Irrigation leak detection and repair in La Mirada

A drip irrigation system is designed to release water slowly at the root zone, which means a leak in it is also slow and easy to miss. A cracked poly tubing joint seeps into the soil rather than pooling on the surface. A clogged emitter forces extra pressure onto the rest of the zone and blows out a fitting. A solenoid valve that will not close fully lets a zone run between scheduled cycles, and the only sign is a water bill that will not come down. Finding the fault means isolating the zone and working the system while it runs.

Emitters and poly tubing

The ends of the system

At the delivery end of a drip zone, emitters rated at half a gallon or one gallon per hour puncture the poly tubing and drip at the base of each plant. When an emitter cracks or pulls out of the tubing, the water that was meant for a plant's root zone sprays sideways into the soil. The poly tubing itself is flexible enough to handle movement, but a fitting connection at a tee or an end cap can push off under pressure, especially if a previous repair was done with the wrong size barb. We check each emitter and each fitting connection on a running zone before looking further upstream.

Solenoid valves

The zone valve that will not close

Each irrigation zone is controlled by a solenoid valve in a buried valve box, usually near the main controller or at the property line. The solenoid is an electrical coil that opens a diaphragm inside the valve body when the controller signals a watering cycle. A diaphragm that has torn, a solenoid coil that has shorted, or debris on the valve seat keeps the zone running after it should have closed. A zone that runs continuously or comes on without a scheduled cycle points straight to the solenoid valve for that zone. We open the valve box, pull the solenoid, and inspect the diaphragm and seat.

Backflow preventer

The anti-siphon device on each zone

Most residential irrigation zones in La Mirada use an anti-siphon valve at the head of each zone, a combined zone valve and backflow device that sits several inches above the highest emitter on the zone. When the anti-siphon seal inside fails, water dribbles out the vent opening at the top of the device continuously. It is an obvious drip when the valve is accessible above grade, but in older installations where valves were buried, the same drip soaks into the soil out of sight. Replacing the anti-siphon insert or the whole valve head fixes it.

Detection and cost

Zone isolation and a meter check

We isolate the suspect zone, run it at the controller, and walk the lateral line and emitter heads while the system is live, watching for spray where there should be a slow drip, listening for a hissing fitting, and checking the valve box for a weeping solenoid or diaphragm. A meter check before and after a manual zone run confirms whether the zone is consuming more than its emitter ratings predict. La Mirada's warm climate keeps irrigation running most of the year, so a slow zone leak compounds into a real water expense over time. Most repairs are a new emitter, a barbed fitting, or a solenoid swap: contained costs. To describe what your system is doing, call (562) 488-9614.

Questions we hear

Answered for La Mirada homeowners