Orbit 57623 3/4" FPT 100 Series Anti-Siphon Automatic Sprinkler Valve with Flow Control Instruction Manual

Introduction

The Orbit 57623 3/4" FPT 100 Series Anti-Siphon Automatic Sprinkler Valve with Flow Control is designed to protect your irrigation system and culinary water supply from contamination due to backflow. This valve features an atmospheric vacuum breaker and is compatible with most 24 VAC irrigation controllers. Its durable plastic construction ensures reliable performance for outdoor irrigation applications with cold water only.

Figure 1: Orbit 57623 3/4" FPT 100 Series Anti-Siphon Automatic Sprinkler Valve.

Key Features:

• Backflow Prevention: Integrated atmospheric vacuum breaker prevents water contamination.
• Flow Control: Allows adjustment of water flow as needed.
• Easy Installation: Designed for above-ground installation on risers.
• Compatibility: Works with major brands of 24 VAC irrigation controllers.
• Internal Filter: Scrubber filter helps keep the system clog-free.
• Manual Operation: Features a manual on/off option and bleed screw for testing and flushing.

Setup and Installation

Proper installation is crucial for the optimal performance and safety of your irrigation system. This valve is designed for outdoor irrigation use with cold water only and must be installed above ground.

Installation Requirements:

• Install the anti-siphon valve at least 6 inches (15 cm) above the highest sprinkler head in the controlled zone.
• Ensure the valve is installed on risers for easy access and maintenance.
• Use appropriate threaded pipe adapters, PTFE thread seal tape, PVC primer, and PVC cement for secure connections.

Step-by-Step Installation:

1. Shut Off Water Supply: Before beginning any work, turn off the main water supply to your irrigation system.
2. Prepare Pipe Adapters: Wrap a thin layer of PTFE thread seal tape around the threads of your pipe adapters.
3. Attach Adapters to Valve: Screw the pipe adapters into the valve's inlet and outlet. Tighten them with pliers or channel locks, but be careful not to overtighten to prevent damage to the plastic.
4. Ensure Correct Flow Direction: Verify that the "FLOW" arrow on the valve body points in the direction of water flow.
5. Apply Primer and Glue: Apply PVC primer to the insides of the fittings and the outsides of the pipes. Once the primer dries, spread an even layer of PVC cement over the primed areas.
6. Connect Pipes: Insert the pipes into the fittings, ensuring the valve is level. Allow the glue to dry for at least 30 minutes before turning the main water supply back on.
7. Wire Solenoid: Connect the white wire from the solenoid to the common wire of your sprinkler timer (usually also white). Connect the other solenoid wire to a power wire (usually colored) from your timer. Use waterproof wire nuts to protect connections.

Operating Instructions

The Orbit 57623 valve offers both automatic and manual control options.

Automatic Operation:

Once properly wired to a 24 VAC irrigation controller, the valve will open and close automatically according to the schedule set on your controller. Ensure your controller is programmed correctly for desired watering times and zones.

Manual Operation:

• Manual On/Off Lever: The valve includes a manual on/off lever (often a small black tab or knob near the solenoid). Turning this lever will manually open or close the valve, overriding the controller.
• Bleed Screw: A bleed screw is provided for flushing the system or releasing air. To manually open the valve and flush, slowly turn the bleed screw counter-clockwise until water flows. To close, turn clockwise until snug.

Figure 2: Close-up view of the Orbit 57623 valve showing the flow control, 24 VAC solenoid, and manual on/off lever.

Flow Control Adjustment:

The integrated flow control allows you to adjust the amount of water flowing through the valve. Turn the flow control knob clockwise to decrease flow and counter-clockwise to increase flow. Adjust as needed for specific zone requirements.

Maintenance

Regular maintenance helps ensure the longevity and efficient operation of your Orbit anti-siphon valve.

Internal Scrubber Filter:

The valve is equipped with an internal scrubber filter to prevent clogs. Periodically inspect and clean this filter if you notice reduced flow or erratic operation. Refer to the troubleshooting section for steps on accessing internal components.

Figure 3: The internal scrubber filter helps maintain clog-free operation.

Diaphragm and Seal Replacement:

Over time, the diaphragm and seals may wear out, leading to leaks. Repair kits (such as Orbit 57078) are available to replace these components. Follow the instructions provided with the repair kit for proper replacement.

Troubleshooting

This section addresses common issues you might encounter with your Orbit anti-siphon valve.

Common Issues and Solutions:

• Valve Not Opening: Check wiring connections to the controller. Ensure the controller is sending a 24 VAC signal. Manually open the valve using the lever or bleed screw to confirm water pressure.
• Valve Not Closing / Constant Leak: Inspect the diaphragm for debris or damage. Ensure the lid screws are tightened evenly. Check the solenoid for proper seating and function.
• Reduced Flow: Clean the internal scrubber filter. Check for obstructions in the pipes or sprinkler heads. Ensure the flow control knob is fully open.
• Leakage from Anti-Siphon Lid: Check the seal within the anti-siphon lid for proper placement and damage. Ensure sufficient back pressure from downstream components.
• Leakage from Solenoid or Rotation Adapter: Inspect the O-ring on the solenoid for debris or damage. Re-tighten the solenoid.
• Leakage from Flow Control Stem: This typically indicates a worn lid subassembly, which may require replacement.
• Leakage from Inlet/Outlet Threads: Reapply PTFE pipe tape to the threads. Do not use pipe dope as it may be incompatible with valve materials.

Specifications

What's in the Box

• 1 x Orbit 57623 3/4" FPT 100 Series Anti-Siphon Automatic Sprinkler Valve with Flow Control

Warranty and Support

For warranty information, technical support, or to purchase replacement parts, please visit the official Orbit website or contact Orbit customer service. You can also find additional resources and products at the Orbit Store on Amazon.