Grohe Rapid SL WC element for Shower WC

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GROHE Rapid SL Installation System – fast installation time and whisper-quiet WC

This GROHE Rapid SL installation system offers many advantages during and after installation. Thanks to GROHE QuickFix®, you can quickly and flexibly install the toilet on a fixed wall or in a partition wall. The system is TÜV-approved and with a load capacity of 400 kg, it is extremely solid. The wall mounting set 3855800M must be ordered separately if necessary. Once installed, maintenance is quick and easy thanks to the floating toilet and the concealed flush cistern.

Thanks to GROHE Whisper®, the toilet is whisper-quiet and the GROHE EcoJoy® duo flush saves up to 50% on your water. This Rapid SL concealed cistern is suitable for combining with Auto Flush, automatic flushing or controlled via App, together with the Sensia Arena!


cistern GD 2 with connections for Grohe Sense® shower toilet (Sensia® IGS/Sensia® Arena)
construction height 1.13 m
for mounting on the wall or in a light crossbeam
steel frame
powder coated
for plasterboard walls
completely pre-assembled
fixed object connection
quick setting
mounting material
TÜV certified
2 brackets for WC
fixing ceramic sanitary ware
screw spacing 180/230 mm
PP discharge bend Ø 90 mm
adjustable in depth
reduction Ø 90/110 mm
supply and discharge fittings
spoelreservoir GD2, 6 - 9 l
factory set to 6 l - 3 l
pneumatic drain valve offers 3 operating modes: dual flush or start/stop or continuous (start only)
water supply from behind
luminaire group I – low noise production
insulated against condensation
water connection DN 15 with integrated angle valve and screw connection, without the need for tools
no tools required for installation, control spindle including protection during the build-up phase
for vertical or horizontal use
2 wall corner pieces with mounting material
universal water connections for shower toilets Sensia Arena and Sensia IGS
power strip for connection to the mains
positioning of the electrical connection


  • Adjustable in height
  • Rinsing water quantity: 6-9 liters
  • Including mounting material
  • Including drain bend

Start with a flexible and hassle-free installation. This Rapid SL installation system optimized for Grohe Sensia Arena WCs* is designed to provide maximum comfort in the bathroom. With the advanced Grohe Sensia toilets, a perfect combination of the functions of a toilet and bidet, discover a new form of convenience and hygiene. Thanks to the Grohe QuickFix system, the shower toilet can easily be installed on or in a wall or system wall. No tools are required to attach the hose or overhaul shaft. Tested and certified for a load capacity of 400 kg. The powder-coated steel frame is stable and can be safely hung at home.

Thanks to the wall-hung toilet with concealed cistern, cleaning the bathroom is easier than ever. The WC is fitted with silent fittings and disconnected pipes. The Grohe Whisper sound attenuation prevents the sound of the flush from being transferred into adjacent rooms. The Grohe EcoJoy dual-flush system reduces water consumption by up to 50% when flushing.

The Grohe Sensia shower toilets will drastically change everyday bathroom routines. In combination with this installation system and the Grohe flush plate of your choice, it will fit perfectly with any bathroom interior. Please note that for small flush plates, the Grohe revision shaft (40911000) must be purchased.

If a cohesive whole needs to be created, check out the extensive range of complete bathroom series, including taps, showers, accessories and ceramics!

* This installation system is also compatible with shower toilets from other manufacturers.

Most important features

  • With GROHE EcoJoy® you save up to 50% on your water consumption and in your wallet
  • SpareFlush: never a flushing problem again thanks to 3L extra flushing water
  • Quick installation without tools for water connection, flexible hose and inspection shaft.
  • Shorter installation time thanks to GROHE QuickFix®
  • Thanks to Safety, the Rapid SL installation system can be loaded up to 400 kg without risk
  • Universally applicable - suitable for any WC flush plate
  • With EasyConnect you can easily attach the pneumatic hose between the actuating plate and the drain valve
  • With VarioPort you can make the water connection quickly and easily
  • Quick and easy installation thanks to only one drain valve for all flushing functions

Rapid SL installation system - guaranteed to be installed in a short time
Grohe QuickFix® has been specially developed for simple and flexible installation. The system guarantees that installing the Rapid SL series is considerably easier and faster than with any other system. In an independent test in Germany (practice test by REFA-Bundesverbandes) this series came out as number 1 in the test. Regardless of whether it was the installation of a toilet, washbasin, urinal or bidet. This universal program helps to achieve the best results with minimal effort, even in the most extravagant bathrooms.

The installation, consisting of completely pre-assembled parts, is suitable for mounting one or more elements at different heights on a solid wall or for recessing into the wall.

Rapid SL stands for pure functionality. Both during and after installation. The total concept has been thought out in detail to make it easier for everyone.

Sound attenuation for the adjacent room
Sound from installation systems can transfer into the house, for example into adjacent bedrooms. Not with Grohe installation systems, which feature Grohe Whisper® technology. Thanks to technical optimization, they are the quietest products (in their category) in the industry. Noise pollution does not have to be taken into account when planning the bathroom. The toilet can be placed anywhere.

Grohe EcoJoy® – less water consumption for a better environment
Grohe EcoJoy® saves up to 50% on water consumption when flushing. With the 2-button technology you can choose a small flush of 3 liters or a large flush of 6 liters. It is also possible to stop the large flush prematurely by pressing the small flush button.