1. Product Overview
This manual provides instructions for the installation, operation, and maintenance of the Thetford SC234 SC200 Toilet Holding Tank Blade. This component is designed as a replacement part for compatible Thetford cassette toilets, specifically the C200 series, ensuring proper sealing and functionality of the waste holding tank.
2. Installation (Setup)
Proper installation of the holding tank blade is crucial for preventing leaks and ensuring efficient toilet operation. This blade is compatible with Thetford C200 series cassette toilets.
2.1. Required Tools
- Screwdriver (appropriate type for toilet fasteners)
- Gloves
- Cleaning supplies (mild detergent, water, cloth)
2.2. Installation Steps
- Preparation: Ensure the toilet cassette is empty and thoroughly cleaned. Disconnect any water supply if necessary.
- Access: Depending on your specific C200 model, you may need to remove the toilet bowl or access the cassette from the service door. Refer to your toilet's primary manual for specific access procedures.
- Remove Old Blade: Carefully locate and remove the fasteners securing the old blade mechanism. Note the orientation of the old blade for correct installation of the new one.
- Clean Area: Clean any residue or debris from the blade housing area to ensure a proper seal with the new blade.
- Install New Blade: Position the new Thetford SC234 SC200 blade (Part No. 23847) into the housing, ensuring it aligns correctly with the operating mechanism.
- Secure Blade: Re-install any fasteners removed in step 3, ensuring they are tightened securely but not overtightened.
- Test Functionality: Before reassembling the toilet, manually operate the blade to ensure smooth movement and a complete seal when closed.
- Reassemble: Reassemble the toilet components and reconnect any water supply.

Image 1: Thetford SC234 SC200 Toilet Holding Tank Blade. This image displays two views of the blade. The top view shows the smooth, oval surface. The bottom view reveals the central spindle and structural supports, indicating how it connects and operates within the toilet mechanism.
3. Operation
The holding tank blade functions as a seal between the toilet bowl and the waste holding tank. When the toilet is flushed, the blade opens to allow waste to pass into the tank and then closes to create an airtight and watertight seal, preventing odors and leaks. Ensure the blade operates smoothly and closes completely after each use.
4. Maintenance
Regular maintenance extends the life of your toilet blade and ensures optimal performance.
- Cleaning: Periodically clean the blade and its sealing surfaces with a mild, non-abrasive toilet cleaner. Avoid harsh chemicals that can damage rubber seals.
- Lubrication: Apply a silicone-based lubricant specifically designed for toilet seals to the blade's moving parts and seals every few months or as needed. This helps maintain smooth operation and prevents drying out of seals.
- Inspection: Regularly inspect the blade for signs of wear, cracks, or damage. A worn blade can lead to leaks and odors.
- Winterization: If winterizing your RV or motorhome, ensure the toilet system, including the blade, is properly drained and protected from freezing temperatures according to your vehicle's manual.
5. Troubleshooting
Address common issues related to the holding tank blade with these troubleshooting tips.
- Blade Not Sealing Completely:
- Check for debris caught under the blade. Clean thoroughly.
- Inspect the blade and its seal for wear or damage. Replace if necessary.
- Ensure the operating mechanism is not obstructed.
- Difficulty Operating Blade:
- Apply silicone-based lubricant to the blade and seals.
- Check for any mechanical obstructions or misalignments.
- Unpleasant Odors:
- Ensure the blade is sealing completely when closed.
- Clean the blade and surrounding area thoroughly.
- Verify proper ventilation of the holding tank.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Thetford |
| Model Name | SC234 SC200 Toilet Holding Tank Blade |
| Item Model Number | 23847 |
| Manufacturer Part Number | 301/397 |
| Compatibility | Thetford C200 series cassette toilets |
| Material | Plastic |
| Item Weight | 0.05 Kilograms (approx. 1.76 ounces) |
| Product Dimensions | 6.18 x 4.65 x 0.24 inches |
| Package Dimensions | 16 x 12 x 3.6 cm |
7. Warranty Information
Specific warranty details for the Thetford SC234 SC200 Toilet Holding Tank Blade should be obtained directly from the manufacturer, Thetford, or from your point of purchase. Please retain your proof of purchase for any warranty claims.
8. Support
For further assistance, technical support, or inquiries regarding your Thetford product, please contact Thetford customer service. You can typically find contact information on the official Thetford website or through your product retailer.
Visit the official Thetford website for more information: www.thetford.com





