Irrigation pipe beneath a sidewalk or walkway can fail just like pipe in open lawn, but hardscape makes diagnosis and access more important. The first wet spot you see is not always directly above the break.
Why water surfaces away from the damage
Water follows disturbed soil and the easiest path to the surface. A leak under concrete may travel several feet before it appears at an edge or joint.
Confirm the crossing is actually the problem
Compare pressure on the affected zone, look for water movement on both sides of the hardscape and consider where the lateral line should logically run. Diagnosing first can prevent unnecessary concrete work.
Repair options depend on the crossing
A short sidewalk may allow a new line or sleeve to be passed beneath it. Longer or heavily reinforced hardscape may make rerouting around the obstacle more practical.
Existing sleeves can help
Some installations include a sleeve beneath the sidewalk for irrigation pipe. Finding and reusing that path can make the repair far less disruptive.
Do not open concrete before the leak is located
Breaking pavement in the wrong spot adds restoration cost without fixing the irrigation problem. Pressure symptoms and line layout should guide the repair plan.
Related guides
See underground sprinkler leak signs, tree roots and irrigation lines, and our Grosse Pointe irrigation pipe repair service.
Water-efficiency resource
EPA WaterSense recommends inspecting irrigation systems for leaks and repairing problems before they waste water. EPA WaterSense home maintenance
