Introduction
This user manual provides detailed instructions for the installation, operation, and maintenance of your Eridanus Wall Hung Toilet System, Model ERI-WT421. This innovative toilet system is designed to maximize bathroom space, offer superior hygiene, and provide a quiet, efficient flushing experience. Please read this manual thoroughly before beginning installation or use to ensure proper function and longevity of your product.
What's in the Box
Your Eridanus Wall Hung Toilet System is shipped in two separate packages. Please ensure all components are present before proceeding with installation.
- Wall Hung Toilet Bowl
- Toilet Seat & Cover (Soft-Close)
- In-wall Toilet Tank Carrier System
- Dual-flush Plate
- Mounting Hardware

Image: All components included in the Eridanus Wall Hung Toilet System package.
Key Features
Space-Saving Design
The in-wall tank design conceals the toilet tank within the wall, freeing up valuable floor space and making your bathroom appear larger and less cluttered. This design can save up to 20% more floor space compared to traditional toilets.

Image: Space-saving benefit of wall-hung design.
Easy to Clean & Hygienic
The wall-hung design eliminates gaps for dirt accumulation and frees up floor space, making cleaning effortless. The rimless bowl design ensures a thorough and hygienic flush, preventing hidden areas for grime buildup.

Image: Enhanced cleanability due to wall-hung design.
Noise Reduction & Soft-Close Seat
The hidden in-wall tank and durable soft-closing seat contribute to a quieter bathroom environment. The soft-close seat gently closes without slamming, preventing noise and potential damage.

Image: Soft-close seat and noise reduction features.
Powerful Dual-Flush System
The forceful dual-hole flushing technology creates a swirling motion in the bowl for a quick, hushed, and thorough cleanup. It offers efficient 0.8/1.6 GPF dual flush options for water conservation.

Image: Powerful dual-flush system in action.
Adjustable Height
The in-wall carrier system allows for custom seat height adjustment, ensuring comfort for every family member.

Image: Adjustable height feature of the carrier system.
Setup and Installation
Installation of the Eridanus Wall Hung Toilet System requires careful attention to detail. It is recommended that installation be performed by a qualified professional.
In-Wall Tank Carrier System Installation
The robust stainless steel frame of the in-wall carrier system is designed to fit 2x4 wall stud construction and supports up to 880 lbs. It features a large capacity concealed water tank (2.2 GAL) and a brushed stainless steel actuator plate for long-lasting use.

Image: In-Wall Toilet Tank Carrier System details.
Toilet Bowl and Flush Plate Installation
Once the in-wall carrier system is securely installed within the wall, the toilet bowl is mounted to the wall using the provided mounting hardware. The dual-flush plate is then installed, providing access to the flushing mechanism.

Image: Installed Eridanus Wall Hung Toilet System.
Operating Instructions
The Eridanus Wall Hung Toilet System features a dual-flush mechanism for efficient water usage. The flush plate typically has two buttons or sections:
- Small Button/Section: Activates a partial flush (0.8 GPF) for liquid waste, conserving water.
- Large Button/Section: Activates a full flush (1.6 GPF) for solid waste, ensuring thorough cleaning.
Press the desired button firmly to activate the flush. The powerful gravity flush system will clear the bowl efficiently.
Maintenance
Regular cleaning and maintenance will ensure the longevity and hygienic performance of your Eridanus Wall Hung Toilet System.
Cleaning the Toilet Bowl and Seat
Use a mild, non-abrasive cleaner and a soft cloth or sponge to clean the ceramic bowl and polypropylene seat. Avoid harsh chemicals or abrasive tools that could damage the finish.
Quick-Release Seat for Easy Cleaning
The toilet seat features a quick-release mechanism for convenient removal, allowing for thorough cleaning of the bowl and seat hinges. Simply press the release buttons near the hinges and lift the seat off.

Image: Quick-release seat mechanism for easy cleaning.
In-Wall Tank Maintenance
Access to the in-wall tank for maintenance or repairs is typically done by removing the flush plate. Refer to the specific instructions provided with your in-wall tank carrier system for detailed maintenance procedures.
Troubleshooting
If you encounter any issues with your Eridanus Wall Hung Toilet System, please refer to the following common troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Weak Flush | Low water level in tank, partially closed water supply, clogged rim jets. | Check water supply valve, adjust water level in tank (refer to tank manual), clean rim jets. |
| Toilet Not Flushing | Issue with flush plate mechanism, float valve malfunction. | Ensure flush plate is correctly installed and engaging the mechanism. Inspect float valve for obstructions. |
| Continuous Running Water | Flapper or fill valve issue, debris in valve. | Inspect flapper for proper seal, check fill valve for debris or malfunction. |
| Leaking | Loose connections, damaged seals. | Tighten connections, inspect and replace any damaged seals. |
If the problem persists after attempting these solutions, please contact Eridanus customer support for assistance.
Specifications
- Model: ERI-WT421
- Color: White
- Material: Ceramic (Bowl), Polypropylene (PP) (Seat)
- Installation Type: Wall Mounted
- Tank Carrier Compatibility: Fits 2x4 Studs
- Maximum Weight Capacity (Carrier): 880 lbs
- Water Tank Capacity: 2.2 GAL
- Flush Type: Dual-Flush (0.8 GPF / 1.6 GPF)
- Included Components: Wall Hung Toilet Bowl, Mounting Hardware, Toilet Seat & Cover, In-wall Toilet Tank Carrier System, Dual-flush Plate, Installation Instruction

Image: Technical dimensions of the Eridanus Wall Hung Toilet Bowl.

Image: Technical dimensions of the Eridanus In-Wall Tank Carrier System.
Warranty and Support
Eridanus toilets come with lifetime after-sales service and a One-year limited warranty. The Soft-Closing toilet seat lid has a One-year limited warranty. Our customer support team is available to respond to messages within 24 hours.
- Lifetime After-Sales Service: Dedicated support for the lifespan of your product.
- One-Year Limited Warranty: Covers the toilet system.
- One-Year Limited Warranty: Specifically for the Soft-Closing toilet seat lid.
- 24-Hour Customer Assistance: Our team is ready to help with any inquiries.
For support, please visit the Eridanus Store on Amazon or contact us directly through the platform.





