Why Does My Sprinkler Zone Keep Running?

This time of year on Long Island, we receive several service calls from homeowners whose sprinkler zone keeps running and won’t shut off. The first instinct is usually to go to the controller and turn the dial to “Off,” but the zone continues running. The next step is often shutting off the main valve to the irrigation system, which unfortunately disables the entire system and results in a service call.

In most cases, the problem is caused by dirt or debris lodged inside the zone valve, preventing it from closing completely. In some situations, the debris may also damage the diaphragm inside the valve.

During the spring season, when irrigation systems are being activated and running on regular schedules, water demand increases significantly. This increased flow and turbulence in municipal water mains can stir up dirt and debris that eventually travels into your home’s water supply and connected irrigation system.

Over the years, we have found small rocks, screws, bolts, and even pieces of glass inside irrigation valves. Most debris passes through the system without causing problems, but occasionally an object becomes lodged in the valve, preventing it from shutting properly.

Repairing the issue typically requires:

• Locating and accessing the affected valve 
• Disassembling the valve 
• Flushing out debris 
• Replacing the diaphragm if damaged 
• Replacing the entire valve if it is old or worn out 

Once repairs are complete, the valve is tested multiple times from the controller to ensure proper operation.

We also recommend that every homeowner know the location of their irrigation system’s main shut-off valve in case an emergency shutdown is needed.

A beautiful landscape is a valuable investment, and maintaining the sprinkler system that supports it is far less expensive than replacing damaged lawn areas, shrubs, or trees.

To learn more, visit Rain Rich Irrigation & Landscape Lighting.
To schedule an appointment, call 631-423-2211.