Rain Bird DASASVF100 Professional Grade Anti-Siphon Valve with Flow Control User Manual

Introduction

The Rain Bird DASASVF100 Professional Grade Anti-Siphon Valve with Flow Control is designed for above-ground irrigation systems. This 1-inch threaded female x female valve helps prevent backflow and allows for precise flow adjustment to optimize sprinkler performance and water conservation. It is compatible with any standard 24-volt AC irrigation timer/controller.

Image: The Rain Bird DASASVF100 Anti-Siphon Valve, showing its main components and 1-inch threading.

Setup and Installation

Proper installation is crucial for the effective operation and backflow prevention of your Rain Bird Anti-Siphon Valve. This valve is designed for above-ground installation only.

1. Placement: Install the valve at least 6 inches (15 cm) above the highest sprinkler head on the valve line. This ensures proper anti-siphon function and prevents backflow into your main water supply.
2. Avoid Downstream Valves: Never install another valve further down the line from the main anti-siphon valve.
3. Connection: The valve features 1-inch female pipe thread (FPT) inlet and outlet connections. Ensure secure and watertight connections to your irrigation piping.
4. Wiring: Connect the valve's solenoid to your 24-volt AC irrigation timer/controller. Use waterproof wire connectors for all electrical connections to protect against moisture and ensure long-term reliability.
5. Flushing: After installation and before initial startup, always flush the system of dirt and debris manually using the valve's external bleed screw. This prevents clogs and ensures smooth operation.

Image: Diagram illustrating the correct above-ground installation of the anti-siphon valve relative to the water source and landscape.

Image: Wiring diagram showing how to connect multiple valves to an irrigation controller, emphasizing common and zone wires.

Operating Instructions

The Rain Bird DASASVF100 valve offers both automatic and manual operation, along with flow control for precise watering.

• Automatic Operation: The valve operates automatically when connected to a 24-volt AC irrigation timer/controller. Program your controller for desired watering schedules.
• Manual Operation (Bleed Screw): For manual activation or flushing, turn the bleed screw counter-clockwise. Water will begin to flow through the zone. To stop flow, turn the bleed screw clockwise until it is hand-tight.
• Flow Control: The top-mounted, easy-turn flow control knob allows you to adjust the water flow to the zone. Turn the knob to increase or decrease flow, optimizing sprinkler performance to avoid misting and ensure uniform coverage.

Image: Diagram highlighting the solenoid, flow control knob, and bleed screw on the valve for operational adjustments.

Maintenance

Regular maintenance, particularly diaphragm replacement, can extend the life of your valve and ensure optimal performance. A Rain Bird diaphragm replacement kit (sold separately) typically includes a new diaphragm, screws, a spring, and a solenoid filter.

Replacing the Diaphragm

1. Shut Off Water: First, shut off the main water supply to your irrigation system to prevent water flow during maintenance.
2. Disconnect Wires: Disconnect the wires leading to the solenoid. You may cut them or unscrew the wire nuts.
3. Remove Solenoid: Turn the solenoid counter-clockwise to remove it from the valve body.
4. Remove Solenoid Filter: Use a narrow slotted screwdriver to carefully remove the solenoid filter from the solenoid. Insert the new solenoid filter from the kit.
5. Unscrew Bonnet: Unscrew the bonnet screws (typically 6) and carefully remove the bonnet (top cover) from the valve body.
6. Replace Diaphragm and Spring: Remove the old diaphragm and spring. Note that the diaphragm is designed to fit in only one orientation. Replace them with the new diaphragm and spring from the kit.
7. Reinstall Bonnet: Carefully reinstall the bonnet, ensuring the diaphragm is correctly seated. Hand-tighten the screws in a crisscross pattern to ensure even pressure.
8. Reinstall Solenoid: Reinstall the solenoid by rotating it clockwise until it is hand-tight. Do not over-tighten with tools, as this can damage the valve.
9. Reconnect Wires: Connect the white wire from the solenoid to the common wire (usually white) using a waterproof wire nut. Connect the other solenoid wire to the power wire (usually colored) for that zone.
10. Restore Water: Turn the irrigation water supply back on.

Image: Close-up view of a hand removing the diaphragm from the valve body during replacement.

Image: Diagram showing the counter-clockwise rotation to remove the solenoid from the valve.

Image: Diagram illustrating the correct placement of the new diaphragm and spring within the valve body.

Image: Diagram showing the location of the bonnet screws and how to remove the bonnet.

Image: Diagram showing the clockwise rotation to reinstall the solenoid onto the valve.

Video Guide: How To Replace Diaphragm

Video: A detailed guide from Rain Bird on how to troubleshoot and replace the diaphragm in a Rain Bird valve, including steps for disassembly, part replacement, and reassembly.

Troubleshooting

If you experience issues with your Rain Bird DASASVF100 valve, consider the following common problems and solutions:

• Continuous Water Leakage: If water is continuously leaking from a zone even when the valve is not activated by the controller, first try flushing the valve by turning the bleed screw counter-clockwise. If the leakage persists, it may indicate damage to the valve's diaphragm. Refer to the Maintenance section for instructions on replacing the diaphragm.
• No Water Flow: Ensure the main water supply to your irrigation system is turned on. Check the wiring connections to the solenoid and the irrigation controller for any disconnections or damage. Verify that the controller is programmed correctly and sending power to the specific zone.
• Low Flow/Misting: Adjust the flow control knob on top of the valve to increase water flow. Ensure that your system's water pressure is within the recommended operating range (15 to 150 psi). For flows below 3 GPM or drip applications, ensure a 200 mesh filter is installed before the valve.

Specifications

Warranty

The Rain Bird DASASVF100 Anti-Siphon Valve comes with a manufacturer's warranty. For detailed information regarding warranty terms, coverage, and claims, please refer to the official Rain Bird website or the documentation included with your product.

Support

For additional support, technical assistance, or to purchase replacement parts, please visit the official Rain Bird website or contact their customer service. You can find more information and resources at the Rain Bird Store on Amazon.