Telling the two apart takes a few minutes with the meter and the irrigation shutoff valve, and it decides where we search.

Quick checks you can do

  1. Meter with the system offTurn off all indoor water and leave the sprinklers off. If the meter moves, close the irrigation shutoff. If it stops, the mainline or a valve is leaking.
  2. Run each zoneRun zones one at a time and walk them. Weak heads, geysers or bubbling soil mark the problem zone.
  3. Check the valve boxWater standing in a valve box, or a zone that keeps running after it shuts off, points to a valve that isn’t sealing.
  4. Look at the backflow preventerDripping or spraying from the device near the house is a separate repair, and it often fails after a freeze.

More detail: how to find a leak in your sprinkler system.

Think you have a leak? Call and tell us what you’re noticing in your Greenwood home.

(877) 729-0265

Why sprinkler systems leak in Greenwood

  • Freeze damage when a system isn’t fully blown out before winter, especially to the backflow preventer and shallow pipe.
  • Mowers, aerators and landscaping that hit shallow lines and heads.
  • Clay soil movement that pulls fittings apart and cracks older PVC.
  • Tree roots wrapping or crushing laterals near mature trees.
  • Worn valve diaphragms that let a zone weep all day.

How we pinpoint a sprinkler leak

Isolate

Meter and valve tests separate mainline, valve and zone leaks, and separate the sprinkler system from the house.

Trace

The pipe route is located and marked, since sprinkler lines rarely run where the heads suggest.

Listen

On the pressurized mainline, a ground microphone pinpoints the hiss of the break.

Mark and repair

The leak is flagged in the lawn and repaired through one small hole, with the zone tested afterwards.

Indiana backflow testing and winterizing

A sprinkler system connected to your drinking water has a backflow preventer that keeps lawn water from being pulled back into the house. Indiana rules (327 IAC 8-10) require testable backflow devices to be tested every year by a state-certified tester, even if the system isn’t used. A failing device is also a common leak.

Before the first hard freeze, the system should be shut off, drained and blown out with compressed air. Water left in the backflow preventer and shallow lines is the most common cause of spring leaks in Greenwood yards.

Sprinkler leak or house water line?

A wet strip of lawn between the meter and the house can be a sprinkler mainline or your water service line. Closing the irrigation shutoff tells them apart: if the meter stops, it’s the sprinkler system; if it keeps moving with the house shutoff also closed, see water line leak detection in Greenwood.

Sprinkler Leak Detection & Repair: questions from Greenwood homeowners

How do I know if my sprinkler system is leaking?

With all water off and the sprinklers off, watch the meter. If it moves and stops when you close the irrigation shutoff, the sprinkler mainline or a valve is leaking. Soggy patches or weak heads in one zone point to a lateral leak in that zone.

Does Indiana require backflow testing for sprinklers?

Indiana rules (327 IAC 8-10) require testable backflow prevention devices to be tested annually by a state-certified tester. Check with your water utility for its reporting process.

Why is my sprinkler system leaking after winter?

Water left in the backflow preventer or shallow lines freezes and cracks them. Blowing out the system before the first hard freeze prevents most spring leaks.

Can a sprinkler leak raise my water bill even when the system is off?

Yes, if the leak is on the mainline or a valve, which stay under pressure all the time. Zone leaks only waste water while that zone runs.

Do you repair the sprinkler leak too?

Yes. Once the leak is marked, the broken pipe, fitting or valve is repaired through one small hole and the zone is tested afterwards.

Guides that go deeper

Sources: Indiana American Water; Town of Bargersville Water Utility; Indiana 811; Indiana Administrative Code, Title 327. Updated October 1, 2026.

Get the leak found in Greenwood

One call for detection and repair across Greenwood, ZIP 46142 and 46143.

(877) 729-0265
Contact Us: (877) 729-0265
Contact Us(877) 729-0265