Introduction
This manual provides comprehensive instructions for the Geberit Sigma 80 242618SG1 Actuator Plate. This product is an original replacement part designed for use with Geberit concealed cisterns that utilize a two-flush system. The actuator plate features a sleek black glass surface, offering both functionality and a modern aesthetic to your bathroom.
Product Overview
The Geberit Sigma 80 actuator plate is a key component for operating a two-flush concealed cistern. It is characterized by its durable black glass construction and precise engineering, ensuring reliable performance.
Features:
- Original replacement part from the Geberit Sigma 80 series.
- Elegant black glass surface.
- Designed for two-flush operation.
Box Contents:
- 1 x Geberit Sigma 80 Actuator Plate (Model 242.618.SG.1)

Image: Front view of the Geberit Sigma 80 Actuator Plate. The plate features a sleek black glass finish with two distinct flush buttons, one larger for a full flush and one smaller for a reduced flush, positioned horizontally across the center.
Setup and Installation
The Geberit Sigma 80 actuator plate is designed for straightforward replacement. Proper installation ensures optimal functionality and longevity. Always ensure safety precautions are followed during installation.
Installation Steps:
- Preparation: Before beginning, ensure the water supply to the concealed cistern is turned off. This prevents accidental water release during the replacement process.
- Remove Old Plate: Carefully remove the existing actuator plate. This typically involves unlatching or unscrewing it from the cistern frame. Refer to the specific installation guide for your Geberit cistern model for precise removal instructions.
- Inspect Cistern Frame: Clean any dust or debris from the cistern frame where the actuator plate will be mounted. Ensure the flush rods or cables are accessible and in good condition.
- Align New Plate: Position the new Geberit Sigma 80 actuator plate (Model 242.618.SG.1) over the mounting points on the cistern frame. Ensure the flush rods or cables align correctly with the mechanisms on the back of the new plate.
- Secure Plate: Gently press the actuator plate into place until it clicks or is securely fastened. Some models may require tightening screws. Ensure the plate sits flush against the wall or tile surface.
- Restore Water Supply: Turn the water supply back on to the cistern.
- Test Functionality: Press both the small and large flush buttons to ensure they activate the flush mechanism correctly and return to their original position smoothly. Check for any leaks.

Image: Rear view of the Geberit Sigma 80 Actuator Plate. This image displays the internal structure, including the mounting clips and the mechanisms that connect to the cistern's flush rods or cables, essential for proper installation.
Operating Instructions
The Geberit Sigma 80 actuator plate provides a convenient and water-efficient two-flush system. Understanding its operation ensures optimal water usage.
Using the Two-Flush System:
- Reduced Flush: For liquid waste, press the smaller flush button. This activates a reduced volume flush, conserving water.
- Full Flush: For solid waste, press the larger flush button. This activates a full volume flush, ensuring effective waste removal.
- Ensure that the buttons return to their original position after each use to prevent continuous water flow into the toilet bowl.

Image: Close-up front view of the Geberit Sigma 80 Actuator Plate, clearly showing the distinct sizes of the two flush buttons. The smaller button is on the left, and the larger button is on the right, both integrated into the black glass surface.
Maintenance
Regular cleaning and proper care will help maintain the appearance and functionality of your Geberit Sigma 80 actuator plate.
Cleaning Instructions:
- Clean the black glass surface regularly with a soft, damp cloth.
- Use only mild, non-abrasive cleaning agents.
- Avoid using harsh chemicals, abrasive pads, scouring agents, or solvents, as these can scratch or damage the glass finish.
- Ensure that no water or cleaning solution enters the internal mechanisms of the actuator plate.
- Dry the surface with a clean, soft cloth to prevent water spots.
Troubleshooting
If you encounter issues with your Geberit Sigma 80 actuator plate, refer to the common problems and solutions below. For complex issues, professional assistance may be required.
Common Issues:
- Flush not activating:
Check if the buttons are pressing correctly and returning to their original position. Ensure there are no obstructions preventing the buttons from moving freely. If the issue persists, it may indicate a problem with the internal flush mechanism of the cistern, not the actuator plate itself. Consult a qualified plumber or the Geberit service manual for your specific cistern model. - Weak flush:
Verify that the water supply to the cistern is fully open. A weak flush is typically related to the cistern's internal components (e.g., fill valve, flush valve) or water pressure, rather than the actuator plate. Check for any blockages in the flush mechanism or outlet. Refer to your cistern's specific troubleshooting guide. - Continuous water flow into the toilet bowl:
This usually indicates an issue with the flush valve inside the cistern not sealing properly. The actuator plate itself is unlikely to be the direct cause. Turn off the water supply to the cistern and consult a plumber to inspect the flush valve.
Specifications
Detailed technical specifications for the Geberit Sigma 80 242618SG1 Actuator Plate.
| Manufacturer | GEBERIT |
| Part Number | 242.618.SG.1 |
| Item Weight | 1.62 pounds |
| Product Dimensions | 0.01 x 6.81 x 11.77 inches |
| Item Model Number | 242.618.SG.1 |
| Item Package Quantity | 1 |
| Batteries Required? | No |
Warranty and Support
For warranty information, technical assistance, or to purchase additional replacement parts, please refer to the official Geberit website or contact Geberit customer service directly. It is recommended to keep your purchase receipt as proof of purchase for any warranty claims.
Geberit Official Website: www.geberit.com





