NDS 111C
NDS 111C 10" Irrigation Control Valve User Manual
Brand: NDS | Model: 111C
1. Introduction and Overview
The NDS 111C 10" Irrigation Control Valve is designed for efficient management of water flow in irrigation systems. This round, green valve is engineered for ease of installation and reliable operation, ensuring precise control over your watering zones.
Key features include:
- Measures 10 inches in diameter.
- Features a round, compact shape.
- Constructed from durable green plastic.

2. Setup and Installation
Proper installation is crucial for the optimal performance of your NDS 111C Irrigation Control Valve. This valve is designed to be integrated into an existing irrigation system to regulate water flow to specific zones.
- Site Selection: Choose a location that is easily accessible for maintenance and protected from potential damage. Ensure the valve is installed at a point where it can effectively control the desired irrigation zone.
- Excavation: Dig a trench or hole large enough to accommodate the valve and its connections, allowing sufficient space for plumbing work.
- Connection: The valve features a flange inlet connection and threaded or boltable outlet connection. Connect the valve to your main water line and the irrigation zone piping using appropriate fittings and sealants to ensure a watertight seal. Refer to local plumbing codes for specific requirements.
- Orientation: Ensure the valve is oriented correctly according to the water flow direction, if indicated on the valve body.
- Testing: Before backfilling, slowly turn on the water supply to check for any leaks at the connections. Address any leaks immediately.
- Securing: Once connections are secure and leak-free, carefully backfill the area around the valve, ensuring it is stable and protected.

3. Operating Instructions
The NDS 111C Irrigation Control Valve is designed to be an integral part of an automated irrigation system. It functions as a gate for water flow, opening and closing to allow or restrict water to specific irrigation zones.
- Automated Control: This valve is typically controlled by an irrigation timer or controller. The controller sends an electrical signal to the valve's solenoid (if equipped, or to an external actuator) to open or close the valve.
- Manual Override (if applicable): Some control valves may feature a manual override mechanism, allowing you to open or close the valve without the controller. Consult your specific system's documentation for details on manual operation.
- Water Flow: When the valve is open, water flows through it to the designated irrigation zone. When closed, water flow is stopped.
Ensure your irrigation controller is programmed correctly to manage the watering schedule for each zone connected to an NDS 111C valve.
4. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your NDS 111C Irrigation Control Valve.
- Periodic Inspection: Periodically inspect the valve and its connections for any signs of leaks, cracks, or damage. Address any issues promptly to prevent water waste and system failure.
- Debris Removal: If the valve is accessible, occasionally check for and remove any debris (e.g., dirt, sand, small stones) that might accumulate around or inside the valve, which could impede its operation.
- Winterization (in cold climates): In regions subject to freezing temperatures, it is essential to properly winterize your irrigation system, including the control valves. This typically involves draining all water from the system to prevent freezing and potential damage to the valve and pipes. Consult a professional if unsure about winterization procedures.
- Cleaning: Clean the exterior of the valve as needed to remove dirt and grime, which can help in identifying potential issues.

5. Troubleshooting
If you encounter issues with your NDS 111C Irrigation Control Valve, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Water Flow |
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| Continuous Water Flow (Valve Won't Close) |
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| Leaks Around Valve Connections |
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If problems persist after attempting these solutions, it is recommended to consult a qualified irrigation professional.
6. Specifications
Detailed specifications for the NDS 111C 10" Irrigation Control Valve:
| Model Number | 111C |
| Brand | NDS |
| Material | Plastic |
| Color | Green |
| Item Dimensions (L x W x H) | 9.63 x 9.63 x 1.25 inches |
| Item Weight | 12.3 ounces |
| Exterior Finish | [AS] Green |
| Inlet Connection Size | 10 Inches |
| Inlet Connection Type | Flange |
| Outlet Connection Type | Threaded or Boltable |
| Outlet Connection Size | 10 Inches |
| Number of Ports | 2 |
| Valve Type | Irrigation Control Valve |
| Specification Met | ANSI B16.11, ASME B16.34, CSA, NSF, ULC, UPC |
| UPC | 052063011110 |
| Date First Available | January 18, 2007 |
7. Warranty and Support
For information regarding product warranty, technical support, or replacement parts for your NDS 111C Irrigation Control Valve, please refer to the official NDS website or contact NDS customer service directly.
You can also visit the official NDS store on Amazon for additional product information and support resources:
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