How To Turn Off A Pop Up Sprinkler Head

Understanding Pop-Up Sprinkler Heads

Pop-up sprinkler heads are crucial components of automated irrigation systems, delivering water to lawns and gardens. Understanding their basic operation is essential before attempting any adjustments or shutdowns.

These heads typically retract into the ground when not in use, protected from damage. They extend upwards under water pressure during scheduled watering cycles.

Different types of sprinkler heads exist, including spray heads (fixed pattern), rotor heads (rotating stream), and impact heads (oscillating stream). Each type may have slightly different adjustment mechanisms.

Locating the Sprinkler Control Valve

Before working on any sprinkler head, locate and shut off the corresponding control valve. This valve regulates the water flow to that specific zone in your irrigation system.

Control valves are usually grouped together in a valve box, often located near the water meter or backflow preventer. The valve box is generally a green plastic container buried partially in the ground.

Identify the correct valve for the zone containing the sprinkler head you wish to disable. Zone numbers are often marked on the valve or the valve box itself. If unsure, test each valve by turning it off and observing which sprinkler heads stop operating.

Turn the valve handle clockwise to shut off the water flow. Ensure the water pressure is completely off before proceeding.

Disabling a Single Sprinkler Head: Manual Method

Using a Nozzle Plug

A nozzle plug is a small, removable piece that blocks the water flow through the sprinkler nozzle. This is a common and effective way to temporarily disable a single sprinkler head.

Carefully unscrew the existing nozzle assembly. Some nozzles require a specialized key or tool for removal, while others can be unscrewed by hand.

Insert the nozzle plug into the nozzle opening. Ensure it fits snugly and completely blocks the opening.

Reinstall the nozzle assembly (if applicable) or secure the plug in place. Test the sprinkler zone to confirm that water no longer flows from the disabled head.

Capping the Sprinkler Head

Capping involves physically sealing the sprinkler head to prevent any water from escaping. This method is often used for more permanent shutdowns or when a nozzle plug is unavailable.

Carefully unscrew the entire sprinkler head from the riser (the threaded pipe that connects the head to the underground pipe). A pipe wrench may be necessary if the head is tightly secured.

Clean the threads of the riser pipe to ensure a secure seal.

Apply Teflon tape (plumber's tape) to the riser threads, wrapping it clockwise several times. This creates a watertight barrier.

Screw a threaded cap onto the riser pipe. Tighten it securely with a wrench to prevent leaks. Ensure the cap is made of a material compatible with the existing irrigation system components (e.g., PVC or metal).

Adjusting the Flow Control (if equipped)

Some pop-up sprinkler heads have a flow control adjustment, usually a screw or dial located on the top or side of the head. This allows you to reduce or completely shut off the water flow to that individual head.

Locate the flow control adjustment on the sprinkler head. Refer to the manufacturer's instructions if needed.

Turn the adjustment screw or dial counterclockwise to reduce the water flow. Continue turning until the water flow is completely stopped.

Monitor the sprinkler head during a watering cycle to ensure that no water is escaping. Note that some flow control adjustments may not completely shut off the water flow, but only reduce it significantly.

Disabling a Zone: Using the Control Valve

Completely disabling a zone involves shutting off the water supply to all sprinkler heads within that zone. This is typically done at the control valve.

Locate the control valve for the zone you want to disable. As described previously, these valves are usually grouped together in a valve box.

Turn the valve handle clockwise to shut off the water flow to that zone. Ensure the valve is fully closed to prevent any leaks.

Mark the disabled valve or zone to prevent accidental activation. This can be done with a tag or label indicating that the zone is inactive.

Long-Term Deactivation Considerations

If a sprinkler head or zone is being deactivated for an extended period, consider additional steps to protect the system.

For capped sprinkler heads, periodically inspect the cap for cracks or leaks. Replace the cap as needed to maintain a watertight seal.

If a zone is permanently disabled, consider disconnecting the riser pipe from the main irrigation line and capping the main line connection. This prevents any potential future leaks.

When reactivating a previously disabled sprinkler head or zone, carefully inspect all components for damage or wear. Replace any damaged parts before resuming operation.

Troubleshooting Common Issues

Water Leaks: If water continues to leak from a disabled sprinkler head or zone, double-check the valve position and the integrity of any caps or plugs. Replace worn or damaged components.

Difficult Valve Operation: If a control valve is difficult to turn, it may be corroded or damaged. Lubricate the valve stem with a silicone-based lubricant or replace the valve if necessary.

Incorrect Zone Identification: If you are unsure which valve controls a specific zone, systematically test each valve and map the sprinkler heads to their corresponding zones.

Safety Precautions

Always wear appropriate personal protective equipment (PPE) when working on irrigation systems, including gloves and eye protection.

Turn off the main water supply before performing any major repairs or modifications to the system.

Be aware of underground utilities when digging near sprinkler heads or control valves. Call 811 (in the US) to have utilities marked before digging.

Consult a qualified irrigation professional if you are unsure about any aspect of disabling or repairing your sprinkler system.

Key Takeaways

Identify the Correct Valve: Accurately locate the valve controlling the specific sprinkler head or zone you want to disable.

Shut Off the Water Supply: Always turn off the water supply before working on any sprinkler components.

Choose the Appropriate Method: Select the most suitable method for disabling the sprinkler head, such as using a nozzle plug, capping the head, or adjusting the flow control.

Inspect for Leaks: After disabling the sprinkler head, thoroughly inspect for any leaks and address them promptly.

Consider Long-Term Deactivation: If disabling a sprinkler head or zone for an extended period, take additional steps to protect the system from damage and prevent future leaks.