Kludi Parts Slim.Boxx 88022 concealed thermostatic valve (from 2024)
Here you will find the technical parts of a Kludi concealed thermostatic valve (shower or bath) on the Slim.Boxx concealed part 88022. Since May 2024, the Slim.Boxx has replaced the Flexx.Boxx 88011: it is half a centimeter flatter and has ½" connections. The thermostatic element and the stop/diverter are included in the installation set, for example Kludi Zenta SL 388100545 (bath/shower) or 388850545 (shower).
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Thermostatic element (pos. 7): 7639000-00, flow rate approx. 28 l/min at 3 bar.
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Stop/diverter (pos. 10), sets ++810++++: 7331937-00, with hexagonal locking nut (no special tool required).
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Stop valve, sets ++885++++: 7356537-00.
- Central thermostatic valve (sets ++739++++): thermostatic element 7310800-00, approx. 40 l/min at 3 bar.
The drawing is of the Kludi Balance installation set 528100575. The technical design is the same for all series; the handle (pos. 1), the rosette (pos. 4) and the sleeve (pos. 6) vary by series and colour and can be found on the parts diagram for your tap.
Which concealed part do you have?
You can tell by the article number of your installation set (the chrome exterior). Look at the 3rd, 4th and 5th digits, for example 388300545.
| Installation set |
Concealed part |
Thermostatic element |
| ++820++++ / ++825++++ |
Flexx.Boxx 88066 (until April 2012) |
7480900-00 (included in the concealed part) |
| ++830++++ / ++835++++ |
Flexx.Boxx 88011 (May 2012 - 2024) |
7492600-00, from 2018 7639000-00 |
| ++810++++ / ++885++++ |
Slim.Boxx 88022 (from May 2024) |
7639000-00 |
| ++729++++ / ++739++++ (central thermostatic valve) |
88011 / 88022 |
7310800-00 |
Use the buttons at the top to switch between the versions.
Replacing the thermostatic element
- Turn off the main valve and cover the drain so that no small parts fall in.
- Open the volume control handle (on/off); no water should come out now.
- Use a small screwdriver to pry off the cover of the temperature handle, loosen the screw underneath and remove the handle.
- Slide off the locking sleeve and unscrew the chrome-plated sleeve.
- Unscrew the large brass spindle completely and remove the thermostatic element.
- Insert the new (or descaled) thermostatic element and tighten it.
- Slide the locking sleeve back with the marking at the top, close the volume control and turn the main valve back on.
- From the factory, the element is set to approximately 38 °C. Do you want a different safety stop temperature? Let the water run and turn the spindle until you have the desired temperature. Then mount the temperature handle with the safety stop button facing up and click the cover back into place.
Tip: open and close the handles fully every now and then; this keeps the moving parts smooth. Remove limescale with a citric acid-based product and then rinse thoroughly; never use abrasive products.
Not sure which part you need? Send us a photo and we will find it for you!
