What's the difference between a Duofix frame, an Alpha/Alpha01 cistern and a Monolith unit, and which should you pick?

Duofix frames are steel support frames designed to sit inside a stud or false wall and are ideal if you want a wall-hung pan with a fully hidden cistern; many Duofix options come as complete 6/3L kits with Alpha01 flush plates. Alpha cisterns are the in-wall cistern units (also available with Alpha01 round or square plates) that sit behind furniture or a partition for a minimalist look. Monolith modules are finished, tall sanitary units in glass or stoneware that sit in front of the wall and give a designer look without building a stud wall, ideal when you want an exposed, elegant finish in white glass, black glass or a concrete look. If you can build a stud wall and want the most minimal look go Duofix; if you prefer a finished surface without construction, choose Monolith; Alpha cisterns suit simple in-wall concealment or furniture installations.

How do I choose the right frame or cistern height — 820mm, 980mm, 1090mm or 1120mm — for my bathroom?

Shorter options such as 820mm suit compact cloakrooms or low-profile installations where you use a small wall-hung pan, while 980mm to 1090mm are common for standard wall-hung bowls in family bathrooms and give a little more room for plumbing and access. The taller 1120mm frames are useful if you want a higher pan position or are matching a half-height false wall. pick an 820mm Duofix for a tight cloakroom with a compact pan, but a 980–1090mm unit for a main bathroom with a standard-height wall-hung toilet.

My existing pan is floor-standing — are concealed cisterns compatible with that, or do I need a specific product?

Yes, there are cistern solutions for floor-standing pans; some products are described as "Floor Standing" compatible and Monolith sanitary modules include floor-standing versions (114cm and 101cm heights). If your pan sits on the floor, choose a floor-standing compatible unit or a Monolith sanitary module for floor-standing WCs, rather than a wall-hung Duofix frame. a Monolith module in white glass at 114cm pairs neatly with a traditional floor-standing WC while still hiding the cistern.

How do the Alpha01 round and square flush plates change the look and function of the installation?

The Alpha01 round plate gives a softer, more traditional appearance, while the square Alpha01 offers a contemporary, geometric look, both are available with the 6/3L dual-flush operation. Functionally they perform the same dual-flush role, but visually choosing round or square helps tie the toilet area to other bathroom fittings, use a round plate to echo curved basins or a square plate to match linear furniture handles. Many Duofix and Alpha kits are supplied with your choice of Alpha01 plate so you can match the style at purchase.

What do the 6/3L and "dual flush" labels mean for water use and performance?

A 6/3L dual-flush cistern offers two flush volumes, a larger 6-litre flush for solids and a smaller 3-litre flush for liquids, which reduces water use compared with older higher-volume systems. That size is common across the Geberit Duofix and Alpha cisterns included in our range and suits most homes aiming to save water without sacrificing performance. in a busy family bathroom the smaller flush for quick uses can cut your water consumption significantly over time.

Geberit Concealed Cisterns

Is the look of your bathroom getting you down? If you're tired of having a bulky, unsightly toilet, a concealed cistern might be perfect for you. As the name suggests, the concealed cistern hides the cistern of your toilet, this can be done behind a wall or by using a furniture unit and leads to a sleek, minimalistic look. Geberit Concealed Cisterns provide everything you want in terms of style - they also excel in functionality, boasting large and small flush options. Elevate your bathroom's aesthetics and performance with Geberit's range of Concealed Cisterns.

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Geberit Concealed Cisterns

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Geberit Sigma Dual Flush Concealed Cistern

Geberit Monolith Sanitary Module for Wall Hung WC, 101cm – White Glass 131.021.SI.5

Geberit Alpha 820mm 6/3L Concealed Cistern - 109.002.00.1

Geberit Alpha 1090mm Concealed Cistern - 109.012.00.1

Geberit Duofix 980mm WC Frame & 6/3L Concealed Cistern for Wall Mounted Pans - 458.036.00.2

Geberit Duofix 1120mm WC Frame & 6/3L Concealed Cistern for Wall Mounted Pans - 458.039.00.2

Geberit Alpha 1090mm Concealed Cistern with Alpha01 Square Flush Plates - 109.013.21.1

Geberit Alpha 1090mm Concealed Cistern with Alpha01 Round Flush Plates - 109.014.21.1

Geberit Duofix 980mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Flush Plate 458.037.21.2

Geberit Duofix 980mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Flush Plate 458.038.21.2

Geberit Duofix 1120mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Flush Plate 458.040.21.2

Geberit Duofix 1120mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Actuator 458.041.21.2

Geberit Duofix 820mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Flush Plate 458.034.21.2

Geberit Duofix 820mm Wall Hung WC Frame, 6/3L Concealed Cistern, Alpha01 Flush Plate 458.035.21.2

Geberit Alpha 820mm Concealed Cistern with Alpha01 Square Flush Plates - 109.003.21.1

Geberit Alpha 820mm Concealed Cistern with Alpha01 Round Flush Plates - 109.004.21.1

Geberit Monolith Sanitary Module for Floor Standing WC, 114cm - Stoneware Concrete Look 131.033.JV.5

Geberit Monolith Sanitary Module for Floor Standing WC, 114cm – Black Glass 131.033.SJ.6

Geberit Monolith Sanitary Module for Floor Standing WC, 114cm – White Glass 131.033.SI.5

Geberit Monolith Sanitary Module for Floor Standing WC, 101cm – White Glass 131.002.SI.5

Geberit Monolith Sanitary Module for Bidet, 101cm, with Towel Rail – White Glass 131.030.SI.5

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