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Mounting Frames & Cisterns

Gerberit Sigma 12cm Concealed Dual Flush Cistern

Gerberit Sigma 12cm Concealed Dual Flush Cistern

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Geberit Sigma 12cm Dual Flush Concealed Cistern

The Geberit Sigma 12cm Dual Flush Concealed Cistern offers an easy solution for flushing a back to wall floor-standing toilet. Geberit is one of the most respected manufacturers of toilet cisterns and frames and their array of innovative designs will make sure your new toilet will look good and work well. It is part of the newly designed Sigma range and as such you will have a large choice of matching flush plates to choose from (not included) The key features of the Geberit cistern are its one piece moulded design so there is no way water can leak plus it is fully insulated to stop condensation forming in the cavity. Another, and just as important innovation, is that all water connections are accessible but hidden behind the flush plate which can be removed for servicing or maintenance.

All fixings are provided and you will be pleased with the low noise water fill which uses 6 or 3 litres. As well as conventional flush plates, it can be used with a remote pneumatic button or infra-red flush controls.


Application purpose

•For concealed installation

•For back to wall floor-standing WCs


•Concealed cistern fully insulated against condensation

•Front actuation only

•Protection cover for service opening can be mounted without tools and cut to length

•Dual flush with Sigma80 touchless, Sigma60, Sigma50, Sigma20, Sigma10 touchless, Sigma01 or Bolero flush plates

•Dual flush with pneumatic and mechanical buttons

•Single flush with Sigma10 or Tango flush plates

•Single flush with touchless flush or pneumatic buttons

•Water supply connection at centre back or at the top

•Flush bend has maximum 8 cm adjustment. Flush can be cut down by maximum of 8 cm

•Installation height 1080 mm (can be cut down, depending on the WC pan performance)

•Minimum install height 950 mm

•Fastening bracket adjustable in depth

•Cistern can be reversed to give access from behind in a duct situation when flushed with pneumatic buttons or touchless flush

•Flush valve features 6l and 4.5l flush settings to enable either a 6l and 3l flush or a 4.5l and 3l flush. For flush volumes of 4l and 2l a low flush beaker is required (241.894.00.1)

•The cistern can be operated with used water (rainwater) provided it is passed through a filter system first

•Note: must be used with pans designed for low volume flush.

Technical data

•Flow pressure range 0.1-10 bar

•Operating temperature water max. 25 °C

•Flush volume small range 3-4 l

•Flush volume factory setting 5.8 and 3 l

Scope of delivery

•Water supply connection R 1/2" male BSP parallel thread with integrated angle stop valve

•Protection housing for service opening

•Flush pipe ø 45 mm

•Fastening for flush bend

•Protection plug for flush pipe

•2 slotted flat irons

•2 fastening brackets, pre-mounted

•Fastening material


•Flush plate

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