Irrigation System Repair in Southern California: Complete Guide

An efficient irrigation system is the backbone of a healthy Southern California landscape. When it fails, you get dry spots, dying plants, and a sky-high water bill — often all at once. This guide covers the most common irrigation problems and how they're repaired.

The most common irrigation problems

• Broken or clogged sprinkler heads: the number-one cause of dry spots and wasted water.
• Leaking valves: water that won't fully shut off, draining money underground.
• Low or uneven pressure: heads that barely spray or mist instead of throw.
• Controller and wiring faults: zones that won't turn on or won't shut off.
• Line leaks: soggy spots, sinkholes, or a spinning water meter.

Diagnose before you dig

Good repair starts with diagnosis. Run each zone and watch carefully: note heads that don't pop up, areas that stay dry or flood, misting (high pressure) or weak spray (low pressure or a leak), and any zone that fails to activate. The symptoms point to the cause.

Repair vs. upgrade

Sometimes a simple part swap fixes the issue; other times an aging system is worth upgrading — converting spray to drip, adding a smart controller, or re-zoning for efficiency. Upgrades cut water use and prevent repeat failures.

When to call a pro

Many homeowners can replace a head or clean a nozzle, but valve, wiring, mainline, and pressure problems are best handled by a professional. Our irrigation specialists diagnose and repair systems across the Inland Empire.

Frequently asked questions

How do I know if my sprinkler system has a leak?

Watch for soggy areas, a spinning water meter when everything is off, an unexplained bill spike, or low pressure at the heads.

Is it worth repairing an old irrigation system?

Often yes, but heavily worn systems may be more economical to upgrade — especially converting to drip and a smart controller to save water.

Arbol Roble has cared for Inland Empire landscapes since 1997, serving Rancho Cucamonga, Ontario, Fontana, Eastvale, Corona and Riverside. Request a free quote or browse our residential and commercial services.