Grohe RAPID SLX 3-IN-1 WC SET for Shower WC

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GROHE introduces the new Rapid SLX concealed cistern. With the GROHE Rapid SLX you are prepared for the future. It is therefore best suited for all rimless toilets and shower toilets.


The strong, robust concealed cistern makes your daily work a lot easier. The larger mounting opening and the ultra-thin actuating plates with magnetic mounting allow you to install quickly. The Rapid SLX is also ideal for rimless shower toilets.


With the unique flow manager you can easily adjust the water volume at any time. This makes the Rapid SLX perfectly suitable for the growing market range of rimless toilets where splashing water often occurs. With the flow manager, the water volume can be adjusted by turning a rod - without removing the bottom valve. This saves time and therefore money.


The Rapid SLX is also fully prepared for all shower toilets. The Rapid SLX is fitted as standard with the latest ultra-thin flush plates from GROHE that are up to 50% smaller and up to 80% thinner than other flush plates.

EXTRA Features:

  • with GD-2 reservoir
  • consists of:
  • Rapid SLX element for WC (38 596 000) with integrated power socket
  • Rapid SL Wall mounting kit (38 558 00M)
  • Sound attenuation set (37 131 000)
  • including flow manager


  • with GD-2 reservoir
  • with integrated power socket
  • water connection prepared for shower toilet
  • inspection shaft for ultra-thin flush plates (S variant)
  • application: for wall or system wall mounting
  • coated steel frame, self-supporting
  • completely pre-assembled
  • fixed object connections
  • with height adjustment fixation
  • mounting material
  • TÜV approved
  • 2 WC threaded rods
  • ceramic mounting
  • distance between threaded ends 180/230 mm
  • drain bend Ø 90 mm
  • adjustable in depth
  • adapter Ø 90/110 mm
  • supply and discharge fittings
  • GD-2 reservoir, 6 - 9 L, contains the following properties
  • factory set to 6L and 3L
  • pneumatic coil principle with 3 functions;
    large flush, small flush and flush interruption
  • water connection right or rear
  • noise class I < 20 dBA
  • insulated against condensation
  • water connection 1/2" with integrated angle valve,
    hose can be mounted manually
  • no tools required for the installation of the inspection shaft
    incl. protective cover during the construction phase
  • for vertical mounting
  • including flow manager
  • reduces flow of the flush
  • prevents overspill in rimless toilets
  • easy flow regulation via inspection shaft without removing the valves
  • wall mounting set 38 558 00M available separately


Pros and cons

  • 3-in-1 set: high-quality concealed cistern with wall mountings and a sound attenuation set
  • Thanks to the flow manager, the reservoir is ideal for combining with a rimless shower toilet
  • Plug & Play design: thanks to the socket and water connection, the reservoir can be combined with a shower toilet
  • Grohe Whisper mutes the sound of the (water-saving) flushes
  • Including the necessary fixings and QuickFix for a simple and quick installation


Grohe Rapid SLX concealed cistern 3-in-1 set 113 cm

Create the bathroom or toilet room of your dreams, complete with a floating toilet, with this Grohe Rapid SLX concealed cistern. This set consists of the Grohe Rapid SLX concealed cistern, associated wall mountings and a sound damping set. Are you interested in the Grohe Rapid SLX? Order these quickly and easily in our webshop.

Powder-coated steel frame

The Grohe Rapid SLX concealed cistern is extra strong and versatile and has an attractive powder coated steel frame. The Rapid SLX is TÜV approved for a maximum load of 400 kg! Performance you can rely on.

Easy installation and future proof

This concealed cistern is easy and quick to install thanks to the Grohe Quickfix System. The installation height of this reservoir is 113 cm. In addition, this concealed cistern from Grohe Rapid SLX is also ready for the future! For example, if you would like to adjust the space. With the unique Flowmanager you can easily adjust the water flow. This way you can adapt the water flow to every new toilet, such as a rimless toilet (use less flush volume). It Plug & Play design contains a socket and water connection, so that you can also easily install a shower toilet on the reservoir in the future.

Enjoy peace and quiet

The built-in reservoir is equipped with the Grohe Whisper technology. This technology ensures that the sound of the double cistern is muffled. This way you can enjoy peace and quiet during your toilet visit.

Water saving

From Grohe Ecojoy technology ensures that your water consumption is reduced by up to 50%. You simply select a flush volume of 3 or 6 liters. This technology is friendly to the environment and your wallet!

Wall mounting and sound attenuation kit

In addition to the built-in reservoir, this set is also equipped with wall mount and a sound attenuation set. With the wall mounting you can easily mount the concealed cistern on the wall. This provides extra strength. The soundproofing set consists of an insulation mat that you can place between your toilet and the tiles. As a result, there is no friction between your (tile) wall and toilet bowl and you can place the toilet tightly against the wall. This mat also prevents creaking noises when you sit on the toilet.

Can be combined with stylish Grohe . flush plates

Combine the concealed cistern with a stylish pressure plate from Grohe. This one printing plates are there in various colors and designs, so you will always find one that fits your space! You can easily attach these Grohe flush plates to the drain knobs using our Easy Connect-systeem on the built-in reservoir. How can you be sure that the Grohe pressure plate is suitable? You can be sure that the printing plate you choose is suitable if the following is included in the name of the article: “for Grohe SLX”.

Most important features

  • Material: steel
  • Material cistern: plastic
  • Installation height: 113 cm
  • Including mounting material
  • Size: 50 x 16,5 x 133 cm
  • Adjustable in height
  • Maximum flushing water volume: 6L
  • Minimum flushing water volume: 3L


  • A 3-in-1 set: high-quality concealed cistern with wall mountings and a soundproofing set.
  • Grohe Flowmanager: allows you to easily adjust the water flow.
  • Plug & Play design: thanks to the socket and water connection, the reservoir can be combined with a shower toilet.
  • Grohe Whisper muffles the sound of the (water-saving) flushes.
  • Including the necessary fixings and QuickFix for a simple and quick installation.


Basic properties

item number 39598000
EAN 4005176527517

Sizes and weight

Afmeting 50x16,5x133 cm
Width (Range) 500 mm
Height (Range) 1130-1330 mm
Depth (Range) 145-165 mm
Adjustable in width
Adjustable in height And
Adjustable in depth And
Outer Pipe Diameter Drain 9.00 cm


Suitable for manual operation  And  Rinse Other 
Suitable for pneumatic operation And
Suitable for electrical operation And
Suitable for front control And
Suitable for shelf operation new
Rinsing water quantity adjustable And


Factory setting rinse water volume And
Max. flushing water quantity 6 L
Construction self-supporting And
Commercial Color Name And
OtherSurface protection coated
Colour Other

To belong

With drain bend new
With mounting material element And
With shut-off valve And
With impact sound insulation set And
Frame suitable for toilet with jump > 60cm And
With supply and discharge fittings And

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