1. Introduction
This manual provides instructions for the Allied Innovations Len Gordon Spa Air Button #4, Model 850401. This component is designed for use in spa and hot tub systems, functioning as an internal air button. It is specifically engineered to thread into an existing #4 body from the topside of your spa or hot tub.

Figure 1: Allied Innovations Len Gordon Spa Air Button #4 (Model 850401). This image shows the complete white air button, featuring its hexagonal top and threaded body, designed for internal spa control.
2. Installation
The Allied Innovations Len Gordon Spa Air Button #4 (Model 850401) is designed for straightforward installation. Ensure all power to the spa system is disconnected before beginning any installation or maintenance procedures.
- Identify the existing #4 body: Locate the designated opening on the topside of your spa or hot tub where the air button is to be installed or replaced.
- Prepare the opening: Ensure the existing #4 body is clean and free of debris. If replacing an old button, carefully remove the old component.
- Thread the new air button: Align the threaded portion of the Model 850401 air button with the existing #4 body. Carefully thread the button into place from the topside.
- Hand-tighten: Tighten the air button by hand until it is snug. Do not overtighten, as this can damage the threads or the button itself.
- Connect air tubing (if applicable): If your system requires it, ensure the air tubing from the air button is securely connected to the air switch mechanism.
Video 1: Spa/Hot Tub Air Button Overview. This short video demonstrates the physical characteristics and handling of a spa air button, providing a visual aid for understanding the component prior to installation.
3. Operation
The Len Gordon Spa Air Button #4 operates pneumatically to control various spa functions, such as jets or lights, when connected to a compatible air switch. To operate:
- Activation: Press the top of the air button firmly. This action sends a pulse of air through the connected tubing to the air switch, activating the corresponding spa function.
- Deactivation: Press the air button again to send another air pulse, which will typically deactivate the function.
The specific function controlled by the button depends on how your spa system is wired and configured.
4. Maintenance
Regular maintenance ensures the longevity and proper function of your spa air button. Always disconnect power to the spa before performing any maintenance.
- Cleaning: Periodically wipe the visible surface of the air button with a soft, damp cloth. Use mild, non-abrasive cleaners if necessary. Avoid harsh chemicals that could damage the plastic.
- Inspection: Check the button for any signs of wear, cracks, or damage. Ensure it depresses and returns smoothly.
- Air Tubing: Inspect the air tubing connected to the button for kinks, cracks, or disconnections. A compromised air tube can prevent the button from functioning correctly.
5. Troubleshooting
If your Allied Innovations Len Gordon Spa Air Button #4 is not functioning as expected, consider the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Button does not activate spa function. |
|
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| Button feels loose or wobbly. |
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If troubleshooting steps do not resolve the issue, consult a qualified spa technician.
6. Specifications
Key specifications for the Allied Innovations Len Gordon Spa Air Button #4 (Model 850401):
- Model: 850401
- Brand: Allied Innovations
- Type: Spa Air Button, Internal Only
- Color: White
- Material: Metal
- Compatibility: Threads into any existing #4 Body from topside.
- Item Dimensions (LxWxH): 2.85 x 1.35 x 1.25 inches
- Item Package Dimensions (LxWxH): 5.08 x 2.44 x 0.75 inches
- Package Weight: 0.02 Kilograms
7. Support and Warranty
For further assistance, technical support, or warranty information regarding your Allied Innovations Len Gordon Spa Air Button #4 (Model 850401), please refer to the manufacturer's official website or contact their customer service department. Specific warranty details are typically provided with the product packaging or on the manufacturer's official resources.





