1. Product Overview
The Camco Magnetic RV Bumper Cap with Lug Fitting is designed to secure your RV sewer hose within a 4-inch square bumper. It features high-strength neodymium magnets to keep the cap firmly in place and a bayonet-style lug fitting for easy connection and removal of your sewer hose. Small vent holes are integrated to provide airflow and act as an insect screen.
- Easy Sewer Hose Removal: Allows for secure pulling of the sewer hose from the RV bumper by the cap.
- Compatibility: Designed for most metal 4-inch square RV bumpers. The lugs are compatible with Camco bayonet-style sewer hose fittings.
- Magnetic Securement: Equipped with high-strength neodymium magnets for reliable attachment.
- Ventilation and Protection: Features small vent holes for airflow, which also serve as an insect screen.
- Quantity: This product is supplied as a 2-pack.
2. Setup Instructions
Follow these steps to properly install the Camco RV Magnetic Bumper Cap and connect your sewer hose.
2.1 Installing the Bumper Cap
- Prepare the Bumper: Ensure your RV's 4-inch square bumper opening is clean and free of debris.
- Insert the Cap: Align the magnetic bumper cap with the opening of your RV's square bumper.
- Secure the Cap: Push the cap firmly into the bumper opening until the magnets engage and hold it securely in place. The magnets are designed to provide a strong hold during travel.

Figure 2.1: A hand is shown inserting the black Camco Magnetic RV Bumper Cap, with its orange internal lug fitting, into the end of a silver RV bumper. This demonstrates the initial installation step.
2.2 Connecting the Sewer Hose
- Retrieve Hose: If your sewer hose is stored inside the bumper, pull it out slightly.
- Align Fitting: Take the bayonet-style fitting of your Camco sewer hose and align it with the lug fitting inside the bumper cap.
- Twist to Lock: Twist the sewer hose fitting onto the bumper cap's lugs until it locks securely. This connection allows the cap to pull the hose out when removed.

Figure 2.2: A black corrugated sewer hose with an orange bayonet fitting is shown being connected to the orange lug fitting of the black Camco Magnetic RV Bumper Cap. This illustrates how the sewer hose attaches to the cap for secure storage and retrieval.
3. Operating Instructions
The Camco Magnetic RV Bumper Cap simplifies the storage and retrieval of your RV sewer hose.
3.1 Removing the Sewer Hose
- Grasp the Cap: Firmly grasp the exterior of the magnetic bumper cap.
- Pull to Remove: Pull the cap straight out from the RV bumper. If the sewer hose is attached to the cap, it will be pulled out of the bumper along with the cap.
- Disconnect Hose: Once the desired length of hose is retrieved, twist and unlock the sewer hose fitting from the bumper cap.
3.2 Storing the Sewer Hose
- Connect Hose to Cap: Ensure your sewer hose bayonet fitting is securely locked onto the bumper cap's lug fitting.
- Insert into Bumper: Push the sewer hose and attached cap back into the RV bumper opening.
- Secure Cap: Ensure the cap is fully seated and the magnets have engaged to hold it in place.
4. Maintenance
Regular maintenance ensures optimal performance and longevity of your bumper cap.
- Cleaning: Periodically clean the bumper cap with mild soap and water to remove dirt and debris. Ensure the vent holes remain clear.
- Magnet Inspection: Check the neodymium magnets for any signs of damage or corrosion. Ensure they are firmly seated within the cap.
- Lug Fitting Inspection: Inspect the bayonet lug fitting for wear or damage. A damaged fitting may not securely hold the sewer hose.
- Vent Hole Check: Verify that the small vent holes are not obstructed, allowing for proper airflow and insect screening.


Figure 4.1: The left image shows the exterior of the black bumper cap with its vent holes and "MAG-CAP" branding. The right image displays the interior, highlighting the orange lug fitting and the four circular magnets embedded in the corners. These views are useful for maintenance checks.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cap does not stay securely in bumper. | Weak or damaged magnets; bumper opening is not standard 4-inch square; debris in bumper opening. |
|
| Sewer hose does not attach securely to the cap. | Damaged lug fitting on cap; incompatible sewer hose fitting; debris in fitting. |
|
| Difficulty pulling sewer hose out with the cap. | Hose is stuck or tangled inside the bumper; cap not securely attached to hose. |
|
6. Product Specifications
| Brand | Camco |
| Model Number | 40312 |
| Material | Plastic (Cap), Neodymium (Magnets) |
| Color | Black (Cap), Orange (Lug Fitting) |
| Compatibility | Most metal 4-inch square RV bumpers; Camco bayonet-style sewer hose fittings |
| Item Weight | 0.35 kg (per 2-pack) |
| Included Components | (2) Camco RV Magnetic Bumper Caps |
| UPC | 014717403122 |
7. Warranty Information
The Camco RV Magnetic Bumper Cap (Model 40312) comes with a Limited 1-Year Manufacturer Warranty. This warranty covers defects in materials and workmanship under normal use. For specific details regarding warranty claims and coverage, please refer to the official Camco website or contact Camco customer support.
8. Customer Support
For further assistance, technical support, or to inquire about replacement parts, please contact Camco customer service:
- Website: Visit the official Camco website for FAQs and support resources.
- Contact Information: Refer to the product packaging or the Camco website for current contact details (phone number, email).
When contacting support, please have your product model number (40312) and purchase information available.