Geberit Duofix Installation Manual
Brand: Geberit
Product Data
Product Specifications
Concealed tank and bowl carrier, wall-hung two-hole toilet bowl and actuator plate. Geberit Model No. 111.012.00.1. The tank and carrier system shall fit within a minimum 5 1/2" (140) deep wall with studs placed 19 3/4" (500) apart. Water supply shall be 1/2" copper, with a minimum water pressure of 35 PSI. The bowl shall be an IAMPO listed 1.6 gallon (6 l) per flush wall-hung bowl. The carrier shall have adjustable height for a 15" (381) to 19" (483) bowl rim height. Actuator plates shall be die-cast zinc, plastic, or stainless steel and plated to preserve material integrity.
UPC Certified
Features
- Square structural 16 gauge powder coated steel frame.
- Water consumption: Dual flush system allows for 0.8 GPF (3 l) or 1.6 GPF (6 l).
- Actuator dimension: 8 3/8" (212) width, 5 2/3" (142) height.
- Carrier height adjustable range: 15" (381) to 19" (483) bowl rim height.
- Impact resistant high density polyethylene tank (HDPE).
- Insulated to prevent condensation.
- Anti-siphon fill valve meets ANSI / ASSE 1002-99 standard.
Dimensions
A technical drawing illustrating the physical dimensions of the Geberit Duofix system. It shows measurements for width (e.g., 19 3/4"), height (e.g., 29 3/4"), depth (e.g., 5 1/2"), and distances between mounting points. Key labels include 'FRH' (Finished Rim Height) and 'FF' (Finished Floor).
Material Determination
Recommended material for wall surface construction:
- Gypsum / green board
- Cement board
- Tile backer board
- Ceramic tile surface
ℹ️ Wall thickness not to exceed 3".
Options
- Omega20, Dual flush actuator
- Omega30, Dual flush actuator
- Omega60, Dual flush actuator
Vertical discharge elbow 3" DWV standard:
- Horizontal left: 366.914.16.1
- Horizontal right: 366.913.16.1
Warranty
- Limited lifetime warranty on tank and carrier.
- 10 year warranty on fill valve and flush valve.
- One year warranty on actuator plate.
Installation
Installation Requirements
To install the tank and carrier, a 2 x 6" wood frame or metal frame construction is required. Studs must be placed 19 3/4" apart (clearance) where the carrier will be positioned inside the wall.
Bowl Finished Rim Height (FRH)
Remove the carrier and installation hardware from its box. Determine the FRH for the wall-hung bowl and adjust the carrier height in accordance with the requirement. Dimensions can be taken from the bowl or carrier specification sheet. Be sure to allow for finished floor and sole plate height.
Discharge Elbow Installation
Diagrams illustrating the connection of the discharge elbow. Shows different angles and configurations for horizontal left, horizontal right, and vertical discharge pipes, with corresponding measurement ranges (e.g., 3 1/2" to 4 3/4" and 3 1/8" to 5 3/16").
Diagrams 1-4: Illustrate the process of connecting the discharge elbow, showing pipe insertion, seal fitting, and measurement marking.
Tank and Carrier Installation
- Locate carrier supporting studs and reinforce with additional nails. Ensure rough-in for the carrier is plumb and square. Wall framework must be affixed to the floor and ceiling for maximum support.
- Position carrier unit in the prepared opening. Carrier face plate must be flush with the front of the surrounding studs to ensure maximum support for the wall sheeting (applied later). With the carrier still in place, mark all anchor and bolt hole locations on the sole plate and studs. Mark the location for the 3" DWV discharge pipe.
- Pull out carrier from framework and drill six (6) pilot holes (3/16") for the supplied lag screws where marked on the sole plate. Also drill six (6) bolt holes (5/16") where marked on both studs. Use a hole saw and bore a 4" hole through the sole plate and floor for the discharge stop-out pipe.
- Install 3" DWV waste pipe through the floor and connect to the waste line (e.g., PVC, copper, cast iron).
- Set carrier unit sideways back into the framework and bolt in place with hardware provided.
- Complete waste elbow connection with the 3" DWV shielded coupling (D - provided) to the waste pipe.
- Install two (2) 1/2" x 6" fixture support rods with plastic sleeves (A), yellow pipe caps (B), and mud guard (C) for protection during wall surface construction.
Diagram illustrating the tank and carrier installation process, showing mounting to studs, drilling, waste pipe installation, and elbow connection. Key components are labeled A, B, C, and D.
Diagram showing fixture support rods, pipe caps, and mud guard being installed.
Visual indicators showing a range of 0° to 45°.
ℹ️ For finishing the installation of the bowl and actuator plate, see detailed instructions.
Water Supply Installation
- Diagram 1: Shows the carrier unit with water supply connection points highlighted, indicated by numbered circles [part 1] and [part 2].
- Diagram 2: Close-up of the NPT 1/2" elbow and fill valve components.
- Diagram 3: Illustrates connecting the water supply pipe and elbow to the carrier unit. Parts indicated by numbered circles [part 1] and [part 2].
- Diagram 4: Shows further connection of the water supply pipe, with a rotational arrow indicating tightening.
Mud Guard Installation
- Diagram 1: Shows the placement of the mud guard and insulation pad. Parts indicated by numbered circles [part 1] and [part 2].
- Diagram 2: Shows the mud guard and insulation pad fitted into place.
Bowl Installation
- Remove yellow protection plugs and seals from pipes.
- Insert discharge pipe into the pipe hub in the wall. Place a straight edge flush against the wall and mark a line on the pipe. Fit finned rubber seal onto flush pipe. Repeat same procedure for discharge pipe.
- Place discharge pipe with gasket into waste outlet of bowl. Also place flush pipe with fin gasket into inlet of bowl. Then mark a second line on both pipes.
- Install wall surface material such as high density Gypsum / green Board, Cement Board, Tile Backer Board with optional ceramic tile finish surface as the most suitable materials. Provide cut outs for the protruding parts like inlet and outlet pipes and the rectangular access box.
- Add dimension X and 1/8". Using that dimension, mark a line on the pipe measuring from the hub side. Cut off the pipe at the line with a pipe cutter.
- Add dimension Y and 1/8". Using that dimension, mark a line on the pipe measuring from the hub side. Cut off the pipe at the line with a pipe cutter.
- Bevel the sharp edges as shown to assure a smooth insertion into the pipe hubs in the wall.
- Install both seals into the pipes in the wall. Lubricate seals with appropriate rubber seal lubricant.
- Remove protective sleeves from mounting rods. Determine protruding rod length for bowl installation. Install both pipes into the hubs in the wall.
- Place bowl onto rods. Attach cap washer with nose up and facing forwards onto rods. Install washer and hex nuts, hand tighten. Level bowl. Tighten hex nuts. Snap on the bolt caps. Cut off insulation pad if mounted.
- Seal gap around bowl with silicone.
Diagrams illustrating the removal of protective plugs and seals from pipes.
Diagram showing insertion of discharge and flush pipes into the wall hub, fitting seals, and marking cut lines.
Diagram illustrating the installation of wall surface materials and the need for cutouts.
Diagrams showing pipe cutting based on dimensions X and Y, adding 1/8" (3 mm) and marking cut lines.
Diagram illustrating beveling pipe edges for smooth insertion.
Diagram showing installation of seals into wall pipes and lubrication.
Diagram depicting installation of pipes into wall hubs after preparing mounting rods.
Diagrams showing the wall-hung bowl being placed onto mounting rods, secured with washers and nuts, leveled, and finished with bolt caps.
Diagram illustrating the application of silicone sealant around the bowl.
⚠️ CAUTION: High torque forces. WC ceramic appliance may break. ► Do not overtighten hex nuts.
ℹ️ Sound insulation pad is optional or required.
Contact Information
Geberit
2100 Clearwater Drive, Des Plaines, IL 60018-5999
Phone: (847) 803 5000 | Fax: 847/803-5454
For Technical Assistance: 800 / TEC-TRUE (800-832-8783)
www.geberit.us
Geberit International AG
Schachenstrasse 77, CH-8645 Jona
T +41 55 221 63 00 | F +41 55 221 63 16
documentation@geberit.com
www.geberit.com
