Geberit Sigma Dual Flush Concealed Cistern - 2 and 7.5 Litres - For Marine and Seawater Applications

The Geberit Sigma Dual Flush Cistern is a high-quality concealed unit designed for modern bathrooms. It supports a dual flush mechanism to help save water and reduce water bills. Suitable for marine and seawater applications, this cistern is compatible with optional flush plates and both floor-standing and wall-hung WCs.

Crafted from durable plastic in a white finish, it blends seamlessly with white toilet pans and maintains an elegant bathroom appearance.

Manufacturing Details

• Manufacturing Code: 109.392.00.5
• Finish: White
• Material: Plastic

Technical Specifications

• Size (mm): 440 x 120 x 510 [Width x Depth x Height]
• Size (cm): 44 x 12 x 51 [Width x Depth x Height]
• Flow Pressure: 0.1–10 Bar
• Maximum Water Temperature: 25°C
• Factory Flush Volume: 6L / 3L
• Large Flush Adjustment Range: 4L / 4.5L / 6L / 7.5L
• Small Flush Adjustment Range: 2–4L

Installation & Compatibility

• Concealed cistern with front actuation
• Fully insulated against condensation
• Flush bend fitted
• Immediate post-flush possible (factory setting)
• Compatible with floor-standing and wall-hung WCs
• Suitable for low-volume flush pans
• Tool-free installation and maintenance
• For installation in:

• • Part-height prewall

  • Room-height prewall

  • Room-height installation walls

Water Supply & Operation

• Water supply connection on rear or top centre
• Partially seawater resistant connection
• Suitable for ships and seawater operation
• Can be operated with rainwater (with filter system)
• Flush valve supports:

• • 6L / 3L flush

  • 4.5L / 3L flush

Protection & Maintenance

• Protection cover box for service opening
• Protects against moisture and dirt
• Can be cut to length
• Increased maintenance required for seawater use (corrosion risk)

Scope of Delivery

• 2 × Fixing Brackets
• Fastening Material
• Flush Bend 90°
• Protection Box for Service Opening
• Water Supply Connection R 1/2"
• Integrated Angle Stop Valve
• Hand Wheel

Key Features

✔ Water supply connection on rear or top centre
✔ Suitable for ships and seawater operation
✔ Increased maintenance required due to corrosion risk
✔ Concealed installation with front actuation
✔ Dual flush water-saving system