Duravit
Duofix Sigma 1120mm WC Frame & Concealed Cistern with Sigma20 Round Flush Plate
In Stock
Available now and ready for dispatch.
Delivery typically 2–5 working days.
Colour
Matt Black / Gloss ...
Regular price
£371.90
We help design your perfect bathroom using 2D and 3D visuals, so you're confident before you buy. Our team is here at every step — from selecting the right fittings to aftercare support once your bathroom is complete.
Find out moreWarranty
Every product comes with the full manufacturer's warranty. We also offer the Soaque Warranty — a service guarantee that goes above and beyond the legal minimum, ensuring you receive aftercare you can trust.
Delivery
We work with trusted couriers and consolidate orders where possible. Some products are delivered kerbside on pallets — onward handling into the property is the customer's responsibility. Items may occasionally arrive separately.
Returns
You have 14 days from receipt to request a return for a full refund. Due to the specialist nature of our products, returns can be costly — we encourage you to speak with our team before ordering. Return delivery costs are the customer's responsibility.
In Stock
Available now and ready for dispatch.
Delivery typically 2–5 working days.
Colour
Matt Black / Gloss ...
Regular price
£371.90
We help design your perfect bathroom using 2D and 3D visuals, so you're confident before you buy. Our team is here at every step — from selecting the right fittings to aftercare support once your bathroom is complete.
Find out moreWarranty
Every product comes with the full manufacturer's warranty. We also offer the Soaque Warranty — a service guarantee that goes above and beyond the legal minimum, ensuring you receive aftercare you can trust.
Delivery
We work with trusted couriers and consolidate orders where possible. Some products are delivered kerbside on pallets — onward handling into the property is the customer's responsibility. Items may occasionally arrive separately.
Returns
You have 14 days from receipt to request a return for a full refund. Due to the specialist nature of our products, returns can be costly — we encourage you to speak with our team before ordering. Return delivery costs are the customer's responsibility.
About this product
Duofix Sigma 1120mm WC Frame & Concealed Cistern with Sigma20 Round Flush Plate
Part of Geberit's Sigma range, this set pairs the 1120mm Duofix wall-hung WC frame and 12cm concealed cistern with the Sigma20 Round dual-flush plate, giving everything needed for a coordinated, ready-to-install WC installation. The 1120mm frame height suits standard full-height pre-wall constructions, finished with the round-button plate on the wall.
Key Features
- Frame height 1120mm, cistern depth 120mm — suitable for standard full-height pre-wall installations
- Next-generation Sigma cistern — over 30% quieter than the previous model, optimised hydraulics (2–4L small / 5.8L large)
- 40% faster installation than its predecessor, with pull-out side fastening plate, hexalobular screws, and laser markings
- Supports wall-hung WC pans up to 700mm projection — strength-tested to 400kg when combined with Geberit wall-hung pans
- WRAS approved — water supply components certified for UK use
- 50-year spare parts guarantee
- Dual-flush circular buttons for a full or water-saving reduced flush
- Mechanical front actuation with sound-absorbing actuator rods for quiet operation
- Tool-free fast adjustment for straightforward fitting
- Flush plate measures 246mm wide by 164mm high
- Supplied as a matched frame, cistern and flush plate set, ready for a single coordinated installation
Why Choose Geberit
With over 150 years of engineering expertise and more than 70 million concealed cisterns installed worldwide, Geberit is the trusted name behind some of Europe's most reliable bathroom systems. Every cistern is leak-tested before leaving the factory, and the Sigma range is designed to deliver consistent, quiet performance day after day — backed by a 50-year spare parts commitment that reflects confidence in long-term quality.
Care & Installation
Wipe with a soft cloth; avoid abrasive cleaners. Follow the enclosed installation instructions for best results.
Also featured in