Introduction
Geberit provides a comprehensive range of installation systems for wall-hung toilets, including concealed cisterns, actuators, and carrier frames, designed for 2x4 wall constructions in the United States. The Geberit Duofix and Sigma series are central to these systems, offering modular components for prewall installation that allow for design flexibility and functional reliability. This article explores the technical specifications, installation procedures, and compatibility details of these systems based on official documentation provided by Geberit North America.
The Geberit Duofix concealed cistern system, model 111.798.00.1, is a key component for 1.6/0.8 gallons per flush (GPF) and 1.28/0.8 GPF configurations. Installation guides, product dimensions, and material requirements are available in detailed manuals, with additional support for integration with Geberit AquaClean models. Compatibility with various actuator plates, such as the FLP500, ensures user-friendly operation across different flush volumes and wall constructions.
Technical Specifications and Model Overview
The Geberit Duofix system includes a concealed cistern designed for wall-hung toilets, with a focus on 2x4 wall applications. Model 111.798.00.1 supports a dual-flush mechanism with a maximum flush volume of 1.6 GPF and a reduced flush of 0.8 GPF. This model is constructed from high-density polyethylene (HDPE), with an insulated tank to prevent condensation. The carrier frame is made of 16-gauge powder-coated steel, rated to support up to 880 lbs (400 kg) without damage to the wall or carrier unit.
Geberit also offers a 1.28/0.8 GPF variant, model 111.597.00.1, which provides a slightly lower flush volume for water conservation applications. Both models are compatible with a range of actuator plates, including the FLP500 and Sigma series controls. The carrier system includes rough-in materials and installation instructions for drywall or solid wall constructions.
The Sigma series includes electronic and mechanical actuators, such as the Sigma 10 WC dual-flush control, which supports both automatic and manual operation. These actuators are available in finishes such as polished chrome and matte black, with compatibility across multiple Geberit carrier models.
Installation Procedures and Material Requirements
Installation of the Geberit Duofix system requires a detailed understanding of the prewall and drywall construction, as outlined in the manufacturer’s installation instructions. The system is designed for 2x4 wall applications, with specific dimensional guidelines for the carrier frame and cistern positioning. For example, the system requires a minimum wall cavity depth of 9.375 inches and a minimum drywall thickness of 0.5 inches. These dimensions ensure proper alignment and secure mounting of the cistern and carrier frame.
The installation process includes several key steps: preparing the wall cavity, mounting the carrier frame, installing the concealed cistern, connecting the water supply and waste lines, and integrating the actuator plate. The carrier frame is made of 16-gauge powder-coated steel and includes mounting brackets for secure attachment to the wall studs. The cistern is then mounted within the carrier frame and connected to the wall using supplied hardware.
Water supply lines must be connected to the cistern using 3/8-inch NPT fittings, while the waste line requires a 3-inch NPT connection. The installation instructions also include guidance on integrating the actuator plate, with specific recommendations for placement and alignment relative to the toilet bowl.
For 1.28/0.8 GPF configurations, the installation process is similar but includes additional considerations for reduced flush volumes. The carrier frame and cistern must be adjusted to accommodate the smaller water capacity, with specific instructions on fill valve settings and flush valve adjustments.
Compatibility and System Integration
The Geberit Duofix and Sigma systems are designed to integrate with a variety of wall-hung toilet models, including those from Duravit, TOTO, and other manufacturers. The system supports both rimless and traditional rimmed toilet designs, with specific carrier models available for different bowl configurations. For example, the 111.335.00.5 carrier is optimized for rimmed toilets, while the 111.902.00.5 is designed for rimless applications.
Actuator plate compatibility is a critical consideration, with several options available to suit different user preferences and design aesthetics. The FLP500 actuator plate, for instance, is a 6.125-inch rectangular dual-flush control with an antique brass finish. It is compatible with all major Geberit carrier models, including 111.335.00.5, 111.798.00.1, 111.902.00.5, and 111.597.00.1. This actuator plate includes a frame kit and meets the requirements of ASME A112.18.1-2005/CSA B125.1-05 standards.
The Sigma series actuators provide additional functionality, including electronic actuation and manual override options. These controls are available in various finishes, such as polished chrome and matte black, and support both single-flush and dual-flush configurations. The Sigma 10 WC dual-flush control, for example, includes a CR1157KH1 model with an electronic actuation plate, suitable for integration with Geberit AquaClean models.
Technical Considerations and Safety Guidelines
Geberit installation systems are designed to meet structural and safety standards for residential and commercial applications. The carrier frames and cisterns are tested for load capacity, with a rating of up to 880 lbs (400 kg) without damage to the wall or carrier unit. This ensures long-term stability and prevents structural issues during use.
Water temperature compatibility is another important consideration, with the system designed for water supply temperatures between 32°F (0°C) and 65°F (18°C). This range is suitable for most residential applications and ensures optimal performance of the cistern and flush mechanism.
Installation manuals also include guidance on avoiding siphonage and ensuring proper water flow. The anti-siphon fill valve included in the system helps prevent backflow and ensures consistent water levels within the cistern. The fill valve is constructed from high-density polyethylene (HDPE) and includes a pressure-regulating mechanism to maintain stable water pressure during operation.
The system also includes a built-in overflow protection mechanism, with the cistern designed to prevent overfilling and potential water damage. This feature is particularly important in residential applications, where unexpected water supply fluctuations can occur.
Maintenance and Serviceability
Geberit installation systems are designed with maintenance and serviceability in mind, with accessible components and modular construction. The concealed cistern and carrier frame are designed for easy disassembly and reassembly, allowing for routine maintenance and repairs without requiring complete system removal. The installation manuals provide step-by-step guidance for inspecting and replacing components such as the fill valve, flush valve, and actuator plate.
The actuator plate is also designed for easy replacement, with a modular mounting system that allows for quick installation and removal. This is particularly useful in commercial settings, where frequent maintenance and component replacement may be necessary.
The system includes a warranty period, with specific terms outlined in the installation manual. The warranty covers defects in materials and workmanship but does not include damage caused by improper installation or use. Users are advised to follow the manufacturer’s installation instructions carefully to ensure full warranty coverage.
Environmental and Water Conservation Features
The Geberit Duofix and Sigma systems include features designed to promote water conservation and environmental sustainability. The dual-flush mechanism allows users to choose between a full flush and a reduced flush, depending on the waste type. This can lead to significant water savings over time, particularly in commercial or multi-user settings.
The system also includes an insulated cistern to prevent condensation and reduce energy consumption. This helps maintain a stable water temperature within the cistern, reducing the need for additional heating or cooling.
Geberit also offers compatibility with Geberit AquaClean models, which provide additional hygiene benefits through antibacterial surfaces and automatic cleaning cycles. These models are designed to reduce the need for manual cleaning and improve overall bathroom hygiene.
Conclusion
The Geberit installation systems, including the Duofix and Sigma series, offer a comprehensive solution for wall-hung toilets in 2x4 wall constructions. These systems provide a balance of design flexibility, functional reliability, and water conservation benefits. The technical specifications, installation procedures, and compatibility details outlined in the manufacturer’s documentation ensure that users can implement these systems with confidence.
By following the detailed installation instructions and material requirements, users can ensure a secure and stable installation that meets structural and safety standards. The compatibility with various actuator plates and carrier models allows for customization to suit different user preferences and design aesthetics. Additionally, the environmental and water conservation features of the system make it an attractive option for residential and commercial applications.
For further assistance, users are encouraged to consult the official Geberit documentation and installation manuals. These resources provide step-by-step guidance and technical specifications to support a successful installation.