Geberit Duofix Installation Manual
Brand: Geberit
Product: Duofix In-Wall Carrier System
Important Information
⚠️ Water Quality
ATTENTION: Damage to device from aggressive disinfectants. Do NOT insert any tablets, fluids, gels or additives containing chlorine, as this substance will corrode/damage cistern parts and VOID WARRANTY. Only potable water with <= 4 ppm chlorine concentration in water allowed, including whole house (centralized) water treatments.
⚠️ Water Temperature
ATTENTION: Damage to device from unacceptable water temperature. The water temperature in the cistern must always remain between 0.5°C [33°F] and 25.0°C [77°F] to avoid freezing and condensation that can cause damage to the product and/or property damage.
Product Specifications
- Geberit Model No. / Flush volume:
- 111.335.00.5 / 1.6/0.8 gpf (6.0/3.0 lpf)
- 111.902.00.5 / 1.12/0.8 gpf (4.8/3.0 lpf)
- Application: For installing valves mounted on two-hole studs for wall-hung washdown WCs with rear water inlet and waste outlet. For mounting in or in front of drywalls. For mounting in front of solid walls. For Geberit actuator plates Sigma.
- Installation Clearance: Fits within minimum 53½" (150 mm) bare-brick wall or pipe installation.
- Compliance: Approved for use in the US and Canada (cUPC®).
Properties
- Powder-coated steel frame, rated for 400 kg (880lbs) load, with depth gauge 16 without damage to finished wall or carrier unit.
- Shockproof concealed tank, fully insulated against condensation, made of high-density polyethylene (HDPE).
- Backflow-preventing fill valve.
Warranty
- Limited lifetime warranty on tank and carrier.
- 10 year warranty on fill valve and flush valve.
Material Determination
Recommended material for wall surface construction:
- Gypsum / green board
- Cement board
- Tile backer board
- Ceramic tile board
Minimum covering thickness: 3/8" (10 mm).
Maintenance Recommendations
Geberit recommends conducting biennial inspections of cistern internal components including supply stop (angle valve), supply hose, filling (float) valve and flushing valve.
- ENSURE moving parts are free to move without binding or misalignment.
- TIGHTEN any water connections that feel loose.
- REPLACE supply hose if it shows any signs of wear or discoloration of the external braiding.
- CLEAN or REPLACE flush valve seal if it shows any signs wear, discoloration, or other damage.
Installation Instructions
Overview of Wall Construction Types
The Geberit Duofix system can be installed in different wall constructions. The primary methods shown are for wooden stud construction (A) or metal stud construction (B).
For wooden stud construction (A) or metal stud construction (B) measuring 2 x 6", the following is required for mounting the installation element:
[Diagram description: Shows two types of wall framing. Type A shows wooden studs. Type B shows metal studs. Both are illustrated with dimensions and indicate suitability for mounting the Duofix element.]
Option 1A: Wooden Stud Construction
[Diagram description: Illustrates the installation of the Duofix frame into a wooden stud wall. Shows the frame being positioned and secured. Indicates the use of screws.]
Option 1B: Metal Stud Construction
[Diagram description: Illustrates the installation of the Duofix frame into a metal stud wall. Shows the frame being positioned and secured. Indicates the use of screws.]
Step 1: Mounting the Installation Element
[Diagram description: Shows the Geberit Duofix frame being assembled and positioned. It illustrates how to adjust the height using levers ([Step 1] and [Step 2]) and how to place it on the floor. Indicates the use of a [13mm wrench] for adjustments. Shows the frame being placed against the wall studs.]
Action: Assemble and position the Geberit Duofix frame. Adjust the height using the integrated levers. Secure the frame to the wall studs using appropriate fasteners (e.g., screws). Use a [13mm wrench] for adjustments.
Dimensions indicated: Height adjustment range, floor clearance (FF), and overall frame dimensions.
Step 2: Securing the Frame to the Wall
[Diagram description: Shows the frame being secured to the wall studs. It illustrates the use of screws and a level to ensure the frame is plumb and stable. Indicates the use of a [13mm wrench] for tightening.]
Action: Ensure the frame is plumb and securely fastened to the wall structure. Use a [13mm wrench] to tighten all mounting points.
Dimensions indicated: Wall mounting points, and finished floor indicator (FF).
Step 3: Adjusting the Frame Position
[Diagram description: Shows the frame being adjusted laterally and vertically within the wall structure. It illustrates how to release and re-lock adjustable brackets to achieve the correct positioning.]
Action: Adjust the frame's position to fit the wall opening precisely. Ensure it is level and stable.
Step 4: Pre-drilling and Fastening
[Diagram description: Shows pre-drilling holes in the wall studs and then inserting screws to secure the frame. It indicates the use of specific drill bit sizes (e.g., Ø 10 mm, Ø 13 mm) and screw types.]
Action: Pre-drill holes as indicated and fasten the frame securely to the wall studs using the provided or recommended screws. Use appropriate tools like a [10mm drill bit] and [13mm wrench].
Diagram shows screw insertion points and indicates minimum wall thickness requirements.
Step 5: Checking Frame Alignment
[Diagram description: Illustrates checking the frame's alignment using a level and measuring tape. It shows a checkmark (✔️) for correct alignment and a cross mark (❌) for incorrect alignment, emphasizing the importance of precise positioning.]
Action: Verify that the frame is perfectly level and plumb. Correct any misalignments before proceeding.
Step 6: Installing Support Brackets
[Diagram description: Shows the installation of additional support brackets to the frame. These brackets provide extra stability and mounting points. It indicates the use of a [13mm wrench] for tightening.]
Action: Attach and tighten the support brackets to the main frame.
Step 7: Connecting Waste Outlet to Drain Pipe
[Diagram description: Illustrates the connection of the waste outlet pipe to the building's drain pipe. It shows the supplied HDPE fitting and notes that it cannot be glued. It also indicates that the supplied coupling is for 3" plastic pipes and that alternative couplings may be needed for other materials.]
Action: Connect the waste outlet to the drain pipe using the provided fitting. Ensure compatibility with your existing drainage system or use an appropriate adapter.
Note: Supplied fitting is HDPE and cannot be glued. Supplied coupling connects to 3" plastic drainage pipes only. To connect supplied waste bend to other materials, purchase an alternate coupling, with one end for 3" plastic.
Step 8: Installing the Cistern and Fill Valve
[Diagram description: Shows the installation of the concealed cistern unit into the frame. It also illustrates the connection of the fill valve, indicating the use of a [19mm wrench] and a [NPT 1/2 inch thread] connection. Various sealing options for the waste outlet are shown ([Option A] through [Option F]).]
Action: Install the concealed cistern and connect the fill valve. Ensure all connections are secure. Select the appropriate sealing ring for the waste outlet connection.
Diagrams show different sealing ring options (A-F) for the waste outlet.
Step 9: Connecting the Flush Valve
[Diagram description: Shows the connection of the flush valve mechanism to the cistern. It illustrates the process of securing the flush valve and its components.]
Action: Install and connect the flush valve assembly.
Step 10: Finalizing Connections and Testing
[Diagram description: Shows the final water supply connections and the testing of the flush mechanism. It indicates the use of a [PH 2 screwdriver] for some adjustments and mentions "Sigma60" possibly referring to an actuator plate compatibility or a specific feature. It also shows part number 243.168.00.1.]
Action: Complete all water supply connections. Test the flushing mechanism and check for leaks. Ensure compatibility with Sigma actuator plates.
Refer to part number 243.168.00.1 for related components.
Step 11: Wall Cladding and Finishing
[Diagram description: Illustrates the process of cladding the installed Duofix system with wall materials (e.g., drywall, tiles). It shows the frame integrated into the wall structure, ready for finishing. It also indicates alignment marks ([Alignment mark 0]) for precise cladding placement.]
Action: Install wall cladding materials around the Duofix frame, ensuring proper alignment and coverage.
Step 12: Electrical Connections (if applicable)
[Diagram description: Shows potential electrical connection points and requirements, indicated by electrical symbols ([Electrical connection symbol], [Plug symbol]) and a minimum distance requirement ([Minimum 12 units]). This might relate to electronic flush actuators or other accessories.]
Action: Make any necessary electrical connections according to local codes and manufacturer guidelines.
Step 13: Final Inspection
[Diagram description: A cross-section view of the completed installation, showing the Duofix system concealed within the finished wall, ready for use.]
Action: Perform a final inspection of the entire installation to ensure everything is secure, functional, and meets safety standards.
Contact Information
Geberit USA
2100 South Clearwater Drive
Des Plaines, IL 60018 US
Phone: 847/803-5000
Fax: 847/803-5454
Technical: 800/832-8783
Website: www.geberit.us
