Geberit Duofix Alpha 12 cm Support Frame (Height 82 cm), for Installation in Drywall

Usage

• For drywall construction
• For partial-height wall-mounted installations
• For wall-hung toilets with connection dimensions according to EN 33:2011
• For wall-hung toilets
• For dual-flush systems
• For screed heights of 0–20 cm

Technical Features

• Thermo-lacquered self-supporting frame
• Open-top frame
• Frame prepared for WC ceramic supports with small contact surfaces
• Galvanized support legs
• Adjustable support legs (0–20 cm)
• Frame with ø 9 mm drilling hole for fixing in wooden structures
• Concealed cistern with front or top actuation
• Cistern insulated against condensation
• Side or rear water supply, on the left
• Reservation box for service hatch, which can be trimmed

Product Details

• Dynamic Pressure: 0.1 - 10 bars
• Flush Volume, Factory Setting: 6 and 3 L
• Large Flush Volume, Adjustment Range: 4 / 4.5 / 6 / 7.5 L
• Small Flush Volume, Adjustment Range: 2 - 4 L

Advantages of the Geberit Support Frame

• Seamless one-piece PEHD concealed cistern
• The base shell of the support frame is molded in one piece using a blow-molding process. The absence of seams ensures consistent strength, an important advantage for concealed installations.
• To optimize reliability, each shell undergoes individual leak tests to ensure the absence of hidden defects. The shell is also designed to withstand external pressure, featuring internal reinforcements to prevent deformation during installation.
• Sturdy steel chassis
• Easily accessible functional components
• Spare parts availability guaranteed for 50 years
• Simple installation
• Over 50 years of experience in concealed cisterns

Advantages of the Geberit Fill Valve

The fill valve is likely the most sophisticated part of the cistern. After extensive testing in our acoustic laboratory, we identified and precisely analyzed the noise disturbances caused by traditional fill valves. As a result, the water inlet was specially designed to minimize noise propagation in the supply pipeline. The extended downpipe also allows for silent filling below the water level. The Geberit Unifill, classified as acoustic, has received the NF mark.

To further enhance this near-silent soundproofing, Geberit actuators are mounted on small rubber gaskets that dampen the noise produced by mechanical components when pressure is applied to the control plate.

Resistance Tests

The cisterns are designed and tested to withstand loads of up to 400 kg.

Quality Control

To ensure impeccable quality, each Geberit concealed cistern undergoes rigorous inspection before shipment. Inside the packaging, you will find a control slip certifying the exact weight of the item. This document confirms that the product has been inspected in the factory according to Geberit's quality standards, ensuring a reliable, compliant, and ready-to-install product.

Explanation of the Control Slip:

• Top of the Ticket:
  • Kontrollabschnitt = Control Slip
  • Geberit Prod. GmbH = Geberit Company
  • VER0007 = Internal number or process verification code
• Product-Specific Data:
  • Datum: 10.04.2025 at 22:14 → Date and time of inspection
  • Art-Nr: 458.212.00.1 → Article number
  • Pers. Nr.: 6281;6327 → ID number of the person (or operator) who performed the inspection
• Weight:
  • Soll-Gew.: 1.82 kg → Expected theoretical weight
  • Ist-Gew.: 1.82 kg → Measured (actual) weight
  • The “N” indicates that the measured weight is compliant (“Normal”)
• Bottom of the Ticket:
  • “Qualitätsbeleg bei Beanstandung mit Ware zurück. Danke.” → “Please return this quality slip with the product in case of a complaint. Thank you.”

Conclusion:

This ticket shows that a quality inspection was performed on April 10, 2025, at 22:14. The measured weight matches the expected weight exactly, indicating the product is compliant. This ticket should be retained in case of complaints.

Installation Video

Watch the installation video