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Geberit Sigma 12cm Dual Flush UP320 Concealed Cistern White


RRP: £239.54


In-Stock In Stock

4.0 out of 5 4.0 out of 5

Based on 6 Ratings.

Shipping: £7.95

Delivery in 3 Working Days Approx.
Key Features
  • Dual flush concealed cistern with front actuation
  • Concealed cistern fully insulated against condensation
  • Water supply connection on the rear or top centre
  • Made of plastic
SKU Code: QS-V39530

MFC Code: 109.309.00.5

Geberit Sigma 109.309.00.5 Details

Geberit presents a convenient and enchantingly alluring, Dual Flush WC Cistern. This white finished, a concealed cistern can be a splendid addition in bathrooms that prefer to save water. The product is the answer to meet the demands and aspirations of the homeowners who would like to keep their bathrooms spic and span to heighten the style quotient of the space.

This product is plastic with a flush bend and conveniently maintains a white finish. Smart features and outstanding reliability make this cistern the best value for money. Available at marginal cost from QS Supplies, this concealed cistern can be all yours instantly. Suitable to use with Floating Toilets.

  • The manufacturing code of this product is 109.309.00.5.
  • Width: 570mm (57cm).
  • Height [mm]: Min - 635mm - Max 720mm.
  • Height [cm]: Min - 63.5cm - Max - 72cm.
  • Comes in a white finish.
  • Comes with flush bend fitted.
  • Cistern fulfils standard requirements in accordance with EN 14055, Class II.
  • Immediate post flush possible with factory setting.
  • Tool-free installation and maintenance work on the concealed cistern.
  • The protection cover box for service opening protects against moisture and dirt.
  • The protection box for service opening can be cut to length.
  • Flow pressure: 0.1-10 bar.
  • Maximum operating temperature of water: 25 °C.
  • Flush volume factory setting: 5.8 and 3 l.
  • Flush volume small adjustment range: 3-4 l.
  • WC Pan, Seat, Basin, Pedestal and Brass-wares shown in the image are not included.
  • Refer technical drawing for more specification.
  • Please refer installation guide PDF below for more instructions.
  • Application purposes:.
  • For floor-standing WCs.
  • For drywall construction.
  • For installation in room-height installation walls.
  • For installation in part- or room-height pre-wall installations.
  • Scope of delivery:.
  • Water supply connection Rp 1/2" - R 1/2", compatible with MF, with integrated angle stop valve and hand wheel.
  • Flush bend 90°.
  • Protection plug.
  • 2x slotted flat irons.
  • 2x fixing brackets.
  • Fastening for flush bend.
  • Flush bend extension Ø 45mm (4.5cm).
  • Protection box for service opening.
  • Cup for flush volume reduction 4.0 / 2.6 l.
  • Fastening material.

Please Note: Must be used with pans designed for low volume flush, Flush valve features settings to enable either a 6 l and 3 l flush or a 4.5 l and 3 l flush, The cistern can be operated with used water rainwater provided it is passed through a filter system first.

Info / Size (mm)

  • Cistern
  • Width: 570 mm
  • Depth: 160 mm
  • Height: 635 mm

Technical Specifications

Please note all the measurements are in 'mm'
  • ⤷ Colour
  • : White
  • ⤷ Country of Origin
  • : Germany
  • ⤷ Material
  • : Plastic
  • ⤷ Flush Type
  • : Dual Flush
  • ⤷ Full Flush Volume in litres
  • : 5.8
  • ⤷ Half Flush Volume in litres
  • : 3
  • ⤷ Cistern Lever Or Button Placement
  • : Front
  • ⤷ Width
  • : 570
  • ⤷ Depth
  • : 160
  • ⤷ Height
  • : 635
  • ⤷ Fixings included
  • : Yes
  • ⤷ Inlet Type
  • : Centre, Back | Top

Additional Info & Downloads

Total: £135.00 6 Working Days Approx QS Supplies

2 Features Included In This Product Explained



A toilet with a flushing mechanism with two different buttons for flushing solid and liquid waste, thereby saving water.



Drywall, or wallboard, also called plasterboard or gypsum board, is a common building material used in interiors for constructing walls and ceilings. Drywall is gypsum plaster in the middle with layers of paper or fiberglass mats on either side. Drywalls do not need mortar or plaster. The gypsum core is rigid, and the other surface is smooth.

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From : Raydon IPSWICH Overall Rating: Date: September 19, 2020 Excellent cistern
Geberit concealed cisterns appear to be the de facto choice for quality when installing a back-to-wall WC. I used the Sigma 12cm UP320 unit. Very clever design and precise manufacture. The instructions were good and easy enough to follow. The unit comes up quite tall so just be aware that if you boxing in has to be limited for finished height. Other sized Sigma models are available in their range. Very pleased altogether and there was an appreciable range of dual-flush buttons to choose from - purchase separately.
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From : Wickford Overall Rating: Date: June 13, 2015 Geberit cistern
Quick efficient ordering and delivery service. Helpful staff. Easy to install.
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Value for Money

Questions & Answers

Submit Your Questions 7 Questions Answered

Have a question about this item? Ask our technical team. We aim to reply within 72 hours.

Parmy Asked :

Can this cistern be used with the following flush plate? Thanks Geberit Sigma30 246 x 164mm Dual Flush Plate QS-V6801 MFC Code: 115.883.KJ.1.

Answered By QS Team Answered by the QS Technical Team

The cistern and flush plate are compatible.

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Saurabh Asked :

Would you please let me know the location of the feed pipe connector on the Cistern?

Answered By QS Team Answered by the QS Technical Team

Refer to the attached specification sheet for the information required.

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Lucy Asked :

Geberit has advised me to contact the supplier we intend to use to find which concealed cistern is most suitable for us. We are looking to save as much space as possible, a pneumatic flush and access to the workings through the flush panel (saves the worry it will be in a frame and tiled) and using a back to wall pan rather than wall hung. I'm not sure which cistern would be most suitable. Would you be able to advise, please? I hope to get all the necessary fittings before the builder is here; we haven't chosen a plan yet as it depends on the cistern depth. The builder usually uses a different brand, and I want to make sure he doesn't encounter any problem, so I'm doing the leg work :) Many thanks for any advice you can offer :)

Answered By QS Team Answered by the QS Technical Team

Geberit does not make a cistern in a frame to suit the requirements you have mentioned. All our frames and cisterns are designed to work with wall-hung toilets. The only cistern we have for floor-mounted toilets is for use in furniture only and not mounted to a brick wall. In this matter, we are unable to assist.

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Khush Asked :

Is this system compatible with all RAK toilets? I have one installed, and the flush is so powerful that water splashes out on the initial burst. How can I slow this down?

Answered By QS Team Answered by the QS Technical Team

The Sigma cistern (109.309.00.5) is compatible with RAK and other floor standing back to wall toilets. Depending on the answer you can adjust the flash accordingly to either 6lt or 4.5lt flush volume by turning the flush valve inside the cistern.

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Phillip Asked :

Hi Will this fit into cabinet depth of 320mm Regards Phil

Answered By QS Team Answered by the QS Technical Team

Download Product DataSheet PDF. From PDF refer to the technical drawing. The portion in red circle is the maximum distance from the wall to the front of the cistern is 205mm. But if you want you can put batons behind the wall fixings to bring the cistern out further. You must put support, bracket or a block of wood fixed to the wall to support the flush pipe.

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Accepted Answer 1 Thumbs Down 0
Alison Asked :

Hi, I haven't' received a response to my query from a couple of days ago - please could you respond. I am asking whether this wall hung pan QS-V43395 is compatible with this cistern QS-V39530

Answered By QS Team Answered by the QS Technical Team

For Duravit Darling New pan we recommend a frame and cistern and not just the cistern on its own. Therefore this will be 111.383.00.5 For 111.383.00.5 -- Refer this url Alternatively, you can use the Duravit DuraSystem Standard Toilet Frame.

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Natalie Asked :

I see on the datasheet for the Geberit QS-V39530 that the height of the unit once installed is 108cm from the floor. I am wondering if this is a fixed height as I would like our boxing in to be shorter than this. Can the black flush pipe be adjusted to make the unit closer to the pan and therefore reduce the overall floor the top of boxing in height?

Answered By QS Team Answered by the QS Technical Team

Sorry for the delay responding, the flush pipe to be reduced by 8.5cm as per technical drawing of the cistern. You Can Download the Product details and Technical drawing PDF from the link below.

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