1. Product Overview
The Geberit Sigma30 Actuator Plate is designed for flush triggering in Geberit Sigma cisterns, specifically for stop-and-go flush systems. This model features a white matt coated, easy-to-clean surface with bright chrome-plated accents, ensuring both functionality and aesthetic appeal. The push bars are soundproofed and can be adjusted without the need for special tools, simplifying installation and maintenance.

Image showing the Geberit Sigma30 actuator plate in white matt coated finish, designed for stop-and-go flush systems.
2. Box Contents
Please verify that all components listed below are present in the packaging before beginning installation:
- Mounting frame
- 2 Spacer bolts
- Push rod
- Interruption lever
- Set of screws
3. Setup and Installation
This section provides general guidelines for installing the Geberit Sigma30 Actuator Plate. For detailed instructions specific to your cistern model, please refer to the cistern's installation manual or consult a qualified professional.
- Prepare the Cistern: Ensure the cistern is correctly installed and accessible. The flush mechanism should be ready to receive the actuator plate components.
- Install Mounting Frame: Position the mounting frame onto the cistern opening. Secure it using the provided set of screws. Ensure it is level and firmly attached.
- Insert Spacer Bolts: Insert the two spacer bolts into their designated positions on the mounting frame. These bolts help maintain the correct distance and alignment for the actuator plate.
- Attach Push Rods and Interruption Lever: Connect the push rod(s) and interruption lever to the flush mechanism within the cistern. These components transmit the force from the actuator buttons to the flush valve. The push bars are designed for tool-free adjustment.
- Mount the Actuator Plate: Carefully align the Sigma30 actuator plate with the mounting frame and spacer bolts. Press the plate firmly into place until it clicks or is securely fastened. The plate is designed to be screwable for a secure fit.
- Test Functionality: Once installed, test the flush mechanism to ensure both the stop and go functions operate correctly and smoothly.
4. Operating Instructions
The Geberit Sigma30 Actuator Plate utilizes a stop-and-go flush system, offering control over water usage.
- Full Flush (Go): Press the larger button (or the designated button for full flush) to initiate a full flush. The flush will continue until the cistern is empty.
- Stop Flush (Stop): For a water-saving flush, press the smaller button (or the designated button for stop flush). The flush will begin, and you can press the same button again to stop the water flow at any desired point.
- Actuation Force: The actuator plate is designed for light operation, requiring an actuation force of less than 20 N.
5. Maintenance
To ensure the longevity and appearance of your Geberit Sigma30 Actuator Plate, follow these maintenance guidelines:
- Regular Cleaning: The plate features an easy-to-clean coated surface. Clean regularly with a soft, damp cloth and a mild, non-abrasive cleaning agent.
- Avoid Harsh Chemicals: Do not use abrasive cleaners, scouring pads, or strong chemical detergents, as these can damage the surface finish.
- Inspect for Wear: Periodically check the push buttons and the plate for any signs of wear or damage.
- Internal Components: If internal components require cleaning or adjustment, it is recommended to consult a qualified plumber or Geberit service technician.
6. Troubleshooting
This section addresses common issues you might encounter with your actuator plate. For more complex problems, contact customer support.
- Flush Not Activating:
- Ensure the push rods are correctly connected to the flush mechanism.
- Check if the actuator plate is securely mounted and not obstructed.
- Weak Flush:
- Verify that the push rods are properly adjusted and making full contact with the flush valve.
- Inspect the cistern's internal components for any blockages or issues with the flush valve itself.
- Actuator Plate Feels Loose:
- Check the screws securing the mounting frame and ensure the plate is properly clipped or screwed into place.
- Ensure spacer bolts are correctly installed.
7. Specifications
| Manufacturer | Geberit |
| Part Number | 115.893.JT.1 |
| Item Model Number | 115893JT1 |
| Item Weight | 2.42 pounds |
| Product Dimensions | 13.03 x 7.68 x 1.77 inches |
| Color | White (matt coated) |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |
| Actuation Force | < 20 N |
8. Warranty and Support
For information regarding product warranty, technical support, or service inquiries, please contact Geberit directly through their official website or customer service channels. Keep your purchase receipt and model number (115893JT1) handy when contacting support.
No official product videos were found for this item. For visual guidance, please refer to the detailed instructions provided in this manual or consult a professional installer.





