Introduction
This manual provides essential information for the installation, operation, and maintenance of the GROHE Rapid SL Toilet System, Model 38996000. This cavity flushing system is engineered for installation inside or between walls, offering a space-saving solution without compromising performance. It is specifically designed for integration with GROHE toilet systems. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your product.
Product Overview
The GROHE Rapid SL Toilet System (Model 38996000) is a robust and efficient solution for modern bathroom installations. Its design prioritizes concealed installation, making it ideal for contemporary spaces where aesthetics and space optimization are key.

Image: The GROHE Rapid SL Toilet System, showcasing its blue steel frame, integrated white tank, and plumbing connections for wall-mounted toilet installation. This image illustrates the complete assembly designed for concealed installation within a wall.
Key Features:
- 1/2 inch water supply connection: Located conveniently on the top of the carrier for easy plumbing integration.
- Includes 2 fixing bolts: Essential hardware provided for secure toilet installation.
- Pneumatic discharge valve: Features a stop function for efficient and controlled flushing.
- Overall Width: Measures 24 5/8 inches, designed for compact wall integration.
- Maintenance accessibility: Designed for easy access through the front plate, simplifying future servicing.
Specifications
| Attribute | Detail |
|---|---|
| Manufacturer | GROHE |
| Part Number | 38996000 |
| Item Weight | 29.4 pounds |
| Product Dimensions | 44.69 x 25.39 x 5.91 inches |
| Item Model Number | 38996000 |
| Size | 1.89 x 24.60 x 44.48 inches |
| Color | GROHE NO FINISH |
| Finish | GROHE StarLight Chrome |
| Material | Steel, Chrome |
| Shape | Rectangular |
| Installation Method | Wall Mounted |
| Item Package Quantity | 1 |
| Water Consumption | 1.6 Gallons per Flush |
| Batteries Required? | No |
| Date First Available | May 11, 2013 |
Setup and Installation
The GROHE Rapid SL Toilet System is designed for concealed installation within a 2x4 wall structure. Due to the complexity and critical nature of plumbing and structural integration, professional installation by a qualified plumber or contractor is highly recommended.
General Installation Considerations:
- Ensure the wall structure can adequately support the system and a wall-hung toilet.
- Proper water supply and drainage connections are crucial. The system features a 1/2 inch water supply connection at the top.
- Accurate positioning of the fixing bolts for the toilet is essential for correct toilet alignment.
- Refer to the detailed installation diagrams and instructions provided with the physical product for precise measurements and steps. These are critical for a successful and leak-free installation.
- Verify all connections for leaks before sealing the wall.
Note: This manual provides general guidance. Always follow the specific, detailed installation instructions included in the product packaging for your safety and to ensure proper functionality and warranty compliance.
Operating Instructions
Once installed, the GROHE Rapid SL Toilet System operates in conjunction with your chosen wall-hung toilet and flush plate.
Flushing Operation:
- The system utilizes a pneumatic discharge valve. Pressing the flush plate activates this valve, releasing water from the tank.
- Many GROHE flush plates offer dual-flush functionality (full flush and half flush) for water conservation. Refer to your specific flush plate's instructions for details on its operation.
- The pneumatic discharge valve includes a stop feature, allowing for precise control over the flush volume if desired (depending on flush plate model).
Ensure the flush plate is correctly installed and aligned for optimal operation.
Maintenance
Regular maintenance ensures the long-term performance and hygiene of your GROHE Rapid SL Toilet System.
Accessing Internal Components:
- A key design feature of this system is that maintenance is accessible through the front plate (the flush plate opening). This allows for servicing of internal components without needing to open the wall.
- To access the internal tank components (e.g., fill valve, flush valve), carefully remove the flush plate according to its specific instructions.
Cleaning:
- For external surfaces (flush plate), use a soft cloth and mild, non-abrasive cleaning agents. Avoid harsh chemicals, abrasive cleaners, or scouring pads, as these can damage the finish.
- Periodically check for any visible leaks around connections.
Winterization (if applicable):
If the system is installed in an unheated area subject to freezing temperatures, ensure the water supply to the unit is shut off and the tank is drained to prevent damage from freezing. Consult a professional plumber for proper winterization procedures.
Troubleshooting
This section provides basic troubleshooting steps for common issues. For more complex problems, contact a qualified plumber or GROHE customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Toilet not flushing or weak flush |
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| Continuous water running into toilet bowl |
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| Visible leaks from system |
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Warranty and Support
GROHE products are manufactured to the highest standards and undergo rigorous quality checks. For specific warranty information regarding your GROHE Rapid SL Toilet System (Model 38996000), please refer to the warranty card included with your product packaging or visit the official GROHE website.
For technical assistance, spare parts, or service inquiries, please contact GROHE customer support:
- GROHE Official Website: www.grohe.us (or your regional GROHE website)
- Customer Service Contact: Refer to the "Contact Us" section on the GROHE website for phone numbers and email support.
When contacting support, please have your product model number (38996000) and date of purchase readily available.