1. Introduction
This manual provides essential information for the proper use, installation, and maintenance of the Truma AquaGo Electric Antifreeze Vent Plug. This product is a replacement part designed specifically for the Truma AquaGo Electric Antifreeze Kit. Please read this manual thoroughly before using the product to ensure safe and effective operation.
2. Safety Information
Always observe the following safety precautions:
- Ensure the Truma AquaGo system is powered off and cooled down before handling any components, including the vent plug.
- This plug is designed for specific Truma AquaGo models. Do not attempt to force it into incompatible systems.
- Keep out of reach of children.
- Do not modify the plug in any way. Use only as intended.
- If the plug appears damaged, do not use it. Replace it with a new, genuine Truma part.
3. Product Overview
The Truma AquaGo Electric Antifreeze Vent Plug is a crucial component for protecting your Truma AquaGo system's vent from external elements when not in use, particularly during periods of storage or when antifreeze procedures are being performed. It is designed to fit securely into the vent opening.

Figure 3.1: The Truma AquaGo Electric Antifreeze Vent Plug. This image shows the yellow plastic plug, designed to seal the vent opening of the Truma AquaGo system.

Figure 3.2: Truma AquaGo Electric Antifreeze Vent Plug as supplied in its original clear plastic packaging. The packaging includes part number 77000-00299 and indicates it is a "Plug" for "1 piece".
What's in the Box:
- 1 x Truma AquaGo Electric Antifreeze Vent Plug (Part Number: 77000-00300)
4. Setup and Installation
The vent plug is designed for simple, tool-free installation.
- Preparation: Ensure your Truma AquaGo system is completely shut down and cool. Locate the vent opening on the unit.
- Orientation: Observe the shape of the vent plug and the vent opening. The plug is designed to fit in one specific orientation. Identify the tab on the plug and align it with the corresponding slot or opening in the vent.
- Insertion: Gently insert the plug into the vent opening. Apply light, even pressure until the plug is seated firmly and securely. It should fit snugly to prevent debris or insects from entering. Do not force the plug if it does not fit easily; re-check the orientation.
- Verification: Once inserted, ensure the plug is flush with the vent surface and does not wobble.
Note: Some users have reported fitment issues with specific door frames. If the tab on the plug interferes with your unit's door frame, ensure you are inserting it correctly or consult Truma support if issues persist.
5. Operating Instructions
The Truma AquaGo Electric Antifreeze Vent Plug is a passive component. Its primary function is to seal the vent opening when the Truma AquaGo system is not in active use or during specific maintenance procedures like winterization.
- When to Use: Insert the vent plug when the Truma AquaGo system is stored, not in use for extended periods, or when performing antifreeze procedures to prevent foreign objects, insects, or debris from entering the vent.
- When to Remove: Always remove the vent plug before operating the Truma AquaGo system. Operating the system with the vent plug inserted can restrict airflow and potentially damage the unit.
6. Maintenance
The Truma AquaGo Electric Antifreeze Vent Plug requires minimal maintenance.
- Cleaning: Periodically inspect the plug for dirt, dust, or debris. Clean with a soft, damp cloth and mild soap if necessary. Rinse thoroughly and allow to air dry completely before re-inserting.
- Inspection: Before each use, inspect the plug for any signs of wear, cracks, or damage. If the plug is damaged, replace it immediately with a genuine Truma replacement part to ensure proper sealing and protection.
- Storage: When not in use, store the plug in a clean, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
Most issues related to the vent plug are minor and can be resolved easily.
| Problem | Possible Cause | Solution |
|---|---|---|
| Plug does not fit or is difficult to insert. | Incorrect orientation; debris in vent opening; incompatible model; tab interference with door frame. |
|
| Plug falls out easily or is loose. | Not fully seated; plug is damaged or worn; incorrect model. |
|
8. Specifications
| Attribute | Detail |
|---|---|
| Product Name | Truma AquaGo Electric Antifreeze Vent Plug |
| Model Number | 77000-00300 |
| Manufacturer Part Number | 7000-00300 |
| Brand | Truma |
| Item Weight | 0.176 ounces (approx. 5 grams) |
| Package Dimensions | 2 x 2 x 0.5 inches (approx. 5.08 x 5.08 x 1.27 cm) |
| Country of Origin | USA |
| Material | Durable plastic |
9. Warranty and Support
For warranty information and technical support regarding your Truma AquaGo Electric Antifreeze Vent Plug or the Truma AquaGo system, please contact Truma North America directly.
Truma North America Contact:
- Website: www.truma.com/us/en/
- Customer Service: Refer to the official Truma website for the most current contact information (phone numbers, email, or support forms).
Please have your product model number (77000-00300) and any relevant purchase details ready when contacting support.





